R8 chuck/holder

through so

Could you not just ream a suitable hole in an R8 blank arbor, and cross drill and tap for the set screw?

AWEM

I suppose that is one alternative worth considering if I can not locate a proper holder.Thanks

A Weldon holder or a plain holder (collet) for 8 and 12mm? You can ignore the Weldon flat. They are held well in collets (ER or the like).

Nick

This R8 stuff is a real learning curve. I'm so used to good 'ole 40int Clarkson's. I dread the thought of ever using the original Bridgeport type of collet, to the point of I only have one, and that came with the machine, and hopefully I have lost it !!! Thanks Bob

Arc Euro. R8 12mm end mill holder 050-090-01100 £10.95 No 8mm listed as it's not a standard size, in metric it goes 6,10,12 and 16

What about holding direct in a collet ?

-- Regards,

John Stevenson Nottingham, England.

Visit the new Model Engineering adverts page at:-

Bob

What about an R8 to ER32 collet chuck and then the collets can be used in other applications. I have found that the Bridgeport's collets are OK is the bloody machine that's not strong enough............................

-- Regards,

John Stevenson Nottingham, England.

Visit the new Model Engineering adverts page at:-

You'll laugh when I tell you I miss my old Victoria V1 (or was it a V2 ? ) mill, strong as an ox !!! I don't want to get into weird collets, like ER stuff on top of R8 and QC 30 on my other mill. I'll get a 12mm from Arc Euro as you suggest, give the good "cheapies" on eBay a go, if that fails, I'll take a deep breath and lay out for proper screwed shank fine pitch rippers from a well known company. Bob

Bob

Nothing weird about ER collets! Just about all I use now apart from 5c and 16c in the lathes. ER collets get used on the manual bridgeport, BT30 holders on the VMC, and even in the turrets of all the lathes.

Use em for milling, drilling or whatever. I mainly use ER16's and 32's.

If your R8's are not gripping then it's not tight enough or worn probably.

Wayne.....

Go for an ER collet chuck.The ER collet with the proper chuck can be used on all machines.Once you have the ER collet chuck you can pick up individual collets so it can hold all your milling cutters and straight shank drills and you will never need to take the chuck out the spindle. I don`t see the benefit of using rippers in a Bridgeport though,it`s hardly got enough power and rigidity to turn an ordinary cutter.In fact I used a Bridgeport I bought to sell for a job once and found I could slow the machine down before I pulled endmills out of an R8 collet. Mark.

Wayne, I use Clarkson's only, never used the one R8 collet that came with the machine. Don't trust them, looks like the cutter can be pushed up into the collet (I will be in touch about the boards over the weekend). Bob

The 2hp motor has pleny of power and go through 6mm plate like a knife through butter. I only use 8mm and 12mm cutters. I wouldnt dream of putting a 32mm through like my old Victoria could

On 7 Mar, 22:36, "Emimec" The 2hp motor has pleny of power and go through 6mm plate like a knife

You have just agreed with me,the Victoria probably only had about a

It has a 3/4 hp on the vertical head, 2 hp on the horizontal. --

Chris Edwards (in deepest Dorset) "....there *must* be an easier way!"

Bob

It's actually more likely the cutter will be pulled from the collet, it's happened to me on a few occasions!

For smaller cutters I quite like the Conventry Toolholder EasyChange system I have. Converts the spindle to something not unlike a QC30, which takes ER16 - ER32 holders. But not a cheap device. I usually only buy holders when J&L have them on offer, which is fairly often.

Wayne...

I don't think you have the right machine in mind, follow this link

Ooops!! wrong link, this is the beast,

I assumed you were referring to the Elliot 'Victoria' --

Chris Edwards (in deepest Dorset) "....there *must* be an easier way!"