DJ2
Aluminum
- Joined
- Feb 12, 2007
- Location
- Ontario, Canada
I am working out the bugs of a Sanford MG 612 surface grinder, this is the “mid-size” grinder that Sanford offered, coming in at about 600 pounds, it has a ½ HP single phase motor and a 6” x 12” Eclipse magnetic chuck. I was told it had received new spindle bearings recently and it looks like a previous shop scraped the ways reasonable well (the table has one v-way and one flat, transverse direction is two v-ways). After grinding in the chuck, I’m seeing a small persistent chatter. I’m using the wheel that came with the grinder, a Norton 5SG46-JVS. Test cuts are as light as 0.005” or as heavy as 0.002”.
I noticed the grinder does not have a balancing hub, is this something worth looking into? On the Sopko web-site table of contents, they refer Sanford hubs to the “Standard Taper Wheel Adapter” page; which is a good start.
There is no apparent vibration anywhere, the “old machinist’s trick” of placing a cup of water on the chuck shows absolutely no ripples in the water.
What are some suggestions on the best direction to go? I plan on plugging away, I have a few other wheels to try. Test steel is unhardened tool steel (O6).
There may be an art to getting chatter out once it is ground in, right? It’s like driving on a bumpy road.
One other machine I have uses a 3-phase motor with a VFD, is variable speed worth looking into?
If this is a Sopko hub, it looks like I need a thin-wall 11/16” socket to take the hub off, is this a custom tool?
Thanks in advance.
I noticed the grinder does not have a balancing hub, is this something worth looking into? On the Sopko web-site table of contents, they refer Sanford hubs to the “Standard Taper Wheel Adapter” page; which is a good start.
There is no apparent vibration anywhere, the “old machinist’s trick” of placing a cup of water on the chuck shows absolutely no ripples in the water.
What are some suggestions on the best direction to go? I plan on plugging away, I have a few other wheels to try. Test steel is unhardened tool steel (O6).
There may be an art to getting chatter out once it is ground in, right? It’s like driving on a bumpy road.
One other machine I have uses a 3-phase motor with a VFD, is variable speed worth looking into?
If this is a Sopko hub, it looks like I need a thin-wall 11/16” socket to take the hub off, is this a custom tool?
Thanks in advance.