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Hex Bolts Turned from Hex Bar
A hex bolt is hex bar with most of its length turned round and threaded: the part left hexagonal is the head. Held in a three-jaw chuck, the bar's flats become the spanner flats with no further work. Sizes follow ISO 4017; the notebook lists M6 to M10.
These are mild steel bolts. They are not a high-strength grade such as 8.8, which needs heat-treated alloy steel.
Àárín
20 minutes per bolt
Ìlànà
1
1
Sizes
Sizes
Ń ṣí ìwé Jupyter…
2
2
Chuck and face
Chuck and face
Grip the hex bar in the three-jaw chuck with the bolt's length plus head plus 10 mm sticking out, and face the end square.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá onígun mẹ́fà irin rírọ̀0.3 mítàÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ Ìyí Irin
Ìmú ẹ̀rọ ìyípo oníka mẹ́ta
Àpò ohun èlò lathe (HSS)
Gíláàsì ààbò3
3
Turn the shank
Turn the shank
Turn the shank round to a little under the nominal size, for the bolt's length, leaving the head's height plus the parting width as hex. Chamfer the end.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òróró gígé5 mlÀwọn irinṣẹ́ tí a nílò:
Àpò ohun èlò lathe (HSS)
Òṣùwọ̀n Kálípà Díjítà Ìnṣì 64
4
Thread it
Thread it
With the lathe off and the chuck free to turn by hand, start the die square on the shank with oil and cut the thread to the length you need.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Òróró gígé5 mlÀwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ ìgé ihá ìdábùú
Ìdìmú ihá òde5
5
Part off
Part off
Part the bolt off at the head height from the shank shoulder.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀bẹ ìgékúrò lórí ẹ̀rọ ìyíẸ̀rọ Ìyí Irin6
6
Finish the head
Finish the head
Grip the bolt by its shank in soft jaws, face the head and chamfer its corners. Test with a nut.
Àwọn irinṣẹ́ tí a nílò:
Ẹ̀rọ Ìyí IrinÀpò ohun èlò lathe (HSS)
Nọ́ọ̀tì Onígun Mẹ́fà7
7
Troubleshooting
Troubleshooting
Bolt turning troubleshooting.
Flow
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Àwọn ohun-èlò
2- 0.3 mítàÀyè
- 10 mlÀyè
Ìtọ́nisọ́nà yìí ń ṣe
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