MotoCAD

How a part gets made. Asked, built, checked, screened, released.

Front sprocket 520

Studio › Requirements2 questions

15 tooth front sprocket for 520 chainGenerate →

From your prompt

Chainprompt

520 p 15.875

Teethprompt

Asked before building

Hub diameterasked

36 mm under the chain plates

Lightening holesasked

none adds an FEA check

Generated 520 × 15T front sprocket, rendered from the CAD solid

Pitch circle Ø76.355Tip Ø84.0015 teeth · 520 chain Solid from the CAD engine · ISO 606

Route

ISO 606 generator

Build time

0.3 s

Outputs

STEP · PDF · DXF

Pitch circle Øpass

76.355 required 76.355

Tip Øpass

84.00 limits 80.38–86.04

Root Øpass

66.055 limits 65.94–66.19

Tooth root stressneeds FEA

screening model then a named engineer signs

Road use, 120 N·m at the countershaftRun →

Chain strength marginwarn

SF 5.8 target ≥ 6

Spline flank pressurepass

76 MPa limit 100

Tooth root bendingneeds FEA

3.77 kN load case handed to FEA

Generated A3 drawing sheet of the 520 x 15T sprocket

Requirements

Your prompt is read, and only the missing parameters are asked.

One sentence in. A checked part out.

15 tooth front sprocket for 520 chain

chain 520p 15.875z 15ISO 606spline asked

Describe

Plain words, parsed into parameters.

84.00tip Ø

66.055root Ø

Root stress Needs FEA

Measure

Every governed dimension, on the solid.

Hand off

Safety parts go to a named engineer.

Labelled sheets, drawn from the solid.

MC-SPR-016

Bolted joint M10×1.25

Rendered bolted joint: hex bolt through two clamped plates with washer and nut

ISO 8676bolt ISO 273hole ISO 7089washer ISO 8673nut VDI 2230torque

Parts it has built, fails included.

Triple clampP3

Stress map, FEA

Drag to turn

Open

What the test builds measured.

Internal builds, Oct 2026. One laptop, no GPU. Not independent validation.

346/346

sheet checks traced to the model

112in 19 min

triple-clamp FEA variants

Stress map, FEA FEA stress map of the lower triple clamp, high stress in red

Screen vs full FEA: 0 false passes

0.3s

to build the solid from parameters

Front sprocket 520 × 15TMC-SPR-016

Needs FEA

EngineerUnsigned

How a part gets made. Asked, built, checked, screened, released.