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Rifles, Reloading, Optics, Equipment
Gunsmithing
making a spider on lathe spindle
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<blockquote data-quote="J E Custom" data-source="post: 1091804" data-attributes="member: 2736"><p>I recommend making the spider as short as you can. If you remove the cover and it will allow you to work shorter barrels you can cut the spindle back some. I know a smith that did this and it works well. it was a little trouble to cut and protect the gears from the cuttings but it did not change the operation of the lathe without the spider and with the cover replaced.</p><p></p><p>My Lathe had the bearing close to the cover so I couldn't cut mine or I would have.</p><p></p><p>Some spindles are threaded on the inside and some are on the outside, mine is threaded on the inside so I made the spider slip fit the outside to save the bore diameter and the overall length of the spider. it fits very close to the cover and the reinforced ring that holds the adjusting screws is only 1/2" wide and has 4 socket head screws for clearance and ease of adjusting with a long Allen</p><p>wrench.</p><p></p><p>I first tried brass screws (To prevent marking finished barrels/work) and found that they still made marks, so I switch to using a brass/or aluminum split bushing and let the screws mark that.</p><p>I later switched to the socket head screws for ease of adjustment and have not changed it since.</p><p></p><p>My cover is also Aluminum so I attached a steel plate to it for the magnetic base on my dial indicator for centering the work.</p><p></p><p>I use the spider often and could not do precision work without it. So build it very precise and you will come to depend on it. I also tried a three screw version and found it to be difficult to</p><p>center work increasing setup time.</p><p></p><p>J E CUSTOM</p></blockquote><p></p>
[QUOTE="J E Custom, post: 1091804, member: 2736"] I recommend making the spider as short as you can. If you remove the cover and it will allow you to work shorter barrels you can cut the spindle back some. I know a smith that did this and it works well. it was a little trouble to cut and protect the gears from the cuttings but it did not change the operation of the lathe without the spider and with the cover replaced. My Lathe had the bearing close to the cover so I couldn't cut mine or I would have. Some spindles are threaded on the inside and some are on the outside, mine is threaded on the inside so I made the spider slip fit the outside to save the bore diameter and the overall length of the spider. it fits very close to the cover and the reinforced ring that holds the adjusting screws is only 1/2" wide and has 4 socket head screws for clearance and ease of adjusting with a long Allen wrench. I first tried brass screws (To prevent marking finished barrels/work) and found that they still made marks, so I switch to using a brass/or aluminum split bushing and let the screws mark that. I later switched to the socket head screws for ease of adjustment and have not changed it since. My cover is also Aluminum so I attached a steel plate to it for the magnetic base on my dial indicator for centering the work. I use the spider often and could not do precision work without it. So build it very precise and you will come to depend on it. I also tried a three screw version and found it to be difficult to center work increasing setup time. J E CUSTOM [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
making a spider on lathe spindle
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