Adapter Collet

[rleete]

What do you do when you have a metric cutter, but no collets that fit?  You make an adapter to fit a collet you do have.  Dovetail cutter is 12mm, and the 1/2" collet wouldn't hold it tightly enough.  I whipped up this aluminum adapter, bored to size.  Worked well until the Chinesium cutter decided to shed a tooth.  To be fair, I was cutting some pretty hard tool steel.

   

   

   

[EdK]

At least you tried.

Ed

[Vinny]

I looked at the Chinesium dovetail that I bought online and couldn't believe what I saw. I'm surprised it cut anything at all. The cutting edges had pits in them and a couple barely had an edge. When I got some cutters in an auction of a machine shop I looked at a dovetail from that lot. No pits, all good clean and sharp edges. It cuts really well.

[EdK]

I learned a long time ago that it's not worth skimping on cutting tools.  

Ed

[Highpower]

(11-19-2024, 05:56 PM)rleete Wrote: What do you do when you have a metric cutter, but no collets that fit?

I buy an ER collet set that has the clamping range to fit imperial AND metric cutters of course.

Vinny: I have a pair of Chinesium Morse taper reamers, #2 & #3. Neither will cut ANYTHING. There is absolutely zero relief angle ground behind the cutting edges. All they do is rub because the back side of the flutes stick out as much as the (so called) cutting edges. Worthless.

[rleete]

My mill is MT3. Grizzly stopped making them and switched over to R8. I'd love a set of ER collets, but I'm too cheap to spend that kind of money right now.

[Vinny]

(11-20-2024, 01:03 AM)Highpower Wrote:

(11-19-2024, 05:56 PM)rleete Wrote: What do you do when you have a metric cutter, but no collets that fit?

I buy an ER collet set that has the clamping range to fit imperial AND metric cutters of course.  

Vinny: I have a pair of Chinesium Morse taper reamers, #2 & #3. Neither will cut ANYTHING. There is absolutely zero relief angle ground behind the cutting edges. All they do is rub because the back side of the flutes stick out as much as the (so called) cutting edges. Worthless.  

I also use ER. Now that you mention it, I also have a set of morse 2 (rough and finish) reamers and a BS9 reamer. Still wrapped. I should prolly look at them to make sure they're not like yours!

[Highpower]

(11-20-2024, 11:09 AM)rleete Wrote: My mill is MT3.  Grizzly stopped making them and switched over to R8.  I'd love a set of ER collets, but I'm too cheap to spend that kind of money right now.

Well then, I guess you just aren't old enough yet to realize that you can't take it with you when you are dead.

https://www.amazon.com/Precision-Spanner...B07CJ7NFLL

[rleete]

Man, you're making it really hard not to spend money.

[Highpower]

(11-20-2024, 07:38 PM)rleete Wrote: Man, you're making it really hard not to spend money.

Come over to the dark side Luke....  

Hey I get it. Some of the people on this forum have 'made me' spend more money than I care to think about. But there have been plenty of times I regretted buying cheaper tooling and ended up having to purchase better tools anyway to get decent results. I have a good quality MT3 reamer now that cuts like a hot knife through butter. The cheap reamers I bought have been collecting dust since the first time I tried to use them. If I'm going to spend any money at all I would prefer it didn't go to waste afterward.