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ISO 53 basic-profile gear rack, module 2.5
ISO 53 basic-profile gear rack, module 2.5: 20 teeth (157.08 mm long), 20° flanks, tips 2.5 mm above the pitch line, roots 3.125 mm below (whole depth 5.625 mm), root radius 0.950 mm, tooth thickness = space width = 3.927 mm on the pitch line; the pitch line is 8.125 mm above the back face, the bar is 15 mm wide and has no holes: length, width and body depth below the root are examples (not from the standard), the tooth numbers are the standard's
Exact dimensions. True size, no tolerance added. Threads are plain cylinders at the major diameter.
STEP STL free, CC BY 4.0 (credit "Xem Studio")
Dimensions
| module m, mm | 2.5 |
|---|---|
| tooth pitch p = π m, mm | 7.854 |
| tip height above pitch line (m), mm | 2.5 |
| root depth below pitch line (1.25 m), mm | 3.125 |
| whole depth (2.25 m), mm | 5.625 |
| tooth thickness = space width on the pitch line (π m / 2), mm | 3.927 |
| root radius 0.38 m, mm | 0.950 |
| travel per turn of a 20-tooth pinion (π m 20), mm | 157.08 |
| pitch per tooth, mm | 7.854 |
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Gear racks ISO 53 module 1 to 3: tooth profile, pitch, depth and root radius + module 1.5, 2.5, 3 rack STEP/STL: every size, notes, mating features and sources. What is the tooth profile of a standard gear rack (module 1, 1.5, 2, 2.5 or 3): pitch, tip height, root depth, tooth thickness and root radius?