02-02-2022, 01:04 PM
(This post was last modified: 02-02-2022, 01:07 PM by Hedd_Jones.)
just some tips from someone who does this sort of thing regularly.
Find a long bolt with the necessary thread and a suitable length plain portion.
Bolt grade is probably a touchy subject, particularly if your mad keen for 590lbft (or whatever) on your torque wrench. Or you do the nuts up with the ugga dugga. I'd say you need a decent one rather than one made in 'chinesium'. To be honest a Whit bolt is likely to be decent material in anycase.
I'd lop the head off and put that end in the chuck.
Protect the threads you want to use, I put 2 nuts on locked together. I use these also as a stop for the file. This means you will be able to file all way to the threads without damaging them, and will not end up with any plain bit sitting above the block deck, nor need to slightly east the upper part of the hole.
You need obviously need to file the plain portion to 5/16, I use a shitty old U/S digital caliper as a gauge. Use an existing head stud to set the size. But use what you like.
Filing between the nuts and the chuck may lead to damage to your chuck. I usually leave the bolt over length and use tape to identify the limit you need to file to at the non threaded end.
Use a good sharp file. A flap disk in the grinder is excellent tool for roughing out. Its also quite exciting. Use at your peril. Bear in mind the drill will have a fair bit of slop doing this, and be carefull not to put too much pressure as you don't want to bend the prospective stud. But this is far easier than it sounds. I found a moderate speed best.
And a nice sharp split die with loads of lube to cut the threads. Have it pretty 'open' to cut a nice tight thread. Basically use the head nut as a gauge.
Cut to length at both ends. The flap wheel in the grinder is also excellent at putting a nice pro style chamfer or dome on the top end to match your others. Don't do it in the vice, roll the stud between your fingers against the flap wheel.
Fitting a stepper stud in the block, unless your super anal with your thread lengths on the big end, you will find to set depth you will need to glue it in, rather than do it up till its tight. The proviso of course is you have sufficient thread engagement.
Find a long bolt with the necessary thread and a suitable length plain portion.
Bolt grade is probably a touchy subject, particularly if your mad keen for 590lbft (or whatever) on your torque wrench. Or you do the nuts up with the ugga dugga. I'd say you need a decent one rather than one made in 'chinesium'. To be honest a Whit bolt is likely to be decent material in anycase.
I'd lop the head off and put that end in the chuck.
Protect the threads you want to use, I put 2 nuts on locked together. I use these also as a stop for the file. This means you will be able to file all way to the threads without damaging them, and will not end up with any plain bit sitting above the block deck, nor need to slightly east the upper part of the hole.
You need obviously need to file the plain portion to 5/16, I use a shitty old U/S digital caliper as a gauge. Use an existing head stud to set the size. But use what you like.
Filing between the nuts and the chuck may lead to damage to your chuck. I usually leave the bolt over length and use tape to identify the limit you need to file to at the non threaded end.
Use a good sharp file. A flap disk in the grinder is excellent tool for roughing out. Its also quite exciting. Use at your peril. Bear in mind the drill will have a fair bit of slop doing this, and be carefull not to put too much pressure as you don't want to bend the prospective stud. But this is far easier than it sounds. I found a moderate speed best.
And a nice sharp split die with loads of lube to cut the threads. Have it pretty 'open' to cut a nice tight thread. Basically use the head nut as a gauge.
Cut to length at both ends. The flap wheel in the grinder is also excellent at putting a nice pro style chamfer or dome on the top end to match your others. Don't do it in the vice, roll the stud between your fingers against the flap wheel.
Fitting a stepper stud in the block, unless your super anal with your thread lengths on the big end, you will find to set depth you will need to glue it in, rather than do it up till its tight. The proviso of course is you have sufficient thread engagement.