N20 12.5 mm gearbox with rear shaft
3D model · STEP · 1.8 MB
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Source: Innerscene - original model
Description
N20 12.5 mm gearbox with rear shaft, modeled from published dimensions. Overall 12 x 10 x 43.7 mm. Key dimensions: gearbox width 12 mm; gearbox height 10 mm; gearbox length 12.5 mm; motor can length 15 mm; front face to terminal end 29.1 mm; output shaft diameter 3 mm; output D dimension 2.5 mm; output projection 10 mm; output boss diameter 4 mm; output boss projection 0.7 mm; mount pitch 9 mm; mount thread M1.6; rear shaft diameter 1 mm; rear shaft projection 5 mm. Nominal dimensions follow Pololu precious-metal-brush mechanical drawings (datasheet page 8). The long 12.5 mm gearbox envelope corresponds to the 1000:1 option. The shaft flat spans Z=1 to 10 mm; front mounting holes are nominal M1.6 envelopes. Visible spur gear stacks, tooth counts and axles are representative, not a working reduction train. Case seams, post positions and brush/terminal details are reconstructed. No ratio, torque, speed, tolerance or encoder functionality is 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.
File: n20-long-1000-rear-shaft.step · added 2026-10-05 · available until 2031-10-05. Added from Innerscene - original model under its CC0 dedication; see the library terms. Think this part infringes someone’s rights? Use Report on the viewer page or see our copyright policy.