12/9/2023 0 Comments T slot bolts 1032I do advise either making or buying some heavy,1/8" thick hardened steel washers to place under the nuts you are tightening down the vise with. I haven't had trouble with the vise walking on the Harrison,and it is a very powerful,geared head mill that can move more metal than the Bridgeport. I had to pay much more for a 3/8" set for my Harrison universal mill because they make fewer sets of those. ![]() Unfortunately,the 1/2" stud size sets are much cheaper than the 3/8" sets because they are made for Bridgeport size machines,and are much more common. I was able to buy the identical set on sale from Enco for about $55.00 several years ago. They had a Teco set at Fastenal that was $250.00. A proper,quality clamp set like a Teco has mjuch better,properly hardened T nuts and studs in it that can take a lot more torque. Their threads get distorted and pulled sideways. If your clamping set has only 3/8" bolts,and the T nuts fit your table,the studs are the maximum size that will fit through your table's slots.Ĭheap T bolts and nuts aren't really as strong as they should be anyway. ![]() Of course,if the T nuts are directly beneath the slots in the vise,as they should be,the studs will only be compressing the cast iron of the table between the T nuts and the vise AS IT SHOULD. How many tons of force do you need to hold the vise down? And,how many tons of force does it take to jerk a hole in your T slot?
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