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Rifles, Reloading, Optics, Equipment
Gunsmithing
Shear grinding Lathe tools
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<blockquote data-quote="J E Custom" data-source="post: 1470393" data-attributes="member: 2736"><p>Some people grind by looks and hold the tool in there hand without the tool rest on the grinder. I found this method to be inconsistent in cut quality from one tool to the next. So I take the time to set the grinder rest to the degree desired. when I grind high speed steel tools, I normally grind more than one at a time.</p><p></p><p>You can grind right hand and left hand tools at the same time just by changing sides on the rest. First I start with the end of the tool (Called the face) and set the rest on 5 to 7 degrees depending on the material to be machined. you can grind the compound angle on the face using the same setting of 5 to 7 degrees.</p><p></p><p>The next angle I grind is the side rake (The left or right side of the tool depending on left or right cutting looking down from the top of the tool, This angle is normally about 3 degrees.</p><p></p><p>The last angle is from 2 to 4 degrees on the top rake and greatly effects the way it cuts different materials. When I don't want long curls coming of the tool, I grind a chip breaker (Most carbide tools have this feature on top of the insert).</p><p></p><p>And last but not least, I find that Honing with a good stone will improve the quality of the cut and the life of the tool. Just be careful</p><p>not to change any of the angles at the cutting edge. I hone my threading tools also if I am using High speed steel.</p><p></p><p>If you set the grinder at the proper angles for each rake angle you will see the consistency. and with some practice will be able to free hand most tool grinding and sharpen on the fly. but i still like to set the grinder rest to the optimum angle for the first time for the job. (This also gives me a guide to resharpen a worn tool in a pinch)</p><p></p><p>Just the way I grind my lathe tools.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1470393, member: 2736"] Some people grind by looks and hold the tool in there hand without the tool rest on the grinder. I found this method to be inconsistent in cut quality from one tool to the next. So I take the time to set the grinder rest to the degree desired. when I grind high speed steel tools, I normally grind more than one at a time. You can grind right hand and left hand tools at the same time just by changing sides on the rest. First I start with the end of the tool (Called the face) and set the rest on 5 to 7 degrees depending on the material to be machined. you can grind the compound angle on the face using the same setting of 5 to 7 degrees. The next angle I grind is the side rake (The left or right side of the tool depending on left or right cutting looking down from the top of the tool, This angle is normally about 3 degrees. The last angle is from 2 to 4 degrees on the top rake and greatly effects the way it cuts different materials. When I don't want long curls coming of the tool, I grind a chip breaker (Most carbide tools have this feature on top of the insert). And last but not least, I find that Honing with a good stone will improve the quality of the cut and the life of the tool. Just be careful not to change any of the angles at the cutting edge. I hone my threading tools also if I am using High speed steel. If you set the grinder at the proper angles for each rake angle you will see the consistency. and with some practice will be able to free hand most tool grinding and sharpen on the fly. but i still like to set the grinder rest to the optimum angle for the first time for the job. (This also gives me a guide to resharpen a worn tool in a pinch) Just the way I grind my lathe tools. J E CUSTOM [/QUOTE]
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