Thread: Using a surface grinder but not for surfaces

Originally Posted by Michael G

Yes. In reality you are using the transfer block to extend the field of the chuck, so as Ewan points out, you want the iron laminations and the mag chuck to match for maximum effect

My chuck is a coarse pole affair too. I want to make some transfer blocks. What sdort of 'iron' would be suitable for the laminations, given that the pole spaings are on 3/4" centrelines and the 'gaps' are 3/16"?
Should I be using 5/8" iron and 3/16" brass laminations?

Well, thanks for the explanation about magnetic chucks, field lines and flux! Oh, and stand on the RHS…. I writing all this down!

So, what happens when you want to grind a non magnetic material? Is it the norm to suer glue the item to the chuck?

Sorry Michael, I hope I'm not hijacking your thread!

Simon

Hi Simon,
You could drop an engineers vice on the chuck and clamp it in that.

Phil

It's normal to attach the non-ferrous thing to something that is, so as Phil suggests, put it in a vice.
Superglue to a steel plate is another way. It depends on how much heat is being generated during grinding. As long as the attaching media is not going to soften with heat or dissolve with coolant you should be fine.
Another possibility if you have several things to grind is a steel form that the non-ferrous parts can be mechanically held into. (Grub screws or springs or...)
On the end (and possibly the side) of most mag chucks near the clamping surface are a couple of tapped holes. These are so you can bolt a strip with some slotted holes (for vertical positioning) to the side of the chuck. It makes a stop so that there is less tendency for work to shoot off.

Michael

Originally Posted by simonl

............wrt the transfer blocks, I didn't even think of the fact that it's gripping something that's not parallel to the chuck. I'm amazed it works at all, (quite impressive) but then I have no experience with such items (Yet). I have noticed that CTC tools has some that are quite reasonable. I've never had a need for them in the past but considering them now...

Simon

Hello Simon,

I have searched CTC's site for transfer blocks and have come up empty handed. Tried all permutations of magnetic, transfer, parallel and block to no avail. Sure it was CTC?

Bob.

http://www.ctctools.biz/servlet/the-...tes/Categories

I have a set... I did umm and ahh for a long time over getting a set of two from CTC, given the freight price.. But they are OK quality..

Well, I can't blame my glasses. Thank you Richard.

I wonder if they might be too large?? The mag vice Peter Fou gave me for the T and C grinder is about 8" x 4".

Bob.

Originally Posted by .RC.

http://www.ctctools.biz/servlet/the-...tes/Categories

I have a set... I did umm and ahh for a long time over getting a set of two from CTC, given the freight price.. But they are OK quality..

How much was the freight Richard? I just ordered some used V and transfer blocks from the US, thanks to Michael's eagle eyes. I'm NOT looking forward to my credit card bill this month, but I guess it's consolation for all the hours I'm working!

I think they were around the US$50 delivered...

I looked for a set locally for quite awhile.... Then as usual, within a couple of months a set of 4 larger transfer blocks turned up locally for $100.... So I got them as well..

The CTC ones needed a lick on the SG to get them right... As like most stuff from CTC, it is like a kit, you buy it, then tweak it back to a usable product... Eclipse it is not..

Oh that's not too bad. I was going to put in a order through CTC and combine it with a few other things to amortise the postage costs a little, nothing fancy, just some carbide blanks etc etc, but the guy selling these got back to me again. He seems like a nice guy so I just bought them from him http://www.ebay.com.au/itm/331344165...84.m1423.l2649

Michael I really hate you

Good to see you found them in the end Bob! Visited the website so see if I was going crazy and see how much the freight was. Total cost is about A$80. I see there are a few on ebay US but postage would be the deciding factor as usual. Im keen to dig out that thread when Ueee made his own.

Simon

Originally Posted by Anorak Bob

Hello Simon,

I have searched CTC's site for transfer blocks and have come up empty handed. Tried all permutations of magnetic, transfer, parallel and block to no avail. Sure it was CTC?

Bob.

I also have some I bought from CTC thinking they were 123 blocks. They are not required.

Dean

Originally Posted by Oldneweng

I also have some I bought from CTC thinking they were 123 blocks. They are not required.

These ones?
http://www.ctctools.biz/servlet/the-...ECISION/Detail

Michael

Here are 2 fixtures that I use, similar to others posted earlier with hopefully useful details. 6° is what I use.grinding fixture 1.jpggrinding fixture 2.jpggrinding fixture 3.jpgThe second picture shows a scale placed under the end of the fixture evenly at the 1/8" mark to provide side clearance.