Are some die grinders 6.0mm and some 6.3mm?

[rcx132]

Has anyone else noticed a problem? My die grinder has a 6.0mm chuck but most bits seem to be 6.3mm and don't fit.

 

[gordon stephenson]

The shanks on the larger size will be 1/4"
P.S. you are 0.002" out on your measuring,

 

[Paul.]

Mine has 2 sets of collets to convert between metric and imperial, burrs and flapwheels with shafts 1/4" (6.35) tend to be far more common than the metric ones but I notice there are more 6mm ones around nowadays, you'll just have to be careful what you buy if you only have a 6mm collet, or buy another die grinder...

 

[rcx132]

Mine has 2 sets of collets to convert between metric and imperial, burrs and flapwheels with shafts 1/4" (6.35) tend to be far more common than the metric ones but I notice there are more 6mm ones around nowadays, you'll just have to be careful what you buy if you only have a 6mm collet, or buy another die grinder...

That's the ideal solution. Mine came with the 6.0 mm collet so I can't use some tools like the "Magic stripper" tool which has an imperial shank. Just spoke to a machinist, he said he'll see about grinding mine out to 6.3mm. He also said he could make a collet but aren't these things hardened?

 

[gordon stephenson]

They will be hardened, But mild steel would be fine, As long as they are tightened firmly so that there is no slipping/wear taking place,

 

[123hotchef]

mine has 2 collets too

 

[WorkshopChris]

I have had this problem many on line sellers list as 6mm / 1/4" on the same item.

 

[normspanners]

I 've ended up with loads of different collets over the years, most are universal you can buy the various collets from likes of snap-on etc

 

[rcx132]

I 've ended up with loads of different collets over the years, most are universal you can buy the various collets from likes of snap-on etc

I bought a spare one and the outer diameter didn't match. Most collets on ebay just list the die grinder that they fit, and not the full dimensions. I will have to message the sellers to find out.

 

[ronan]

The die grinder i bought came with two collets, 1/4" and a 6mm. Very handy.

 

[normspanners]

The die grinder i bought came with two collets, 1/4" and a 6mm. Very handy.

that is how I have ended up with so many I wanted a few options and it was as cheap to buy a cheap grinder to get the various collets as buy them separately I used the cheap grinder with a flat wheel or flap sanding wheels therefore the bearing dont need to be as good as using the tungsten cutters the cheapo came with at least 4 collets so made it cheaper than buying snap-on collets .


here are a set http://www.ebay.co.uk/itm/NON-Genui...939421?hash=item43f36ee31d:g:nPoAAOSwgZ1Xshqg

 

[rcx132]

that is how I have ended up with so many I wanted a few options and it was as cheap to buy a cheap grinder to get the various collets as buy them separately I used the cheap grinder with a flat wheel or flap sanding wheels therefore the bearing dont need to be as good as using the tungsten cutters the cheapo came with at least 4 collets so made it cheaper than buying snap-on collets .


here are a set http://www.ebay.co.uk/itm/NON-Genui...939421?hash=item43f36ee31d:g:nPoAAOSwgZ1Xshqg

I bought those and the outer is the wrong size :/

 

[normspanners]

up's

 

[graffian]

No one else have a rubber collet?
Mine takes 1/4" and 6mm.

 

[Dieselman 63]

I have had this problem many on line sellers list as 6mm / 1/4" on the same item.

Very annoying isn't it? I had to buy some 1/4 and 1/2" round bar and got 6 and 13mm

 

[mechman]

I think a lot of people automatically take 6mm as 1/4" and it isn't, thereby lies a little problem, it's only a few thou but nonetheless a problem.

 

[gordon stephenson]

The actual difference in diameter is just over 0.013" , At 73 thou it wouldn't even be a rattling good fit,

 

[rcx132]

The actual difference in diameter is just over 0.013" , At 73 thou it wouldn't even be a rattling good fit,

I don't measure in thous but I know that the 1/4" bits absolutely won't fit into my die grinder!

 

[ronan]

I find even with milling collets, if the cutter isn't a pretty good fit to start with, when its tightened up in the chuck or spindle, it doesn't grip very well at all.