Aloris #6 Toolholder Q- What's This Bolt For?

Thanks for all the replies guys!

-In reply to above (I don't know how to multi-quote from my phone):
This is a DTM holder, not Aloris. Made is NJ, USA :)
- I can only gather it is either to relieve strain or the tool-stop idea, although the normal toolholder does not require a stop?
The tool strain idea my seem far-fetched, but assuming one actually uses two tool simultaneously, the outer tool may be more likely to come loose? Maybe?

The bolt up through the the bottom is totally removable.

Also, wondering if it's coming up from the bottom is a clue?

Bernie
 
It’s to help reduce the spreading of the slot, that’s all. Aloris also used this engineering on there much longer tool holder that has a slot going down the whole length of the holder. When you wrench down on the set screw(s) you can apply a lot of pressure that can easily spread the slot apart. The Aloris holder in the pic below has 3 of those bolts. If you tighten down on the set screws(s) and the holder spreads, then the cutter will be loose in the holder. No matter how tight you make it, the holder would keep spreading more if there was no bolt(s). Oh, and by the way, I like using this holder in the pic when I do large face plate type work. It allows me to easily get to the large OD’s that are close to the head stock…Dave.


aloris2.JPG
 
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chips&more said:
It’s to help reduce the spreading of the slot, that’s all. Aloris also used this engineering on there much longer tool holder that has a slot going down the whole length of the holder. When you wrench down on the set screw(s) you can apply a lot of pressure that can easily spread the slot apart. The Aloris holder in the pic below has 3 of those bolts. If you tighten down on the set screws(s) and the holder spreads, then the cutter will be loose in the holder. No matter how tight you make it, the holder would keep spreading more if there was no bolt(s). Oh, and by the way, I like using this holder in the pic when I do large face plate type work. It allows me to easily get to the large OD’s that are close to the head stock…Dave.


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Thanks a lot Dave,

I suspected something like that. Thanks for confirmation! It would've bugged me for a while wondering if there was something else I should've been or could have been doing with it. Even if I didn't need to, it's great to know these things.

Bernie
 
kd4gij said:
Where I used to work we used 2 tools in a # 6 holder for a part we ran in batches. One pass and done.
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Thanks Kd

You made me curious about how you would set the tools are accurately at the same time relative to each other? Would someone do that on the surface plate and a height gauge or something or premeasured blocks?

Bernie
 
Ours where set on a comparator. A height gauge on a surface plate would work also.
 
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