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1921 actuator checkering pattern


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The checkering on a Colt Actuator is 32 LPI

The diamonds/squares are cut at 90 degrees, at a 45 degree angle to the top of the actuator.

Some appear to be cut very uniformly, almost as if by machine.

Others are more like your photo, wandering around a bit.

 

Seems to me that any reasonable hourly rate for a quality job should also pay for most of a complete knurled 28 actuator.

Or, easily likely, you are a lot faster than me at metal checkering.

 

If you just enjoy a challenge, more power to you.

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i would be careful as the metal around the knob is quite thin and has a weak cross section, a knurling tool on a lathe could crush it, most likely the knobs were knurled early in manufacturing before the inside of knob was cut out. setting the actautator in a machine to knurl looks like a major headake in its self, i wonder if anyone could find a way to stress free EDM the knurl ? just sayn

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i would be careful as the metal around the knob is quite thin and has a weak cross section, a knurling tool on a lathe could crush it, most likely the knobs were knurled early in manufacturing before the inside of knob was cut out. setting the actautator in a machine to knurl looks like a major headake in its self, i wonder if anyone could find a way to stress free EDM the knurl ? just sayn

Maybe, even laser engrave it

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did one a couple years ago, used the CNC with a rotary table, ground a form tool like a boring bar in the spindle and basically scratched the knurl in, worked fine but took close on a day programming and cutting, doubt I would ever do it again, had some pictures I will see if they are on the old hard drive

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did one a couple years ago, used the CNC with a rotary table, ground a form tool like a boring bar in the spindle and basically scratched the knurl in, worked fine but took close on a day programming and cutting, doubt I would ever do it again, had some pictures I will see if they are on the old hard drive

 

I hope you can post the photos.

That would be very interesting to see.

Sounds almost like cut rifling, but done on the outside.

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did one a couple years ago, used the CNC with a rotary table, ground a form tool like a boring bar in the spindle and basically scratched the knurl in, worked fine but took close on a day programming and cutting, doubt I would ever do it again, had some pictures I will see if they are on the old hard drive

 

I hope you can post the photos.

That would be very interesting to see.

Sounds almost like cut rifling, but done on the outside.

 

the cnc spindle is locked from rotating, the head Z axis moved down at the same time the table rotated, the bit shaved 0.005" per stroke, the table rotated to the next and repeated the process,

 

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did one a couple years ago, used the CNC with a rotary table, ground a form tool like a boring bar in the spindle and basically scratched the knurl in, worked fine but took close on a day programming and cutting, doubt I would ever do it again, had some pictures I will see if they are on the old hard drive

 

I hope you can post the photos.

That would be very interesting to see.

Sounds almost like cut rifling, but done on the outside.

 

the cnc spindle is locked from rotating, the head Z axis moved down at the same time the table rotated, the bit shaved 0.005" per stroke, the table rotated to the next and repeated the process,

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Thanks for the info. Still hoping you can post photos.

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