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1959 Autocar

Posted By PickerRun 6 Years Ago
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Wolfcreek_Steve
Posted 5 Years Ago
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All in all, that video is acceptable speed and feed. You don't want to make purple chips from speed and feed, but you want to push hard enough to cut nice clean stringy chips, as opposed to flakes and powdery chips.


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“He, who is without oil, shall throw the first rod” Compressions 8.7:1
Steve Peterson
Central Wisconsin

Follow The Leaders For They Know The Way AUTOCAR

Tony Bullard
Posted 5 Years Ago
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I believe those drill motors are brush type and produce no torque at synchronous or no load speed. They have to be lugged down to produce torque. The motor it self probably turns 5 to 10,000 rpm and is geared down to reduce drill speed and multiply torque. That is how they get a lot of HP out of a small package.


Tony
Tony Bullard
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PickerRun if your Slugger is MODEL: #06920 you are feeding it way too slowly (in my opinion) for the power you have. Even a feed of .001" per tooth (6 teeth?) at at your full load speed of 280 you should have been through the 5/16" plate in 11 seconds. Even if you feed it at .0005 which is getting very close to "rubbing" it would have been 22 seconds.
 



Here's a calculator that may help but don't exceed your HP..
Hougen Speed and Feed Calculator

Tony
wayne graham
Posted 5 Years Ago
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Tony, It is hard to tell on camera but I believe my Milwaukee slugger turns slower. No big deal except cutter life.

I cried because I had no shoes till I met a man who had no class.
Wolfcreek_Steve
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Even the 395 rpm won't be a problem for a 5/8 cutter, but as Tony said .001 per tooth is the minimum feed. I've seen a lot of people in industry that don't understand the feed per tooth thing and not feed hard enough to get good tool life.
BTW PickerRun, I don't think anyone here is trying to bust your chops, you didn't weld the cutter into a hole and (as Marsha Stewart would say) that is a good thing.


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“He, who is without oil, shall throw the first rod” Compressions 8.7:1
Steve Peterson
Central Wisconsin

Follow The Leaders For They Know The Way AUTOCAR

wayne graham
Posted 5 Years Ago
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I am with Steve, definitely not being critical. I have done the job you are doing and you are to be complimented sir. It is looking good.

I cried because I had no shoes till I met a man who had no class.
PickerRun
Posted 5 Years Ago
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I never would have guessed the amount of feed back a guy could get on this drilling topic. As far as all the comments, more information is better! Its crazy the science that goes into drilling holes.

Tony Bullard
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Wolfcreek_Steve (1/20/2016)
Even the 395 rpm won't be a problem for a 5/8 cutter, but as Tony said .001 per tooth is the minimum feed. I've seen a lot of people in industry that don't understand the feed per tooth thing and not feed hard enough to get good tool life.
BTW PickerRun, I don't think anyone here is trying to bust your chops, you didn't weld the cutter into a hole and (as Marsha Stewart would say) that is a good thing.


Thank you, Steve. I try to never be critical but as hard as I may I’m still not very diplomatic. I’ve been aware of this ever since I’ve been on the forums and have many times booted myself in the butt after posting.





Tony
PickerRun
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Here is a question for you Auto Car guys. There is a cross member that aligns with the rear motor mounts. I don't know if it was added when it got the 335 or if it is standard?
http://forums.justoldtrucks.com/uploads/images/a7f559ed-6f9e-4c02-af28-cc79.jpg
That C channel just looks out of place.
http://forums.justoldtrucks.com/uploads/images/b48e07ab-b2bb-4a5c-a189-10c1.jpg

http://forums.justoldtrucks.com/uploads/images/ec497073-0303-4046-9170-b86e.jpg
Slim 3979
Posted 5 Years Ago
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Mr PickerRun,
 We are really enjoying your rebuilt  and so far we haven't even got our hands dirty yet.  Keep us posted.

Slim


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