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Best Source for Craftsman 618 T-Slot Nuts?

MDof2

Iron
Registered Member
#1
Anyone recommend a reasonable source for t-slot nuts for a Craftsman 618? Trying to mount my QCTP on my lathe and I'm lacking a mill to make said part :)

I'd hope to not pay 15 bucks for one on ebay if I can avoid it.

Many thanks.
 

chips&more

Active User
Active Member
#2
Welcome, I understand the pain of buying something simple that could be made in the home shop. But, 15 bucks is not that bad if you do not have a mill and need the part…Dave.
 

Randall Marx

H-M Supporter - Premium Content
H-M Supporter-Premium
#5
I made mine from a chunk of steel, drilled and tapped to fit the toolpost stud, hacksawed and filed to fit the slot in my compound. Been working well for over a year. :D
 

MDof2

Iron
Registered Member
#6
The one from Little Machine Shop worked for me - $9.95 bought separately, or as part of a QCTP package 4058:
http://littlemachineshop.com/products/product_view.php?ProductID=5571&category=
and
http://littlemachineshop.com/instructions/4058Mounting0XAQCTP.pdf

"...fits Atlas/Craftsman lathes with a 5/8" or 3/4" T-slot. This T-slot nut fits most Atlas/Craftsman lathes."
Thank you. I did come across that one after some further googling. Didn't know if there were other sources as well. Thank you again.
 

wa5cab

Downloads Moderator
Staff member
H-M Supporter-Premium
#8
No, he was referring to making a nut that when finished has two external diameters. The larger diameter would slide through the wider area at the base of the slot (the bottom cross-bar of the inverted tee,. The smaller diameter will slide through the vertical part of the tee. The danger in using this (and also the one drawn above) is that the clamping area is very short, and is prone to breaking out the top of the compound. The same thing can happen if you use an available clamping nut. Generally, the length of the T-nut for compound service in a cast iron compound should be about three times the width.
 

MDof2

Iron
Registered Member
#9
Thanks for the input. I made a beer trade with a buddy who has a mill to make me a foot or so of blank t-slot which I can cut to length, and tap to fit my clamping bolt of choice.
Thanks again all for the input.
 

rolleikin

Iron
Registered Member
#10
Anyone recommend a reasonable source for t-slot nuts for a Craftsman 618? Trying to mount my QCTP on my lathe and I'm lacking a mill to make said part :)

I'd hope to not pay 15 bucks for one on ebay if I can avoid it.

Many thanks.
McMaster-Carr has tons of t-nut for any application and of any kind of material (almost), but your best bet is to measure your t-slot and make exact nuts for your machine.

Sent from my SAMSUNG-SM-T217A using Tapatalk
 

wa5cab

Downloads Moderator
Staff member
H-M Supporter-Premium
#11
Unfortunately, unless you found some specialty ones instead of just the standard T-nuts, McMaster doesn't have anything safe to use. They are all too short and mostly too narrow for safe use on Atlas compound slides. No one wants to have a crash. But if you do, far better to break a gear tooth than the compound slide. The T-nut width should fill the slot. And the length should be about the width of an AXA tool post.