MAN4MACHINETr46 x 8
Trapezoidal
A 30 degree trapezoidal thread built for pushing or pulling load along an axis -- lead screws, jacks, vises -- rather than for clamping two parts together. Its basic profile (ISO 2904) is unrelated to the 60 degree M/MJ formula: a flat-topped trapezoid with a small diametral crest clearance rather than a sharp-V truncation.
- Standard
- ISO 2904 / DIN 103
- Flank angle
- 30° included
- Pitch
- 8.00 mm
Thread profile
A 30 degree included flank angle.
Basic major 46.000 mm, pitch diameter 42.000 mm, minor diameter 37.000 mm -- theoretical dimensions at zero allowance, before any tolerance class is applied.
Trapezoidal sizes
| Designation | Pitch | Major Ø | Pitch Ø | Minor Ø |
|---|---|---|---|---|
| Tr8 x 1.5 | 1.50 mm | 8.00 mm | 7.250 mm | 6.000 mm |
| Tr9 x 2 | 2.00 mm | 9.00 mm | 8.000 mm | 6.500 mm |
| Tr10 x 2 | 2.00 mm | 10.00 mm | 9.000 mm | 7.500 mm |
| Tr11 x 2 | 2.00 mm | 11.00 mm | 10.000 mm | 8.500 mm |
| Tr12 x 3 | 3.00 mm | 12.00 mm | 10.500 mm | 8.500 mm |
| Tr14 x 3 | 3.00 mm | 14.00 mm | 12.500 mm | 10.500 mm |
| Tr16 x 4 | 4.00 mm | 16.00 mm | 14.000 mm | 11.500 mm |
| Tr18 x 4 | 4.00 mm | 18.00 mm | 16.000 mm | 13.500 mm |
| Tr20 x 4 | 4.00 mm | 20.00 mm | 18.000 mm | 15.500 mm |
| Tr22 x 5 | 5.00 mm | 22.00 mm | 19.500 mm | 16.500 mm |
| Tr24 x 5 | 5.00 mm | 24.00 mm | 21.500 mm | 18.500 mm |
| Tr26 x 5 | 5.00 mm | 26.00 mm | 23.500 mm | 20.500 mm |
| Tr28 x 5 | 5.00 mm | 28.00 mm | 25.500 mm | 22.500 mm |
| Tr30 x 6 | 6.00 mm | 30.00 mm | 27.000 mm | 23.000 mm |
| Tr32 x 6 | 6.00 mm | 32.00 mm | 29.000 mm | 25.000 mm |
| Tr34 x 6 | 6.00 mm | 34.00 mm | 31.000 mm | 27.000 mm |
| Tr36 x 6 | 6.00 mm | 36.00 mm | 33.000 mm | 29.000 mm |
| Tr38 x 7 | 7.00 mm | 38.00 mm | 34.500 mm | 30.000 mm |
| Tr40 x 7 | 7.00 mm | 40.00 mm | 36.500 mm | 32.000 mm |
| Tr42 x 7 | 7.00 mm | 42.00 mm | 38.500 mm | 34.000 mm |
| Tr44 x 7 | 7.00 mm | 44.00 mm | 40.500 mm | 36.000 mm |
| Tr46 x 8 | 8.00 mm | 46.00 mm | 42.000 mm | 37.000 mm |
| Tr48 x 8 | 8.00 mm | 48.00 mm | 44.000 mm | 39.000 mm |
| Tr50 x 8 | 8.00 mm | 50.00 mm | 46.000 mm | 41.000 mm |
Designation calculator
Try “M12x1.5-6g”, “M8” (coarse pitch assumed), “MJ6-4h6h”, or “Tr20x4-8H”. Add “-LH” for a left-hand thread.
Trapezoidal threads use their own ISO 2904 tolerance grades (e.g. 7e/8e external, 7H/8H internal), a separate system from the ISO 965-1 grades this calculator computes for M and MJ. Basic dimensions only, below.
Calculated live
Basic dimensions
- Major diameter
- 46.000 mm
- Pitch diameter
- 42.000 mm
- Minor diameter
- 37.000 mm
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