Mag Transfer Block

**RayG** · 6th October 2012, 12:19 AM

I've got several hundred chisels and plane blades to grind, and while I could set up a sine table, there is still the problem of registering and holding the parts accurately.

I decided to make a 25 degree mag transfer block, bascically it's just a laminated brass and steel block, and made to suit the pitch of the magnetic poles on the surface grinder chuck.

It's 300 mm long, ( so I can do 4 or 5 plane blades at a time. )

I started by roughly bandsawing out all the parts and drilling to take 3/8" threaded brass rod. ( and yes, before you ask it took forever

)

All the steel parts were surface ground ( makes them look pretty

) but mainly, I needed to get the pole spacing right and anyway it provides a nice clean surface for soldering
All parts are then spread with flux and solder paste, I would have like to use a hard solder, but this is the stuff I had on hand.

Assemble with the threaded rod

Into the furnace and bake at 325 C for a few hours... ( I did a few test pieces first

)

After cooling overnight, it's onto the sine table at 25 degrees for the initial clean up on the mill

And after a bit of a clean up, I can start measuring to make sure it's square and parallel before it goes onto the surface grinder for finish grinding.

So, that's as far as I've got today, more pictures to come when I get it finished.

Still pondering how to measure the thing?

Regards
Ray

**Ueee** · 6th October 2012, 01:29 AM

Nice work Ray

I would be interested to know more about the solder you used.

**Scott** · 6th October 2012, 10:16 AM

Watching with interest

**Anorak Bob** · 6th October 2012, 03:38 PM

The usual Ray Gardiner impressiveness.

BT

**Steamwhisperer** · 6th October 2012, 04:06 PM

I love the way you make a difficult and at the least expensive problem easy. Watching with great interest Ray.

Phil

**RayG** · 6th October 2012, 05:46 PM

Thanks SJT, BT, I'll be finished the cleanup and surface grinding later today.

Hi Phil, you are right about the expensive bit, ( not sure about the difficult bit

) you can get the smaller fine pitch mag transfer blocks at reasonable prices, but as soon as the size goes up the prices get ridiculous.

Hi Ewan, the solder paste is the stuff used for soldering SMT components ( I have a small infrared reflow oven for doing prototype boards ) you can get lead free, but the stuff I've got is the normal tin/lead. It has a flux of some sort mixed in with the paste. Japan Flux Grease Gel Repair Solder Paste MK-50L 500g | eBay

What I'd really like, is to find some silver solder paste, to try a bit of proper furnace brazing...

Regards
Ray

**RayG** · 8th October 2012, 01:29 PM

After mucking about for a day working out the setup, I finished the grinding on the mag transfer block.

Setup for 25 degrees..

Setting up for grinding the short side at 65 degrees ( finally got to use the extensions on the planer gauge

)

Half way through grinding the short side, if you look closely you can see how far out the mill was..

Yes, I know digital angle gages aren't all that accurate, but I did measure the side lengths and it's 25 degrees plus or minus 0.02 degrees

Now that I know I can make custom mag transfer blocks as required, I'm thinking I'll make some more..

Regards
Ray

**Anorak Bob** · 8th October 2012, 01:45 PM

Looking good Ray.

I'm glad you found a use for the shaper gauge. They are handy things to have even if you don't own a shaper.

I can overcome the envy I have of your ownership of the mag sine base by knowing it's simply too big for any of my machines.

BT

**Abratool** · 8th October 2012, 02:27 PM

Ray
It all looks good.
I like the idea of the solder.
The ones I made were held together, by rivetted brass pieces 5/16" dia. passing through reamed holes.
The solder would make a secure block.
Bruce

**rogerbaker** · 8th October 2012, 02:28 PM

Originally Posted by RayG

What I'd really like, is to find some silver solder paste, to try a bit of proper furnace brazing...

Regards
Ray

Hi Ray
I havent seen paste for silver solder but CIG has a liquid flux for it. Have a talk to your local CIG agent.

Roger

**Michael G** · 8th October 2012, 06:07 PM

Ray, A factory I worked at did lots of parts for the car industry. We called it furnace brazing. Perhaps ring a few solder suppliers and ask about furnace brazing pastes. I haven't worked there for 12+ years so I can't think of anyone I could phone to get a name.

Michael

**Steamwhisperer** · 8th October 2012, 07:01 PM

Hi Ray,
You could try this mob

Code:

www.brazingandsolderingautomation.com.au/

Phil

ADDED By Moderator

Above link is reported to contain Malware, so I have deactivated the link.

**DJ’s Timber** · 8th October 2012, 07:18 PM

Originally Posted by Steamwhisperer

Hi Ray,
You could try this mob

Code:

www.brazingandsolderingautomation.com.au/

Phil

Hey Phil, both my browser and antivirus software tells me that site has malware and not to proceed with opening it??

**Ueee** · 8th October 2012, 07:22 PM

Same here DJ's

Looks really good Ray, i didn't realize it was just electronic solder paste, nice thinking!

**Scott** · 8th October 2012, 07:22 PM

Originally Posted by DJ's Timber

Hey Phil, both my browser and antivirus software tells me that site has malware and not to proceed with opening it??

Yup, I get the same as well:

Screen Shot 2012-10-08 at 19.21.08 .png

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