Thread: Herless Surface Grinder - 1987 Model TFY618

More ideas. The tables on some surface grinders are driven by rack and pinion. On the Churchill for instance there is a hydraulically driven pinion engaging a rack on the underside of the table. The rack doesn't have to be a proper gear rack, it can be as simple as a length of roller chain or cog belt.

I removed the chuck and table tonight to have a good look inside.

Small piece of casting has been broken away from beside the rear way. Happened some time ago going by the crud on the broken edges.
IMG_4107 (Medium).jpg

Its definitely been chain drive sometime in its life, and the plastic guides look to be in good condition.
IMG_4108 (Medium).jpgIMG_4109 (Medium).JPG

There's a Turcite type of material on the ways, and the oil is more like grease.
IMG_4112 (Medium).jpg

I pulled the handle out on the oiler then let it go. Couldn't see anything coming out of the oil holes in the ways so gave the handle a decent push to see if that made any difference. It didn't.
I assumed it was just a case of pulling out the handle, and then the oiler would slowly deliver through the various distribution tubes as spring pressure pushed the handle back in.
Is that how they work or am I on the wrong tram?

Steve

Hi Steve,

Yes some oilers are like that, some other types are like a grease gun, where the handle has to be squeezed. I would disconnect the delivery pipe and see what comes out !

Thanks Baron - I disconnected the delivery pipe, pulled the handle out and ended up with a big mess - so the pump is working OK.
I'll look for a blockage further downstream.

I also removed the sprocket and drive shaft.
The shaft runs in 2 bearing races (6001 and 6002) in a cylindrical outer housing. The housing is retained in the saddle by two grub screws.
The bearings are just single metal seal and quite rough. I'll replace them with some rubber sealed ones.
Hopefully my bearing supplier will be able to identify the correct size chain to run on the pulley.

Steve

Originally Posted by OxxAndBert

Thanks Baron - I disconnected the delivery pipe, pulled the handle out and ended up with a big mess - so the pump is working OK.
I'll look for a blockage further downstream.

Steve

Ooo ! Sorry about that

All good Baron - it had to be done, and at 8cc per stroke I didn't exactly have to break out the bucket
The tube runs from the pump via a rigid pipe to a distribution block under the table, and there's a flex line that comes off that to the saddle (as well as a couple of rigid lines that head elsewhere. I disconnected the hose at the table end - no oil coming out at that point.
Looks like I'll probably need to flush all the pipes out

I picked up the new bearings and some chain today. Chain fits perfectly on the existing adjuster block, but I need to make a static block for the LH end of the table so I can connect it up.

IMG_4120 (Medium).JPG

Steve

Only been 2 1/2 years since my last post on the SG. Its moved locations in the workshop but hasn't even had the cover off in that time!

Since I'm playing around with my new TC grinder and need to make some hubs for that I thought I'd pull the hub off this one to see if there was any similarities - ie make up a bunch of them at the same time.

Made a puller with M25x1.5 external thread to go in the hub, and a fine M12x1.25 for the center bolt to apply the force (since I already had the bolt to suit).

Came off easily and the hub has balance weights in it.





I don't have any stock of suitable size to make them out of so will need to buy some. Tossing up what to use, would there be any any point getting some 4140 or save a few dollars and just make them out of 1020?

Steve

I reckon you get a nicer finish straight off the tool with 4140,

Thanks Shed. I've never bought any before so haven't actually turned anything that I knew 100% was 4140. I suspect some of the old scrap shafting that I got from work may have been though - it definitely machines with an almost mirror finish with carbide as long as you take decent cut.

I'll get some 2-1/2" ordered and then get out the defibrillator for my wallet

Steve

Hi Steve, Guys,

You might pick up a piece of hydraulic piston rod that size at a scrappy !

Unfortunately the scrappy option is out at the moment due to COVID restrictions.
I’m out of Melbourne metro area so not quite as restricted as some, but even for me it’s compulsory masks outside of your home and essential shopping only.

Steve

Originally Posted by OxxAndBert

Unfortunately the scrappy option is out at the moment due to COVID restrictions.
I’m out of Melbourne metro area so not quite as restricted as some, but even for me it’s compulsory masks outside of your home and essential shopping only. Steve

If a trip to the big green shed is regarded as an essential service/shopping, so is a trip to the scrappy. What else are you going to do being confined????
Kryn

Hi Steve,

I have one of these grinders. Do you still have yours? I'll go into more detail after your reply.

George

Originally Posted by OxxAndBert

After a rush of blood to the head it seems I'm now the owner of one of these surface grinders.
Apparently it might be a re-badged Ta Fu Yuan brand (Taiwanese), but other than that I've had a decent search online and not come up with much info on them.

Anyone have one themselves, or any info on them?

For starters I'm after any specific info on moving one as I'll be picking it up on Monday. Alternatively any general info/experience about moving small manual surface grinders.

Steve

Hi George - Yes, I’ve still got it.
Haven’t made any progress with getting it working though, as it keeps getting dislodged down the priority list.

Steve