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Discussion Starter · #1 ·
Hello All

Just joined. I'm Tom, British but living in Northern France.

I've had a Ferm router for years which I've hardly ever used as it's a very awkward tool to handle and operate. Recently, in desperation, I bought a Chinese made trimmer (new) off of eBay UK. The listing said that the machine came with three collets, 6 mm, 6.35 mm (¼") and 8 mm. I actually received only the 6 mm and 6.35 mm collets together with a split cone with an internal diameter somewhat larger than 8 mm. I have no idea what the purpose of this part is; I've tried fitting it all ways imaginable but without success. It fits into the collet holder but it's far too large for an 8 mm shanked bit. I contacted the seller about the missing part and he was well-meaning and helpful - he refunded 15% of the total price without complaint - but he (and the so-called User's Manual) are next to useless when it comes down to details.

The 6 mm and 6.35 mm collets supplied work well with my few existing bits of that size but almost all the bits I own are 8 mm. I cannot be sure of finding the right part I need - there are hundreds of collet sellers on eBay but I am of the opinion that not one of them really knows what he is selling.

The head diameter of the collets that work is 13.05 mm (say 33/64") and I'm assuming that any suitable 8 mm collet would measure the same or very close. My existing 8 mm collet (for the Ferm) measures 12.20 mm or thereabouts and this sits too far down in the collet holder for the collet nut to be able to compress it sufficiently.

Does anyone know where I might find what I think I'm looking for? And anyone know to what use I might put the cone?

Thanks

Tom
 

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Welcome to the forum, Tom.

Could you post a photo of the head of the shaft and the split cone.

I would not assume that one size fits all, although, as some maintain these items are all made in the same factory, you may be lucky..

I have 8mm collets for some of my cheaper routers that I never use. (1/2" and 1/4" for all my cutters)..
 

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Hi Tom if you have purchased a Katsu trimmer then the split cone collet you have is to secure router bits with a shaft diameter of 3/8" (0.375").
The available range of collets for this router is - 6mm, 1/4", 8mm and 3/8".
 

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Discussion Starter · #5 ·
Hi Tom if you have purchased a Katsu trimmer then the split cone collet you have is to secure router bits with a shaft diameter of 3/8" (0.375").
The available range of collets for this router is - 6mm, 1/4", 8mm and 3/8".
Pinehunter, many thanks. I'm sure you're on the right track. The one I purchased was a Vevor, so called in the listing but on the tool and in the booklet that came with it there is no sign of any brand name. However, I have looked at the Katsu trimmers on eBay and they are identical in every way with the tool I bought. Mine is said to work with bits of 6, 6.35 and 8 mm, no mention of 3/8 inch but your info makes sense. The split cone would accept bits of that size if I had any. Now to the burning question. Where do I get an 8 mm collet to fit? Thanks again.
 

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Discussion Starter · #8 ·
Pinehunter. Thank you, I will.
Tom try a search for Aim Tools. They should be able to provide the collet you need for 8mm shaft router bits. This collet is a similar design to the 3/8" one you have.
Pinehunter. Been on the Aimtools site and found what I'm looking for. Stupid shipping price to France, though. £25!! Thanks for putting me on the right track. Tom
 

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Discussion Starter · #9 ·
Welcome to the forum, Tom.

Could you post a photo of the head of the shaft and the split cone.

I would not assume that one size fits all, although, as some maintain these items are all made in the same factory, you may be lucky..

I have 8mm collets for some of my cheaper routers that I never use. (1/2" and 1/4" for all my cutters)..
James

Thank you very much for your attention to my problem. Happily, it seems that Pinehunter has pinpointed the problem and pointed me in the right direction in order to solve it. Regds Tom
 
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