Improving Drilling Accuracy after Center Punching

[mklotz]

The machine tool company
you referred doesn’t carry 916” slot nuts, must be an oddball size?

MSC has them...

https://www.mscdirect.com/product/details/73154338

For light duty, it's possible to make a serviceable T-bolt from a carriage bolt; just grind the head to fit the T-slot.

[jjr2001]

Douglas, try this link to McMaster-Carr....They have just about everything.

https://www.mcmaster.com/#t-slot-nuts/=1b9sgo9

Dimensions are listed.

Cheers, JR

[jjr2001]

Thanks Marv, excellent reminder for the carriage bolt mod. I have made a few of them in the past.

Douglas, I was on the LMS site this morning and did a search on T-Slot-Nut and found the 7/16 and quite a few other sizes.
https://littlemachineshop.com/produc...rm=t-slot-nuts

The also list a 7/16 slot cleaner which is easy to make and cleans out all the swarf not just the steel!

Cheers, JR

[Douglas Rome]

I was about to order 4 9/16” slot nuts from MacMaster, I think about 12bucks,
nowhere on their website did it say how much shipping was, I had to call them!
Turns out they wanted $6 to mail, so I declined. Too much for a little shipping
envelope. Thanks douglas

[Douglas Rome]

Here’s what I ended up ordering.
Thanks. Douglas

[jjr2001]

If you are using 3/8-16 bolts then LMS has 1/2" T-Slot-Nuts that may work ok in your 9/16 slots.
Only $1.49 each and they usually ship small orders by mail. I have had shipping as low as $3.00
from them on a small order.

https://littlemachineshop.com/produc...2021&category=

Cheers, JR

[jjr2001]

Here’s what I ended up ordering.
Thanks. Douglas

Ok, I posted prior to seeing your post. Those are light duty but should work in low stress applications.

Cheers, JR

[Douglas Rome]

I plugged in qty 4 in LMS and their lowest was 1st class mail $4.45. Thanks, douglas

[Douglas Rome]

Here’s what I ended up ordering.
Thanks. Douglas

I got them a couple days ago. They are “tiny”, too tiny to use, we’ll see.
Thanks. Douglas

[jjr2001]

Well that is unfortunate. If they are large enough so they don't rotate in the slot you
could use a washer on each one that would be large enough not to pull thru the slot?

I suppose another quick fix would be to solder the washer to the "nut" placing the washer
above the nut? Light duty but might work in a pinch.

Cheers, JR