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Making tommy bars
| Ian Parkin | 12/11/2014 10:13:08 |
 1174 forum posts 303 photos | Hello all
I have a quick job to make some tommy bars for machine adjusting They are 8mm dia with ends reduced to 6 at one end and 4mm at other ends are 24mm long reduced size total length is 150mm
whats the best material to use and any heat treatment that i can do to make them tough against breaking or bending? |
| Jeff Dayman | 12/11/2014 10:52:27 |
| 2356 forum posts 47 photos | Unhardened drill rod / silver steel would be my recommendation. Available, relatively inexpensive, tough, stiff, wear resistant. JD |
| Bubble | 12/11/2014 11:18:36 |
| 75 forum posts 6 photos | Hi all All common steels have essentially the same stiffness, just different yield points. Jim |
| Tony Martyr | 16/11/2014 13:01:42 |
 226 forum posts 45 photos | Ian I have made a couple of ¾" 'pinch bars' for machine moving by using reinforcing steel bar that I got from a building site off-cut pile. The material worked well when it was hot forged and was sufficiently stiff to do the job intended The trick is to make the distance from the thinned blade tip to the heel as short as possible, at the other end I forged a spike to align bolt holes Tony |
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All Forum Topics > General Questions > Making tommy bars