Gears and transmission
Simple Chop Saw for a 4.5 in Cut-off Wheel (two 24 mm motors)
- Bounding box
- 260.0 × 220.0 × 176.0 mm
- Engine
- Precision B-rep
- Parameters
- 23
- Published
- November 8, 2026
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The prompt
Simple 3D-printed chop saw for a 4.5 inch (114.3 mm) cut-off wheel with 7/8 inch bore: printed arbor adapter (pilot flange and clamp flange on an M8 threaded rod, 608 bearings) driven by two of the 24 mm DC motors through a 40-tooth arbor gear and two 15-tooth pinions; pivoting arm on 608 bearings and an 8 mm rod, base with fence and wheel slot, and a wheel hood
Parameters
| Name | Value | Range |
|---|---|---|
| Cut-off wheel diameter (4.5 inch = 114.3) | 114.3 mm | 100 – 125 |
| Cut-off wheel thickness | 1.6 mm | 1 – 3 |
| Wheel bore (7/8 inch = 22.23) | 22.23 mm | 22 – 22.5 |
| Clamp flange diameter | 40 mm | 30 – 50 |
| Arm length (pivot to wheel centre) | 120 mm | 100 – 150 |
| Pivot position behind the wheel plane | 90 mm | 70 – 120 |
| Pivot height above the base | 140 mm | 120 – 170 |
| How far the arm is drawn raised from the cutting position | 0 deg | 0 – 35 |
| Fence height | 22 mm | 14 – 24 |
| Wheel slot width in the base and fence | 5 mm | 4 – 8 |
| Gear module | 1 mm | 0.8 – 1.5 |
| Motor pinion teeth | 15 | 14 – 20 |
| Arbor gear teeth (a multiple of 4 keeps the two pinions in phase) | 40 | 36 – 48 |
| Gear face width | 6 mm | 5 – 10 |
| Added centre distance (backlash) | 0.2 mm | 0.1 – 0.5 |
| Motor body diameter | 24 mm | 20 – 30 |
| Motor body length | 12.5 mm | 10 – 25 |
| Motor shaft length | 9.7 mm | 8 – 14 |
| Motor pocket clearance (snug) | 0.15 mm | 0 – 0.5 |
| 608 pocket clearance (diametral) | 0.2 mm | 0.05 – 0.4 |
| Bore clearance on 8 mm rod parts | 0.2 mm | 0.1 – 0.4 |
| Hole for M3 heat-set insert | 4.2 mm | 3.8 – 4.6 |
| M3 clearance hole | 3.5 mm | 3.2 – 3.8 |
Every value above is a live dimension. Open a model like this in the editor and each one becomes a slider you can drag before exporting.
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