Surface grinder options; Wuertz attachment or modify a dedicated grinder?

synthesist said:
That looks really clean.

I have a Boyar-Schultz 612 (manual too) with the same cabinet that was cheaper but not nearly as new looking. It came with a dandy dust collector (which made a lot of sense considering that it was in the guy's basement). The previous owner (handy guy as you might expect) fabbed up a sheet metal shroud to make connecting a 2 1/2" hose for that collector very easy.

BTW You're gonna want 2 kinds of oil for that:

Spindle (something really light)

Way (something much heavier)

I got a gallon of each of those (clearly a lifetime supply) from an industrial supplier here in Chicago who took pity on me pricewise so if you want me to ship a pint of each off to you (on me) let me know. Consider it me paying it forward.............

Corey "synthesist" Gimbel
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This machine has not been used very much. The paint is almost perfect and all the decals are in place. No evidence that it has ever been repainted. The ways look new! Just the flaking and no longitudinal scratching. I need to get it leveled before doing anything else with it because I can see that the way oil doesn't distribute evenly without it. I already have a couple gallons of Vactra which is one of the recommended way oils. I thought the spindle was grease packed at the factory. I have an old manual that I downloaded and that's what it indicates. I really appreciate the offer though.

Bob
 
I run a surface grinder, big bandsaw and belt grinder off the same vfd. I simply had a female plug comming out of the vfd and the machines all have male plugs. I just plug whatever machine I am using in to the vfd. You can only run one machine at a time off the vfd so instead of flipping a switch, you just plug and unplug. Also adding additional three phase machines is just plug and play.




RangerBobTX said:
Ok, got it unloaded and put in position. I actually found the guard buried in the back of the cabinet so that's cool. I'm going to call Contact Rubber Corp. tomorrow and order a 6" wheel to fit the arbor. I'm leaning toward a serrated unless anyone has any reason I wouldn't want it. I really like the way Karl reutilized the grizzly arm but I can probably make my own for substantially less money. Grizzly wants $360 for the arm assembly.

At first I was planning to connect this to my 3-phase circuit fed by my RPC. Problem is, that the circuit is on the other side of the shop. I put the SG next to my GIB so I'm thinking it makes sense to run it off the KBAC-27. I need to figure out switching for that. I was hoping to do a disc grinder also so I need to switch between three machines. I know there was a thread on that so I'll have to do some searching.

Bob
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Nice looking rig Bob. When I was at Bob Dozier shop a couple weeks ago he had 3 or 4 SG set up all with 10" wheels but they had changed the motors to 5 horse. Keep me posted on how the wheel works out I might want to do that to mine as well but the pink wheels do a great job.
 
Man you lucked out. I have been looking for a surface grinder for my shop for years. Nothing ever comes up around here for a reasonable price. Looks like you scored.
 
Jim McGuinn said:
Nice looking rig Bob. When I was at Bob Dozier shop a couple weeks ago he had 3 or 4 SG set up all with 10" wheels but they had changed the motors to 5 horse. Keep me posted on how the wheel works out I might want to do that to mine as well but the pink wheels do a great job.
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Jim, can you tell me what the wheel you are having good success with is? Also, what material are you grinding that you are impressed with the finish?

Also, anyone who has done a belt conversion, did you order your contact wheel to fit the spindle adapter or the taper of the spindle itself?

Bob
 
RangerBobTX said:
Also, anyone who has done a belt conversion, did you order your contact wheel to fit the spindle adapter or the taper of the spindle itself?

Bob
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The diameter of the hole in the grinding wheel was the dimension I based my wheel specs on.

Thanks

John
 
RangerBobTX said:
Jim, can you tell me what the wheel you are having good success with is? Also, what material are you grinding that you are impressed with the finish?

Also, anyone who has done a belt conversion, did you order your contact wheel to fit the spindle adapter or the taper of the spindle itself?

Bob
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Bob the stones are 3/4" wide Norton pink wheels. Sorry I'm not at home to give you the number off them. My machine also came with a slew of used but appeared to be good wheels. Some turned out to be the wrong hole size and others appeared to be soft and wore down fast and left a less than desirable finish I have used the new wheels on 5160. Also on the grinders I build the tool arms are 1-1/2" cold rolled steel I take about .015 off of them so they slide smothly .
They leave a nice finish.
Keep in mind if you go up to a 2x72 belt I think your going to need a bigger motor or your depth of cut is going to be limited.

Jim
 
I got a contact wheel ordered today. I went with a serrated 1-1/8" wide by 6" diameter. After reading everything I could find about doing these conversions, I decided that I will split my belts down to 1" width to run on the grinder. I went with Sunray because they were a little more than $50 cheaper than Contact Rubber Corp. Lead times for both companies is about 3-4 weeks so I have some time to get the rest of the conversion together.

I also ordered ten assorted abrasive wheels that I felt better suited the type of grinding I will be doing. The ones I got with the machine were mostly in bad shape or not suitable because they were too hard. The wheels I went with are all 46-80 grit A/O wheels in the G to I grade with a structure of 8-12. I also made a single point dresser as my first grinding project and ordered up a couple 1/4ct dressing points.

John, I ended up hooking the grinder up as you suggested. I picked up a L14-20 twist-lock receptacle and two plugs and rewired everything so I can just plug in the tool I need.

Bob
 
Wow.................

You're moving fast on this one. I've been thinking about a belt conversion on mine for a long time.

I think this calls for a separate WIP thread all by itself starting with EXACTLY how you measured the rubber contact wheel dimensions for Sunray.

This will be very instructive

Corey "synthesist" Gimbel
 
Corey, I will take pictures as I do the conversion. Once the contact wheel gets here and I have tested everything out and seen that it works, I'll throw a WIP thread up.

Bob
 
Thank you sir.....................

I'm going to work out EXACTLY what I think I need (parts and metal) to do this conversion as well. Then I'll draw up a dimensioned plan to work from.

I'm going to be home for a while after hip surgery in July and that would be a good time to work on this once I'm mobile.

Thanks again

Corey "synthesist" Gimbel
 
I know I said I would do a separate WIP thread on the conversion of this grinder but, I thought I'd go ahead and throw this up here. The weather in DFW was pretty bad yesterday so I just stayed in the house and worked out the details of what I'm going to build. I like to do models like this on assemblies and complex parts because it usually highlights any issues. Though I have CAD/CAM capability, I no longer have a CNC machining center so I will machine out the parts on my manual machines. Pretty easy stuff anyway.

Bob

SURFACE GRINDER BELT CONVERSION by Ranger_Bob, on Flickr
 
Hope I am not too late to the party with my $.02... My only suggestion is that if you go with a stone (standard surface grinder, no belt) you will want to find something that is hydraulic (meaning it moves the table and cross feed automatically). Otherwise, you will curse it if you do any kind of volume. You can get a decent finish off a stone, but trial and error on the type of stone is critical. I use a Brown and Sharp 618 Micromaster. It is a 2 axis hydraulic unit built in 1970 and recently rebuilt. I can do 4-6 blades at a time when needed. We call it a few thousand pounds of beautiful! There is a picture of it on our website under the How The Knives are Made Section. Or just jump to it here. http://www.mgmknives.com/Articles.asp?ID=255
I hope this helps!
 
@RangerRobTX

This just woke me up out of a sound sleep....................... I was dreaming the following:

Since, coincidentally we have the same Boyar Schultz 612 (actually I'd be doing some careful measuring to confirm that fact though) and you are forging ahead on a conversion I want to do but would dawdle my way through at best. Why not make 2 of everything and I'll take the second set off your hands? I can get the contact wheel from SunRay like you did and I'd be set up far sooner then if I was attempting to do it myself, especially, since I'm spending most of my free time these days learning to weld. This way you (the hero in this fantasy) make some $ to offset your B/S SG acquisition cost, your design efforts and fab/machine work (relatively easy for you) and I (the needy petitioner peasant in this drama) get my conversion done quicker that I'd ever get it done on my own (and probably better too).

Think it over and let me know at cdgimbel@att.net.

No pressure though.

Corey "synthesist" Gimbel
 
RangerbobTX OR synthesist

Does your guys grinders have an electromagnetic chuck or manual chuck? I couldn't tell from the pic of bobs.

Thanks Jay
 
Corey, when I do the WIP, I will post all my technical drawings for the components. That will include the drawing for the contact wheel. Anyone will be welcome to use them. It wouldn't make any sense for me to make two because if anything doesn't work and I have to make changes, then I would have to do it for two. Also, I'm well into this project already.

Jay, my chuck is electromagnetic but, I think that is uncommon on this particular model. I really like it though!

Bob
 
RangerBobTX said:
Corey, when I do the WIP, I will post all my technical drawings for the components. That will include the drawing for the contact wheel. Anyone will be welcome to use them. It wouldn't make any sense for me to make two because if anything doesn't work and I have to make changes, then I would have to do it for two. Also, I'm well into this project already.

Jay, my chuck is electromagnetic but, I think that is uncommon on this particular model. I really like it though!

Bob
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Bob I have the same grinder with an electromagnetic chuck and I'm having trouble sourcing the vacuum tube in the rectifier. What model is your rectifier?

I can't wait to see your conversion on this! I'm still running stones but have thought of changing over to belts.
 
Jaysmith10................ my magchuck is manual so, alas, no help here.

RangerRobTX.............. no worries. This will give me an opportunity to put my newly acquired MIG welding skills/tools to use, which will justify them (sorta, kinda) to my wife whose comment on the welding was, "You managed to work metal with nuts and bolts for 60+ years and now you're going to apply massive amounts of plasma (she's a physicist wannabe, ehhhhh) to it instead? I think this is just a scam to buy more tools and burn down the garage." My wife disdains my knifemaking tools until she needs every one of her gardening tools sharpened and spiffed up or a special 2-64 connector for her Cubics Interchangeable Knitting Needle Set created on the spot, that very minute, then she admits that they do have some utility.

Onward and upward.

Corey "synthesist" Gimbel
 
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