Looking for input on how to construct a tool post grinder.

[JimDawson]

Do you have the electric HF grinder or the air. Eather one should work fine. Just make an aluminum mount for your cross slide. Thay should take 1/4" shank stones. You caould make an arbor for a larger wheel http://www.lowes.com/pd_87494-1069-6117_0__?productId=1103105

Just be sure to use wheels rated at the driver max RPM. Grinding wheels are ugly when they blow up. A lot of die grinders will turn 20,000 plus.

 

[Ray C]

Take a look here: http://www.hobby-machinist.com/showthread.php?t=19687&page=3&highlight=tool+post+grinder

Ray

 

[dbq49]

Ray:
I saw this thread and copied some pics and some directions before I posted my request for input. I like what you have done!
This would be great to have. As ddmunroe asked what kind of bearing are in the 4671 tpg. No one responded to his question of bearings. Cheap junk is still junk and not worth the money. The info on the web site does not supply much info. and no one else has stated that they bought one or are using one of the 4671 tpg. Thanks for your reply, keep in touch. DBQ49er

 

[Ray C]

Ray:
I saw this thread and copied some pics and some directions before I posted my request for input. I like what you have done!
This would be great to have. As ddmunroe asked what kind of bearing are in the 4671 tpg. No one responded to his question of bearings. Cheap junk is still junk and not worth the money. The info on the web site does not supply much info. and no one else has stated that they bought one or are using one of the 4671 tpg. Thanks for your reply, keep in touch. DBQ49er

I managed to get a Nachi P5 taper bearing at a very low price on eBay. I no longer have the model number but I once tried to look it up and couldn't find it. It was something similar to this but with a smaller bore diameter. http://www.vxb.com/page/bearings/PROD/Kit13628

Anyhow, a P5 or ABEC 5 quality bearing that suits your chosen shaft diameter will do the trick. You can probably find a 20mm one for 50 or 75 bucks. I wasn't worried about ultra quality on the driving (radial) side bearing because the force of the wave washers keeps the taper bearing crammed into position.

Ray

 

[Big Bore Builder]

Made these several years ago. Posted a lot of photos of both here on Hobby Machnist.





Both have 0-90 volt DC motors and variable speed drive.