Free Mechanical 3D Models

318 3D parts in Mechanical · Clear all

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  Turbofan exterior assembly

  Turbofan exterior assembly, modeled from published dimensions. Overall 1.6 x 3.1 x 1.6 m. Key dimensions: fan blades 20; compressor rotor rows 7; turbine rotor rows 4; nacelle max diameter 1600 mm; overall axial length 3070 mm; cutaway degrees 0. Original unbranded dimensioned concept following the basic fan/compressor/combustor/turbine/nozzle arrangement described by NASA. Editable component groups include 20 fan blades, seven compressor rotor rows, a perforated liner and four turbine rows. Blade sections, stage count, shaft and proportions are original visualization choices. Stator rows, separate concentric spools, bearings, mounts, fuel plumbing and controls are omitted. It is not a production engine, aerodynamic/thermal simulation or thrust-rated design. glTF binary (GLB) mesh with materials, modeled in meters at real-world scale. Export to other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

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  Unbranded V8 engine assembly

  Unbranded V8 engine assembly, modeled from published dimensions. Overall 683.9 x 600 x 400 mm. Key dimensions: cylinders 8; bank angle deg 90; bore diameter 80 mm; cylinder pitch 100 mm; crank axis height 150 mm; block length 450 mm. Original dimensioned V8 exterior assembly with eight cylinder barrels, two heads and ribbed valve covers, intake runners/plenum, two four-branch exhaust manifolds, oil pan/filter, flywheel and front accessories. This is an unbranded packaging and visualization design. Internal crank throws, pistons, rods, valves, timing drive, wiring and coolant passages are omitted; shaft, throttle and accessory internals are simplified. No engine displacement, performance or production-fit claim is made. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  9.6 MBDetails & download
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  Six-axis industrial robot with gripper

  Six-axis industrial robot with gripper, modeled from published dimensions. Overall 953.4 x 365 x 904.3 mm. Key dimensions: rotary axes 6; base diameter 320 mm; base mount PCD 260 mm; base hole diameter 14.4 mm; upper arm pivot length 406.1 mm; forearm pivot length 345.4 mm; gripper opening 38 mm. Original unbranded six-axis robot layout with mounting base, yaw fork, upper arm, offset forearm, roll/pitch/roll wrist and parallel gripper. Six joint origins and directions are included in parameters.json; named CAD/Blender components remain editable. Shown in one static pose with geometric assembly clearance. Motor windings, reducers, cabling, encoders and controller are omitted. This is a dimensioned layout design, not a manufacturer robot, load-rated mechanism or automatically constrained motion rig. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  684 KBDetails & download
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  ANSI #40 10-pitch chain segment

  ANSI #40 10-pitch chain segment, modeled from published dimensions. Overall 139 x 12 x 14.3 mm. Key dimensions: chain size 40; pitch 12.7 mm; roller or bush diameter 7.9 mm; inner width 8 mm; pin diameter 4 mm; plate thickness 1.5 mm. Chain pitch, roller/bush diameter and inner width follow Tsubaki published ANSI dimensions. Number 25 is a bush chain, with no independent roller; the pictured sleeve represents the bush. Original sprocket blanks use chordal pitch-circle geometry and circular roller seats with 0.08 mm radial clearance. Tooth-tip/flank entry contours and chain plate waists are simplified; this is an installation/layout model, not a production hob profile or rated drive. Pins, sleeves and alternating plates remain separately editable. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  679 KBDetails & download
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  ANSI #40 24t sprocket

  ANSI #40 24t sprocket, modeled from published dimensions. Overall 103.6 x 103.6 x 12.6 mm. Key dimensions: chain size 40; pitch 12.7 mm; roller or bush diameter 7.9 mm; inner width 8 mm; pin diameter 4 mm; plate thickness 1.5 mm; teeth 24. Chain pitch, roller/bush diameter and inner width follow Tsubaki published ANSI dimensions. Number 25 is a bush chain, with no independent roller; the pictured sleeve represents the bush. Original sprocket blanks use chordal pitch-circle geometry and circular roller seats with 0.08 mm radial clearance. Tooth-tip/flank entry contours and chain plate waists are simplified; this is an installation/layout model, not a production hob profile or rated drive. Pins, sleeves and alternating plates remain separately editable. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  434 KBDetails & download
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  ANSI #40 16t sprocket

  ANSI #40 16t sprocket, modeled from published dimensions. Overall 70.8 x 70.8 x 12.6 mm. Key dimensions: chain size 40; pitch 12.7 mm; roller or bush diameter 7.9 mm; inner width 8 mm; pin diameter 4 mm; plate thickness 1.5 mm; teeth 16. Chain pitch, roller/bush diameter and inner width follow Tsubaki published ANSI dimensions. Number 25 is a bush chain, with no independent roller; the pictured sleeve represents the bush. Original sprocket blanks use chordal pitch-circle geometry and circular roller seats with 0.08 mm radial clearance. Tooth-tip/flank entry contours and chain plate waists are simplified; this is an installation/layout model, not a production hob profile or rated drive. Pins, sleeves and alternating plates remain separately editable. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  293 KBDetails & download
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  ANSI #25 10-pitch chain segment

  ANSI #25 10-pitch chain segment, modeled from published dimensions. Overall 69.3 x 5.8 x 6.5 mm. Key dimensions: chain size 25; pitch 6.4 mm; roller or bush diameter 3.3 mm; inner width 3.2 mm; pin diameter 2.3 mm; plate thickness 0.8 mm. Chain pitch, roller/bush diameter and inner width follow Tsubaki published ANSI dimensions. Number 25 is a bush chain, with no independent roller; the pictured sleeve represents the bush. Original sprocket blanks use chordal pitch-circle geometry and circular roller seats with 0.08 mm radial clearance. Tooth-tip/flank entry contours and chain plate waists are simplified; this is an installation/layout model, not a production hob profile or rated drive. Pins, sleeves and alternating plates remain separately editable. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  682 KBDetails & download
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  ANSI #25 24t sprocket

  ANSI #25 24t sprocket, modeled from published dimensions. Overall 51.8 x 51.8 x 7.8 mm. Key dimensions: chain size 25; pitch 6.4 mm; roller or bush diameter 3.3 mm; inner width 3.2 mm; pin diameter 2.3 mm; plate thickness 0.8 mm; teeth 24. Chain pitch, roller/bush diameter and inner width follow Tsubaki published ANSI dimensions. Number 25 is a bush chain, with no independent roller; the pictured sleeve represents the bush. Original sprocket blanks use chordal pitch-circle geometry and circular roller seats with 0.08 mm radial clearance. Tooth-tip/flank entry contours and chain plate waists are simplified; this is an installation/layout model, not a production hob profile or rated drive. Pins, sleeves and alternating plates remain separately editable. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  435 KBDetails & download
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  ANSI #25 16t sprocket

  ANSI #25 16t sprocket, modeled from published dimensions. Overall 35.5 x 35.5 x 7.8 mm. Key dimensions: chain size 25; pitch 6.4 mm; roller or bush diameter 3.3 mm; inner width 3.2 mm; pin diameter 2.3 mm; plate thickness 0.8 mm; teeth 16. Chain pitch, roller/bush diameter and inner width follow Tsubaki published ANSI dimensions. Number 25 is a bush chain, with no independent roller; the pictured sleeve represents the bush. Original sprocket blanks use chordal pitch-circle geometry and circular roller seats with 0.08 mm radial clearance. Tooth-tip/flank entry contours and chain plate waists are simplified; this is an installation/layout model, not a production hob profile or rated drive. Pins, sleeves and alternating plates remain separately editable. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  293 KBDetails & download
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  Rigid coupling, 8 to 8 mm

  Rigid coupling, 8 to 8 mm, modeled from published dimensions. Overall 20 x 20 x 25 mm. Key dimensions: bore 1 8 mm; bore 2 8 mm; outside diameter 20 mm; length 25 mm; bore transition z 12.5 mm; shaft engagement 12.5 mm; set screws 4 x M4, cylindrical thread envelopes. Original library coupling, not a dimensional copy of a Ruland product. The reference describes the rigid set-screw coupling class. Exact nominal bores, engagement and screw locations are in the parameters. Thread forms, shaft indentation and tightening deformation are omitted. No torque capacity, speed rating, fatigue life or manufacturing tolerances are assigned. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  305 KBDetails & download
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  Rigid coupling, 5 to 8 mm

  Rigid coupling, 5 to 8 mm, modeled from published dimensions. Overall 20 x 20 x 25 mm. Key dimensions: bore 1 5 mm; bore 2 8 mm; outside diameter 20 mm; length 25 mm; bore transition z 12.5 mm; shaft engagement 12.5 mm; set screws 4 x M4, cylindrical thread envelopes. Original library coupling, not a dimensional copy of a Ruland product. The reference describes the rigid set-screw coupling class. Exact nominal bores, engagement and screw locations are in the parameters. Thread forms, shaft indentation and tightening deformation are omitted. No torque capacity, speed rating, fatigue life or manufacturing tolerances are assigned. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  366 KBDetails & download
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  Helical coupling, 8 to 8 mm

  Helical coupling, 8 to 8 mm, modeled from published dimensions. Overall 25 x 25 x 30 mm. Key dimensions: bore 1 8 mm; bore 2 8 mm; outside diameter 25 mm; length 30 mm; bore transition z 15 mm; hub shaft engagement 8 mm; slit pitch 3.2 mm; slit turns 3; slit axial width 0.7 mm; clamp screws 2 x M3, cylindrical thread envelopes. Original parametric helical-beam coupling. The continuous 3-turn cut joins two slotted clamp hubs in one solid; declared dimensions are library design choices, not vendor specifications. The model is shown unstressed. Beam strength, torsional stiffness, misalignment capacity and fatigue life have not been calculated. Thread forms and tightening deformation are omitted. Shaft insertion should remain within the 8 mm end hubs. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  547 KBDetails & download
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  Helical coupling, 5 to 8 mm

  Helical coupling, 5 to 8 mm, modeled from published dimensions. Overall 25 x 25 x 30 mm. Key dimensions: bore 1 5 mm; bore 2 8 mm; outside diameter 25 mm; length 30 mm; bore transition z 15 mm; hub shaft engagement 8 mm; slit pitch 3.2 mm; slit turns 3; slit axial width 0.7 mm; clamp screws 2 x M3, cylindrical thread envelopes. Original parametric helical-beam coupling. The continuous 3-turn cut joins two slotted clamp hubs in one solid; declared dimensions are library design choices, not vendor specifications. The model is shown unstressed. Beam strength, torsional stiffness, misalignment capacity and fatigue life have not been calculated. Thread forms and tightening deformation are omitted. Shaft insertion should remain within the 8 mm end hubs. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  553 KBDetails & download
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  Three-planet 4:1 gearbox open assembly

  Three-planet 4:1 gearbox open assembly, modeled from published dimensions. Overall 108 x 108 x 31.5 mm. Key dimensions: module 1.5 mm; pressure angle deg 20; sun teeth 18; planet teeth 18; ring teeth 54; planet count 3; planet center radius 27 mm; ratio ring fixed 4; gear face width 12 mm; sun bore 8 mm; planet bore 6 mm; case mount PCD 100 mm; case mount holes 5.2 mm. Original three-planet arrangement: 18-tooth sun, three 18-tooth planets, internal 54-tooth ring. Ring fixed gives 4:1 sun-to-carrier reduction. Three equally spaced planets satisfy (18+54)/3 = 24 for assembly phasing. Spline-fitted 20-degree involutes and selected backlash. Case, carrier, pins, washers and gears are separate solids; the lower housing clears the rotating carrier. Bearing races, seals, fasteners and lubrication are omitted. No load rating or manufacturing gear class is claimed. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  6.1 MBDetails & download
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  Three-planet 4:1 gearbox with cover

  Three-planet 4:1 gearbox with cover, modeled from published dimensions. Overall 108 x 108 x 36 mm. Key dimensions: module 1.5 mm; pressure angle deg 20; sun teeth 18; planet teeth 18; ring teeth 54; planet count 3; planet center radius 27 mm; ratio ring fixed 4; gear face width 12 mm; sun bore 8 mm; planet bore 6 mm; case mount PCD 100 mm; case mount holes 5.2 mm. Original three-planet arrangement: 18-tooth sun, three 18-tooth planets, internal 54-tooth ring. Ring fixed gives 4:1 sun-to-carrier reduction. Three equally spaced planets satisfy (18+54)/3 = 24 for assembly phasing. Spline-fitted 20-degree involutes and selected backlash. Case, carrier, pins, washers and gears are separate solids; the lower housing clears the rotating carrier. Bearing races, seals, fasteners and lubrication are omitted. No load rating or manufacturing gear class is claimed. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  6.2 MBDetails & download
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  Module 1.5 worm and 40-tooth wheel

  Module 1.5 worm and 40-tooth wheel, modeled from published dimensions. Overall 63 x 78 x 20 mm. Key dimensions: axial module 1.5 mm; axial pressure angle deg 20; worm starts 1; wheel teeth 40; ratio 40; worm pitch diameter 15 mm; wheel pitch diameter 60 mm; center distance 37.5 mm; worm lead 4.7 mm; wheel face width 12 mm; wheel bore 10 mm; worm shaft diameter 10 mm; envelope phases 721; envelope axial sections 13; hob clearance 0.2 mm. Original 40:1 crossed-axis worm assembly. Forty throated helical wheel teeth are lofted from a numerical envelope of a trapezoidal worm hob at 721 synchronized poses over eight revolutions. Thirteen axial sections and 49 radial samples per tooth define the editable CAD approximation. Selected 0.20 mm tool clearance plus 0.025 mm radial interpolation relief. Finite sampling, spline interpolation, roots and end runouts are simplified; this is a layout model, not a manufacturing hobbing master. Lubrication, loads, efficiency and self-locking are not simulated. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  12.1 MBDetails & download
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  Module 2 straight bevel pair, 1:1

  Module 2 straight bevel pair, 1:1, modeled from published dimensions. Overall 49.6 x 44 x 49.4 mm. Key dimensions: module outer 2 mm; ratio 1; shaft angle deg 90; pitch cone angle deg 45; outer pitch diameter 40 mm; outer cone distance 28.3 mm; axial tooth span 7 mm; bore 8 mm; mount offset 0.6 mm. Original layout pair with 45-degree pitch cones and 20-tooth conically scaled involute end sections. This straight loft approximates the bevel tooth shape; it is not a generated spherical involute/octoid or a manufacturing master. Both gears have a 0.6 mm outward mounting offset for static mesh clearance. Original hubs and bores; no conjugate rolling accuracy, backlash class or load capacity is claimed. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  2.4 MBDetails & download
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  Module 2 spur pair, 20:40 teeth

  Module 2 spur pair, 20:40 teeth, modeled from published dimensions. Overall 123.9 x 83.8 x 18 mm. Key dimensions: module 2 mm; pressure angle deg 20; center distance 60 mm; ratio 2; face width 12 mm; nominal pitch backlash 0.2 mm. Original matching 2:1 spur pair at the standard center distance. Both gears use the same 20-degree involute recipe as the individual variants; the 40-tooth wheel is rotated 4.5 degrees into mesh. Static CAD assembly with selected 0.08 times module total pitch-circle backlash. Sharp simplified roots, spline-approximated flanks and original hubs/bore choices are not a manufacturing or load-rated gear specification. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  3.2 MBDetails & download
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  Module 1 spur pair, 20:40 teeth

  Module 1 spur pair, 20:40 teeth, modeled from published dimensions. Overall 62 x 41.9 x 11 mm. Key dimensions: module 1 mm; pressure angle deg 20; center distance 30 mm; ratio 2; face width 8 mm; nominal pitch backlash 0.1 mm. Original matching 2:1 spur pair at the standard center distance. Both gears use the same 20-degree involute recipe as the individual variants; the 40-tooth wheel is rotated 4.5 degrees into mesh. Static CAD assembly with selected 0.08 times module total pitch-circle backlash. Sharp simplified roots, spline-approximated flanks and original hubs/bore choices are not a manufacturing or load-rated gear specification. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  3.2 MBDetails & download
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  Module 2, 40-tooth involute spur gear

  Module 2, 40-tooth involute spur gear, modeled from published dimensions. Overall 84 x 84 x 18 mm. Key dimensions: module 2 mm; teeth 40; pressure angle deg 20; pitch diameter 80 mm; base diameter 75.2 mm; tip diameter 84 mm; root diameter 75 mm; bore 12 mm; face width 12 mm; hub height 6 mm; hub diameter 24 mm; pitch tooth thickness 3.1 mm. Original library dimensions; standard unshifted involute equations follow KHK Table 4.1. The involute flanks are spline-fitted from 33 analytic samples each; tip and root lands are circular arcs. Each tooth is thinned by 0.04 times module at the pitch circle. Radial extensions below the base circle have sharp root transitions rather than a generated cutter trochoid. Hub and bore are original choices; no gear accuracy class, strength or manufacturing fit is certified. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  2.1 MBDetails & download
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  Module 2, 20-tooth involute spur gear

  Module 2, 20-tooth involute spur gear, modeled from published dimensions. Overall 44 x 44 x 18 mm. Key dimensions: module 2 mm; teeth 20; pressure angle deg 20; pitch diameter 40 mm; base diameter 37.6 mm; tip diameter 44 mm; root diameter 35 mm; bore 10 mm; face width 12 mm; hub height 6 mm; hub diameter 22 mm; pitch tooth thickness 3.1 mm. Original library dimensions; standard unshifted involute equations follow KHK Table 4.1. The involute flanks are spline-fitted from 33 analytic samples each; tip and root lands are circular arcs. Each tooth is thinned by 0.04 times module at the pitch circle. Radial extensions below the base circle have sharp root transitions rather than a generated cutter trochoid. Hub and bore are original choices; no gear accuracy class, strength or manufacturing fit is certified. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  1.0 MBDetails & download
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  Module 1, 40-tooth involute spur gear

  Module 1, 40-tooth involute spur gear, modeled from published dimensions. Overall 42 x 42 x 11 mm. Key dimensions: module 1 mm; teeth 40; pressure angle deg 20; pitch diameter 40 mm; base diameter 37.6 mm; tip diameter 42 mm; root diameter 37.5 mm; bore 8 mm; face width 8 mm; hub height 3 mm; hub diameter 14 mm; pitch tooth thickness 1.5 mm. Original library dimensions; standard unshifted involute equations follow KHK Table 4.1. The involute flanks are spline-fitted from 33 analytic samples each; tip and root lands are circular arcs. Each tooth is thinned by 0.04 times module at the pitch circle. Radial extensions below the base circle have sharp root transitions rather than a generated cutter trochoid. Hub and bore are original choices; no gear accuracy class, strength or manufacturing fit is certified. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  2.1 MBDetails & download
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  Module 1, 20-tooth involute spur gear

  Module 1, 20-tooth involute spur gear, modeled from published dimensions. Overall 22 x 22 x 11 mm. Key dimensions: module 1 mm; teeth 20; pressure angle deg 20; pitch diameter 20 mm; base diameter 18.8 mm; tip diameter 22 mm; root diameter 17.5 mm; bore 5 mm; face width 8 mm; hub height 3 mm; hub diameter 11 mm; pitch tooth thickness 1.5 mm. Original library dimensions; standard unshifted involute equations follow KHK Table 4.1. The involute flanks are spline-fitted from 33 analytic samples each; tip and root lands are circular arcs. Each tooth is thinned by 0.04 times module at the pitch circle. Radial extensions below the base circle have sharp root transitions rather than a generated cutter trochoid. Hub and bore are original choices; no gear accuracy class, strength or manufacturing fit is certified. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  1.0 MBDetails & download
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  6 mm belt smooth idler, 5 mm bore

  6 mm belt smooth idler, 5 mm bore, modeled from published dimensions. Overall 20 x 20 x 8.5 mm. Key dimensions: pitch 2 mm; belt width 6 mm; toothed face width 6.5 mm; bore 5 mm. Original pulley flange, hub and bore dimensions. Toothed variants use the published Misumi 2GT belt profile (R0.15/R1.00/R0.555, 0.75 mm height, 0.254 mm pitch-line differential) bent onto the pitch circle and used as a nominal groove envelope. The profile is spline-approximated after circular mapping. No vendor sprocket machining allowance or manufacturing tooth-form certification is implied. Set-screw holes are unthreaded pilots; idlers omit internal bearing races. Exact solid STEP geometry in millimeters, opens in any CAD system. Export to STL, OBJ, GLB and other formats from the viewer. Nominal dimensions for layout, fit checks and visualization; they do not establish a manufacturing tolerance class, load rating or standards certification. Original Innerscene model, released CC0.

  20 KBDetails & download

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