Surface grinding

[Freds Edge]

Does anyone have some pointers on surface grinding , when I surface grind thinner stock .124 an down I get the bends !

 

[Don Robinson]

Place it on the chuck at an angle, take about .0005" off each pass, turn it over often.

 

[Freds Edge]

Thanks Don , at times the hurried you go the be hinder you get ,this is one of those times.

 

[Don Robinson]

Thanks Don , at times the hurried you go the be hinder you get ,this is one of those times.

Yeah, but when you're surface grinding, the faster you move the chuck, the better. Less heat buildup, which causes warping. :biggrin:

 

[Calvin Robinson]

Also,take off equal from both sides. Take off .005 then flip it over and take off another .005 this will reduce the warpage.

 

[Don Robinson]

Also,take off equal from both sides. Take off .005 then flip it over and take off another .005 this will reduce the warpage.

Right you are, Mr. Robinson! :60:

 

[Don Robinson]

The grit of the wheel also has a lot of affect on heat buildup. Use a coarse grit (60) or so for metal removal, finer grit for finish.

 

[Freds Edge]

Thanks Guys , as soon as it gets into the 20s or 30s I will try to heat the shop and put this advise to work.

 

[Dan Seaver]

For higher material removal rates I've found the best method is to remove .010" on the Z axis while feeding your Y axis in at .020" per pass using a 36 grit wheel and flood coolant. After completing a full pass flip the bar and grind the opposite side. As you grind the leading edge of the wheel will break down exposing fresh grain while keeping the remainder of the wheel nearly perfectly dressed. This will allow the dressed section of the wheel to "spark out" the material being ground providing an excellent finish.

 

[tomwatson]

Don't have this problem. I use abrasive grinding belts. They run very cool.