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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Clausing 5914 - back hold down plates
I took the two back hold-down plates off the carriage, cleaned
everything up, and re-assembled. There was visible wear on the plates, but not excessively so. The left (headstock side) plate had two 0.002" brass shims under it, while the right plate had only one 0.002" shim. I removed one shim from each plate, and the carriage dragged somewhat near the tailstock (where the bed is unworn), so I made up two 0.001 shims to replace the removed 0.002" shims. In any event, the hold down plates were not very loose to start with. The manual shows the late coming with more shims that I have, so prior owners may have been removing shims as needed. With a 3/8" shank carbide bit, I was able to make a cut ~0.100" deep without chatter, although a heavy hand was needed. It was on the edge of chatter, and a long smoking hot chip came out. I was cutting a shoulder, moving the carriage to the left. But I do seem to be achieving something like the expected stock removal rate. Joe Gwinn |
#2
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Clausing 5914 - back hold down plates
Joseph Gwinn wrote:
With a 3/8" shank carbide bit, I was able to make a cut ~0.100" deep without chatter, although a heavy hand was needed. So the 0.1" were radius? Then you really can be happy with that value on a lathe of that size. Even for diameter, it is quite OK. ... and a long smoking hot chip came out. Coolant. :-) Nick -- The lowcost-DRO: http://www.yadro.de |
#3
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Clausing 5914 - back hold down plates
In article ,
Nick Mueller wrote: Joseph Gwinn wrote: With a 3/8" shank carbide bit, I was able to make a cut ~0.100" deep without chatter, although a heavy hand was needed. So the 0.1" were radius? Then you really can be happy with that value on a lathe of that size. Even for diameter, it is quite OK. Yes, 0.100" radius (0.200" diameter reduction). I may have found and fixed all the loose joints. Except for those in the toolpost itself. ... and a long smoking hot chip came out. Coolant. :-) Brushed-on black sulfur oil. Very dramatic. Soluble oil isn't nearly as dramatic. Joe Gwinn |
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