Tools For Lathe And Mill From Shars And Enco

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If you are talking about this type of holder, I'd recommend you never use it for knurling. This style relies on you basically ramming the knurls into the stock, and puts a lot of side load on the spindle. On thin work, you run a high chance of just bending the work piece.


Boring bars for the mill are completely different than boring bars designed for a lathe. trust me you want bars designed for a lathe, even if its just the hss tool bit type.
 
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Yes, that is the tool I'm referring to and now I see your point. I'll put the Enco model back on my list. Included a picture in the post... and I assume the extended arm is there to clamp into the tool holder. I appreciate the help.







Enco Knurling Tool.jpg Enco Knurling Tool.jpg
 
After examining all my tool holders, I understand them better. I noticed the 250-201 (Turning and Facing Holder) and 250-202 (Boring, Turning and Facing Holder) are identical except the 250-202 has a V-Groove along the bottom surface opposite the clamping screws. I read where it's needed to hold a round boring bar, but would there also be a need to hold square inserts at an angle (i.e. to give a different cut)?
 
dave2176 said:
You will still want the scissor knurl. That bump knurl is not good.
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I've used the 'bump' knurl with no problems. Of course, that was on a larger lathe than my Atlas, so it's good to know about a scissor knurl. I'd not seen that approach before. It's clear there's a difference. Good piece of info.

Of course, you can't knurl something very large in diameter with a scissor knurl, it doesn't look like. Or if it gets very large, the scissor knurl effectively becomes a bump knurl. But that would be the minority of jobs, certainly.

Wrat
 
Enco has those scissor knurling tools in 2 sizes... up to 2-1/8"... and 2-1/8" to 4". I like the way all these companies put the dividing line at a point to entice people to purchase both. I'm getting the smaller one which should cover me for the most part. But if/when I need something larger, I'm gambling I can machine something that will space the knurls further apart. :wink:

I'm watching videos about these quick change tool holders and learning a few things. But I'm going to have to make a decision soon on which bits/sets to buy... before my brain explodes.
 
Wait! I just realized this is Sunday so the coupon codes are good until Monday 11:00 PM EST ;)
 
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