Thread: I have the Power (Surface grinder)

Originally Posted by Ueee

Whats the graduations? .001" i'm guessing, pretty course for a SG so the vernier scale is really a must.

Yeah. The grads are a long way apart so guesstimating smaller is easy. Michael's mod takes away the need to do that - in theory. In practice, how much does the head actually move?

I'm pretty happy with the design of these, for a simple unit. The vertical slide nut assembly is spring loaded to take out backlash, and mine does move up/down very nicely. The ways on mine were perfect and had originally been hand-scraped to fit. So no stick-slip from cocking & binding.

For a small benchtop SG they're simple in construction, very well built and seem to work well. However as I'm bone idle, sooner or later I'll want one with power feed.....

PDW

Originally Posted by PDW

For a small benchtop SG they're simple in construction, very well built and seem to work well. However as I'm bone idle, sooner or later I'll want one with power feed.....

Not having the feed would drive me mad. I've done some jobs where i have stood for hours in front of the machine, just watching go back and forwards....It's a good time to to have a bit of a clean up.
I guess though if i only had a small machine with hand feed i wouldn't have taken the jobs on!

Ew

Or you would add power feed to the machine which I have plans to do one day

Originally Posted by welder

Or you would add power feed to the machine which I have plans to do one day

Power downfeed should be simple enough to make up. A stepper motor driving a toothed belt driven by a counter which in turn is clocked by a proximity switch that picks up the table travel, and generates a step for every X number of pulses on the prox.

I am planning to do something similar to implement automatic downfeed on the shaper.. (one more project )

Ray

I keep getting these emails from some guy asking whether I've finished sorting out this grinder - anyone would think that he had one too and wanted to compare notes...
Anyway, I'm slowly inching towards completion. I managed to throw some paint on the wheel guard on the weekend and finish the captive screws, so a progress shot of that -
P1020388 (Medium).JPG

I'm not sure I have the proportions right so a remake is possibly on the cards - or maybe just milling a bit off the bottom.
Wheel guard 1 (Medium).JPG Wheel guard 2 (Medium).JPG

For those who don't know what a captive screw is, this is one here.
P1020389 (Medium).JPG
Both bits to be joined together have a female thread. The reduced diameter proportion of the screw normally clears the thread in the front bit so that it just screws into the second thread. However, that first thread retains the screw so that it can not fall out - rough representation (that is, not to up to Bob standards)

captive.jpg
Michael

PS - the white thing is not a grinding wheel but a piece of MDF used for development purposes.

Originally Posted by Michael G

I keep getting these emails from some guy asking whether I've finished sorting out this grinder - anyone would think that he had one too and wanted to compare notes...
Anyway, I'm slowly inching towards completion. I managed to throw some paint on the wheel guard on the weekend and finish the captive screws, so a progress shot of that -
P1020388 (Medium).JPG

I'm not sure I have the proportions right so a remake is possibly on the cards - or maybe just milling a bit off the bottom.
Wheel guard 1 (Medium).JPG Wheel guard 2 (Medium).JPG

For those who don't know what a captive screw is, this is one here.
P1020389 (Medium).JPG
Both bits to be joined together have a female thread. The reduced diameter proportion of the screw normally clears the thread in the front bit so that it just screws into the second thread. However, that first thread retains the screw so that it can not fall out - rough representation (that is, not to up to Bob standards)

captive.jpg
Michael

PS - the white thing is not a grinding wheel but a piece of MDF used for development purposes.

Elegant guard - which is more than I can say. However, I've ground stuff on mine.....

PDW

My excuse is that it's about the journey - not just the destination.

Michael

Originally Posted by Michael G

My excuse is that it's about the journey - not just the destination.

Michael

I'm older, I need the comfort of occasionally getting something functional (not necessarily finished) before I die...

Next time I mix some grey Jotun 605 for the boat, the guard will get a coat.

Picked up a 10" x 5" fine pole mag chuck the other day so I can now use all the work envelope.

PDW

Looking good Michael. I feel a level of attachment to that machine, even though I never owned it! Never seen the original guard but the one you made looks pretty darn good for my liking.

Simon

Nice work on the whole restoration Michael, should last another 60+years. How did you make the cover for the stone?
Kryn

Picked up a 10" x 5" fine pole mag chuck the other day so I can now use all the work envelope.
PDW did you get this on fleabay Sunday 29th June? Was it an Eclipse brand?
Kryn

Originally Posted by KBs PensNmore

Picked up a 10" x 5" fine pole mag chuck the other day so I can now use all the work envelope.
PDW did you get this on fleabay Sunday 29th June? Was it an Eclipse brand?
Kryn

No, bought it new off of Hare & Forbes. I got tired of waiting for a used one to appear on fleabay and this one cost me about the same as I'd have paid if I bought one from the USA and had to pay postage. Haven't tried it out yet but it looks pretty good, and how hard is it to make a mag chuck after all?

PDW

Originally Posted by Michael G

My excuse is that it's about the journey - not just the destination.

Michael

Yes indeed, if life's a journey, don't be in a hurry to get to the destination..

Completing the restoration is just the start of a longer journey.. looks good BTW...

Ray

Originally Posted by KBs PensNmore

How did you make the cover for the stone?

It's fabricated from plate - I had some 5mm lying around. Probably could have been a bit thinner but "the price is right" argument came into it.
The corners and edges are black steel pipe elbows (weld type) with pipe between. It is my standard way of getting something that looks cast for things I am repairing. I used the same method for the lathe stand when its cast iron door cracked.

Michael

Originally Posted by PDW

No, bought it new off of Hare & Forbes. I got tired of waiting for a used one to appear on fleabay and this one cost me about the same as I'd have paid if I bought one from the USA and had to pay postage. Haven't tried it out yet but it looks pretty good, and how hard is it to make a mag chuck after all?

PDW

Only asked as I was bidding on one on fleabay, went for $198 plus $56 postage, and thought it might have been you.
Kryn