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Thread: Sanity check on this cutter...
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25th Jun 2020, 10:37 PM #1Most Valued Member
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Sanity check on this cutter...
Digging in the shed tonight I came across this big insert cutter that I got with some other tools in a mixed lot ages ago. Around 200mm diam so far too big and scary for my old mill but might be able to use it on the TOS.
I’m not familiar with them, but looks like a slotting cutter for a horizontal arbor that may have been used as a face mill as the alternate inserts look like they are on the wrong side.
What does the brains trust think?
Steve
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25th Jun 2020, 10:45 PM #2Most Valued Member
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Yeah it's a big insertable side and face cutter, no idea how you would run it as a Facemill but it does look like someone tried.
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25th Jun 2020, 11:22 PM #3Most Valued Member
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Those inserts look as if they would be under a lot of load set as they are, the holder looks to be more a staggered tooth side and face cutter.
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26th Jun 2020, 01:18 AM #4Most Valued Member
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Any idea what the standard method is to line the inserts up with each other when I move them to the other side?
I haven't removed one yet, but doesn't look like they are indexed axially.
Steve
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26th Jun 2020, 01:42 AM #5
Hi Steve, Guys,
I would think that the inserts would be set from the side face of the disc using a stop block. Basically a piece of steel with a slot that fits over the insert with a flat face and a screw and locknut to set the amount of protrusion of the insert with reference to the side. The height of the insert should be set by the bottom of the recess that the insert sits in.
A similar method is used to set moulder blades.
Setting Tool.png
Edited to add drawing.Last edited by BaronJ; 26th Jun 2020 at 05:46 PM. Reason: edited to add drawing
Best Regards:
Baron J.
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26th Jun 2020, 09:10 AM #6Golden Member
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I would be more inclined to set the head up on an arbour between centres and use a dti to test the side projection. the depth should be set in the locating slot if it was milled accurately.
Ken
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26th Jun 2020, 09:06 PM #7Most Valued Member
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That is a bit of a beast, it looks like something you could make use of on a home built a stump grinder.
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27th Jun 2020, 11:42 AM #8Member
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A simple and reasonably accurate way of setting:
Mount cutter on a vertical spindle
Take a light cut (2mm+) on a scrap piece of metal.
Invert the cutter on the spindle.
Move the cutter over the machined surface.
Release the required insert (those that are offset from the wedge clamp)
Slide insert down to the machined surface and tighten wedge,
Repeat for every alternate insert.
Col
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30th Jun 2020, 06:27 PM #9
They use large cutters like that to skim and level cylinder heads.
Someone obviously thought they could do that with this one. Trouble is that now every second insert has extreme negative take and would just run the surface cut by the pressing tooth.
Should be ok for slot milling once you've shifted the inserts where they belong.
Cheers
JoeCheers, Joe
retired - less energy, more time to contemplate projects and more shed time....
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30th Jun 2020, 09:12 PM #10Most Valued Member
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When I looked closer while changing the inserts to the correct side, each position is marked with a dot on the side the insert should protrude.
At the moment I’ve just put them in the correct side as I don’t have a 1-1/2” arbor to drive them. Will probably make a keyed bush to go on a 30mm one.
Joe - I think these are the face mills you’re describing for skimming heads etc
Steve
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1st Jul 2020, 06:30 AM #11
Hi Steve, Guys,
Some mean looking cutters there ! Their going to need some HP to drive them !Best Regards:
Baron J.
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1st Jul 2020, 02:30 PM #12Most Valued Member
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They would definitely need a bit to drive them at whatever maximum material rate they are capable of, but thinking that as a flycutter on steroids taking light cuts I might be able to use them. The TOS spindle is 3kW so would likely handle a half decent cut anyway.
I picked them up at the same action I got the slotting cutter at. The new price for something similar is pretty serious and then you're looking at huge number of inserts and $$$ to be able to use it!!
Its always a good bit of machining to look at the online promo videos of these sorts of cutters running.
Not high on my todo list, but when I get a chance I'll sort out an arbor and give one a run just to see what its like. Having something nice to face old cast iron cylinder heads would be useful
Steve
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1st Jul 2020, 02:44 PM #13Member
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1st Jul 2020, 06:50 PM #14
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1st Jul 2020, 11:38 PM #15Most Valued Member
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It definitely sets them radially, but not axially. The face and back of the inserts is completely flat, so they are free to move from the wrong side of the cutter all the way across until they fall out the correct side.
Once I've sorted out something to mount it on I'll use the method you suggested earlier to set them.
Steve
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