King Seeley Drill Press - Belts - Router Forums
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post #1 of 10 (permalink) Old 07-04-2016, 02:00 PM Thread Starter
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Default King Seeley Drill Press - Belts

Over the past year, I have been very successful in bringing a 1950s King Seeley drill press back to life. It is working almost perfectly. There appears to be almost no runuot on it. When I drill a 9/16" hole, it's 9/16". Go figure.

Since the drill has the Vari-Slow attachment, it uses three fan belts:

SR-210 (4L210)
SR-200 (4L200)
SR-170 (4L170)

The belts I bought are made by Continental, and they were quite cheap in both price and quality. The problem I'm having is, when the Vari-Slo is on low speed, the belts slip. Tightening the main belt by moving the motor is part of the solution, which I've done, but I'm now wondering whether better, more flexible belts would help.

What are the best belts for this application? Am I on the right track, or are the belts not the problem?

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post #2 of 10 (permalink) Old 07-04-2016, 02:23 PM
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I am also looking for good belts for my Unisaw. I ordered Gates Premium AX24 belts. They are a cog belt which is suppose to be good on transferring power. Cog belst also are suppose to work well on small pulleys. I assume using the low setting on your drill press you are on the largest and smallest pulley so a cog belt may help. I don't have my belts. They will be here on Thursday.

That being said. I have an old Atlas drill press and I run a link belt on it. Single belt. With my 1125 rpm motor on the low setting I was able to drill through 8 or 10 inches of oak without slipping. I can't remember but there is a thread on this forum about it. Too bad my 1125rpm 1/2hp motor burned out. I am looking for a motor.
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post #3 of 10 (permalink) Old 07-04-2016, 04:00 PM
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I am also looking for good belts for my Unisaw. I ordered Gates Premium AX24 belts. They are a cog belt which is suppose to be good on transferring power. Cog belst also are suppose to work well on small pulleys. I assume using the low setting on your drill press you are on the largest and smallest pulley so a cog belt may help. I don't have my belts. They will be here on Thursday.

That being said. I have an old Atlas drill press and I run a link belt on it. Single belt. With my 1125 rpm motor on the low setting I was able to drill through 8 or 10 inches of oak without slipping. I can't remember but there is a thread on this forum about it. Too bad my 1125rpm 1/2hp motor burned out. I am looking for a motor.
I was just going to suggest that link belts might be a solution. However, this is a heavy duty industrial grade tool. They may not be heavy duty enough or the best choice. I'll defer to more seasoned VOE.

My second thought is, like Lee's (Coxhaus) Unisaw the drill press may need to have the pulleys replaced. Another possibility is to use belt dressing on the belts to increase the coefficient of friction on the existing pulleys.

Finally, all belts are not created equal. I would stick with OEM recommendations or the higher quality manufacturers. All things being equal, it will probably just be a one time purchase on replacements.

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post #4 of 10 (permalink) Old 07-04-2016, 10:11 PM
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Originally Posted by patlaw View Post
Over the past year, I have been very successful in bringing a 1950s King Seeley drill press back to life. It is working almost perfectly. There appears to be almost no runuot on it. When I drill a 9/16" hole, it's 9/16". Go figure.

Since the drill has the Vari-Slow attachment, it uses three fan belts:

SR-210 (4L210)
SR-200 (4L200)
SR-170 (4L170)

The belts I bought are made by Continental, and they were quite cheap in both price and quality. The problem I'm having is, when the Vari-Slo is on low speed, the belts slip. Tightening the main belt by moving the motor is part of the solution, which I've done, but I'm now wondering whether better, more flexible belts would help.

What are the best belts for this application? Am I on the right track, or are the belts not the problem?
look to Gates or Springfield belts....
the slippage may be that on speed changes the belt tension drops..
the
the Continental belt are too stiff or aren't fully seated in the pulleys..
the belts are smidgen too long....

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

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post #5 of 10 (permalink) Old 07-04-2016, 10:14 PM
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Originally Posted by coxhaus View Post
I am also looking for good belts for my Unisaw. I ordered Gates Premium AX24 belts. They are a cog belt which is suppose to be good on transferring power. Cog belst also are suppose to work well on small pulleys. I assume using the low setting on your drill press you are on the largest and smallest pulley so a cog belt may help. I don't have my belts. They will be here on Thursday.

That being said. I have an old Atlas drill press and I run a link belt on it. Single belt. With my 1125 rpm motor on the low setting I was able to drill through 8 or 10 inches of oak without slipping. I can't remember but there is a thread on this forum about it. Too bad my 1125rpm 1/2hp motor burned out. I am looking for a motor.
go up in HP to ¾....

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #6 of 10 (permalink) Old 07-04-2016, 10:16 PM
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I was just going to suggest that link belts might be a solution. However, this is a heavy duty industrial grade tool. They may not be heavy duty enough or the best choice. I'll defer to more seasoned VOE.

My second thought is, like Lee's (Coxhaus) Unisaw the drill press may need to have the pulleys replaced. Another possibility is to use belt dressing on the belts to increase the coefficient of friction on the existing pulleys.

Finally, all belts are not created equal. I would stick with OEM recommendations or the higher quality manufacturers. All things being equal, it will probably just be a one time purchase on replacements.
shame on you safety dude....
too much grip on a DP isn't such a good plan should the bit grab...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
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post #7 of 10 (permalink) Old 07-04-2016, 11:39 PM
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shame on you safety dude....
too much grip on a DP isn't such a good plan should the bit grab...
OK, OK, my bad!

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post #8 of 10 (permalink) Old 07-05-2016, 12:39 AM
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go up in HP to ¾....
Yes I agree. I can't find another 1125 rpm motor so I am thinking phase 3 motor with a VFD. The VFD would give me nice speed control. And my understanding is the VFD for small motors are fairly cheap now.
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post #9 of 10 (permalink) Old 07-05-2016, 12:56 AM
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Yes I agree. I can't find another 1125 rpm motor so I am thinking phase 3 motor with a VFD. The VFD would give me nice speed control. And my understanding is the VFD for small motors are fairly cheap now.
so go w/ a Leeson ODP 1200RPM motor and stay 1Ø...
there are a lot of 1140RPM 1Ø motors out there... USA made too..

this way would be the least amount of hassle and money.. immediate and down the road tangible/intangible cost wise..
go w/ a 1750 RPM motor and reduce the drive pulley a wee bit if you want to maintain spindle speeds...

.
Attached Files
File Type: pdf Determining Pulley Speeds.pdf (37.1 KB, 59 views)
File Type: pdf Belts - Length and Speed of Belt.pdf (310.4 KB, 83 views)
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This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”

Last edited by Stick486; 07-05-2016 at 01:06 AM.
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post #10 of 10 (permalink) Old 07-05-2016, 07:51 AM
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