New blocks on the kid ?

Hi John S

I am not aware of any advertisers who do parallel shank ER adaptors, certainly I could not find any when I purchased mine a year or more ago.

regards David

For this type of tooling I cannot see the DIY aproach being either time or cost effective. If you follow DC1 suggestion and drill hex and square bar you will only get the level of accuracy that is inherent with material stock, in other words not that great! Certainly it could be drilled or bored to the best of your own ability but the faces, as drawn or extruded, are only hexagon and square in name only (although the angles do total up to EXACTLY 360 degrees). If you are going to the trouble of making precision tooling then the blocks should be ground on all faces.

John, Are your blocks ground all over?

Also, If you ever produce an ER25 version will the AF size of the blocks allow them to sit flat without the nut fouling the table?

Ian

Well, if you didnt sit on s***bay and instead bothered to read the Arc catalogues which are sent with ME and MEW over the past few years, you might have noticed the ER11 and ER16 parallel shank ER adaptors!

The blocks are toughened (not hardened) and ground. We are working on the ER25. To the best of my knowledge, the nut will protrude from the body, based on JS's decision, which he will explain.

John S or Ketan.....just had a look at Arc Euro collet blocks and I notice that the collet nut is available separately. Does this nut have the same thread as the spin indexer? ( I have banjoed mine....don't ask how).

Hi all has anyone noticed that John Stevenson post has the same name as the one in Arc Euro Trade or have i missed something

TY Kevin

Hi Ketan,

Thanks for the info on the ER25 size.

It has been asked already - but cannot be seen in the pictures - are the blocks bored through to allow long stock holding?

Thanks,

John

They are drilled through. Not shown in the pictures but the description in the latest Arc Euro catalogue (Issue 7)

Ian

Yes

Hi Mick,

sorry no, it is a standard nut, which is M40 x 1.5.

the thread on the spin indexer is a finer pitch, but I cant remember what it is.

Yes they are.

Ian, the ER32 blocks are not in the No.7 catalogue, but will be in the No.8 catalogue which will be out soon...hopefully.

I gave my issue 7 catalogue away a couple of weeks ago to a friend who wanted to chose some ballraces. Anyway I clicked on the Arc Euro advert on this forum homepage which shows 'New Catalogue 7 'Out Now'!

The ER32 Stevenson blocks are shown as a new product but obviously only in the online catalogue so I was only a little bit wrong.

Ian

Sorry Ian,

Our advert on this forum needs changing. Catalogue 7 is old now. As soon as we publish our catalogue No.8, we will get get this advert changed...hopefully by around 11th April.

Ketan.

Following up on JJ's post about drill chucks there was an ME article some 15-20 years ago about mounting a chuck between 2 squared up plates by turning a shoulder on each end. I got as far as finding the hardened chuck didn't wish to cooperate with my HSS tools.

When you think about it there is potential for MT2 and MT3 blocks to hold the collets and devices to that standard.

Oh Poo

After waiting several months to compile an order just days later, after I submit it, something else I'd like turns up!

Never mind, here comes another order Ketan

Paul

Put me down as another vote for ER-25!

Geoff

Parallel shank ER holders are available at : -

http://www.glostertooling.co.uk/Download/Engineers%20tool%20catalogue.pdf

These blocks are very nice just had a pair delivered from Arc EuroTrade, no more getting out & setting up the dividing head to machine that replacement for your lost chuck key.

Paul