How To Sharpen Metal Lathe Tools On A Grinder

Even though the overall relief angle might be 8 its the almost microscopic angle at.

How to sharpen metal lathe tools on a grinder. Even an inexpensive bench grinder can do a good job grinding lathe tool bits. In some cases you might want to purchase a higher quality fine grit wheel. Here are some tips to help you sharpen your old tools on a bench grinder.

So all you have you to do is set your tool rest on the grinder up for a 50 degree angle grind. For a while now Ive wanted to have a way to sharpen my metal lathe cutting tools. Turn the grinder on and lower the tip of the parting tool onto the moving grinding wheel for a few seconds.

When grinding the turning tool should be placed in the horizontal center of the grinding wheel and the tip of the tool should be slightly upward for about 3 8 When the turning tool contacts the grinding wheel it should move horizontally in the left and right directions. Having said that Harbor Freight sells little diamond wheels that fit any 18 inch chuck tool Dremel or similar. When you sharpen a lathe tool bit youre really re-drawing a number of critical angles.

Ad China Metal Lathe. Keep a small cup of water near your grinder. Simply turn the wheel on and draw the tool across the surface of the stone.

Some people sharpen tools using silicon carbide paper. During sharpening lathe tool please place the lathe tool on the horizontal center of the grinding wheel and the tip of the lathe tool is slightly upward about 3-8 when the lathe tool touches the grinding wheel that the lathe tool should be moved around horizontally. Shown below is what Ive put together to achieve the level of accuracy desired.

To the grinder. For old tools you may want to go with a 60 grit aluminum oxide wheel and medium hardness. The grinding rest was tipped to give the required end relief angle and the fence adjusted to give the front cutting edge angle.