If you want to sharp the drill, how to choose the suitable drill grinder,now i give you the way how to choose the drill grinder.

First you need to make sure what size of drills you need to sharp.For expamle,

TR-13, capacity is 3-13MM
TR-26, capacity is 13-26MM
TR-21, capacity is 3-21MM,
TR-125M, capacity is 0.5-25MM.
TR-60A，Capacity is 3-60MM
TR-80A,Capacity is 3-80MM

Then you need to comfirm which material of your drills,If it is HSS drills, you can use the CBN grinding wheel, If you drill is tungsten steel, then you need to choose the SDC grinding wheel to sharp your drills.

Comfirm the information, wish you will choose the suitable drill grinder to sharp your drills.

By Nina