10ER motors, 1/2HP or 3/4HP

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Majones1
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10ER motors, 1/2HP or 3/4HP

Post by Majones1 »

If I could get one, does a 3/4HP motor increase the table saw’s cutting power enough to consider replacing the 1/2HP motor that is currently in my 10ER? I expect to be cutting thicker hardwoods, like walnut and cherry, and the blade bogs down completely in 2” Sitka spruce. What do you think, should I do it?
Marc Jones

Model 10ER (1952), s/n: 72883 (MickyD restored in 2009/10) / Variable Speed Changer / A-34 Jigsaw / Jointer-Shaper Fence
Mark 5 Model 500 (1955), s/n: 309828 (MickyD restored in 2008/09) / Magna Jigsaw Model 610, s/n 65001 / Yuba 11” Bandsaw Model 630, s/n 39807 / Magna Jointer Model 620, s/n 17792 (restored in 2021) / Magna 6” Belt Sander Model 640, s/n 13742 (to be restored)
Professional Planer Model M5082, s/n 003918
DC3300 Dust Collector (circa 1998)
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JPG
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Re: 10ER motors, 1/2HP or 3/4HP

Post by JPG »

Have you tried slower rpm? Slower feed rate? Blade sharp???
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╟JPG ╢
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Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10
E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
Majones1
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Re: 10ER motors, 1/2HP or 3/4HP

Post by Majones1 »

Speed is ~3400rpm; the blade is a new Dewalt 7-1/4”; and feed rate is very slow.

I’ve had to feed nearly everything more than an inch thick really slow. Haven’t been able to find 8” blades locally and the old blades have got with my 10ER were 9” blades that I have to be careful to not set too deeply in the table. I’ll get a couple 8” as soon as I can, but I kind of don’t think they will help this problem. Of course, being new to this I could certainly be wrong about that.
Marc Jones

Model 10ER (1952), s/n: 72883 (MickyD restored in 2009/10) / Variable Speed Changer / A-34 Jigsaw / Jointer-Shaper Fence
Mark 5 Model 500 (1955), s/n: 309828 (MickyD restored in 2008/09) / Magna Jigsaw Model 610, s/n 65001 / Yuba 11” Bandsaw Model 630, s/n 39807 / Magna Jointer Model 620, s/n 17792 (restored in 2021) / Magna 6” Belt Sander Model 640, s/n 13742 (to be restored)
Professional Planer Model M5082, s/n 003918
DC3300 Dust Collector (circa 1998)
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JPG
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Location: Lexington, Ky (TAMECAT territory)

Re: 10ER motors, 1/2HP or 3/4HP

Post by JPG »

I am assuming the motor is stalling at that high speed. Lowering the speed will increase the torque at the blade.

Try the middle pulley sizes, or 0-1 high with speed changer.
╔═══╗
╟JPG ╢
╚═══╝

Goldie(Bought New SN 377425)/4" jointer/6" beltsander/12" planer/stripsander/bandsaw/powerstation /Scroll saw/Jig saw /Craftsman 10" ras/Craftsman 6" thicknessplaner/ Dayton10"tablesaw(restoredfromneighborstrashpile)/ Mark VII restoration in 'progress'/ 10
E[/size](SN E3779) restoration in progress, a 510 on the back burner and a growing pile of items to be eventually returned to useful life. - aka Red Grange
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chapmanruss
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Re: 10ER motors, 1/2HP or 3/4HP

Post by chapmanruss »

Hi Marc,

A 3/4 HP motor would help some. Changing to a lower speed as JPG suggested can help too. One interesting thing about the Model 10E and 10ER is they were advertised as a 3 speed tool but can run 7 speeds by realigning the pulleys and adding the use of the 2" to 3" and the 3" to 4'" pulleys (see attached PDF chart). This gives your more speeds without a speed changer which can be helpful. In this case you do not have to cut the RPM's in half to reduce them for sawing. Using a single belt from the motor directly to the drive sleeve will provide more torque than using a speed changer. You can vary the RPM's more with a speed changer but you will lose torque with the additional belt and hardware.

_
Table of Speeds Model 10s.pdf
(182.91 KiB) Downloaded 91 times
Russ

Mark V completely upgraded to Mark 7
Mark V 520
All SPT's & 2 Power Stations
Model 10ER S/N R64000 first one I restored on bench w/ metal ends & retractable casters.
Has Speed Changer, 4E Jointer, Jig Saw with lamp, a complete set of original accessories & much more.
Model 10E's S/N's 1076 & 1077 oldest ones I have restored. Mark 2 S/N 85959 restored. Others to be restored.
Majones1
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Re: 10ER motors, 1/2HP or 3/4HP

Post by Majones1 »

Jpg and Russ, going forward I’ll be keeping those two ideas in mind as I cut wood. I certainly wouldn’t have thought to cut the speed, I was just using a speed chart for the table saw. I need to get a longer belt to bypass the speed changer in the future, but I can’t wait to try it. Thanks.
Marc Jones

Model 10ER (1952), s/n: 72883 (MickyD restored in 2009/10) / Variable Speed Changer / A-34 Jigsaw / Jointer-Shaper Fence
Mark 5 Model 500 (1955), s/n: 309828 (MickyD restored in 2008/09) / Magna Jigsaw Model 610, s/n 65001 / Yuba 11” Bandsaw Model 630, s/n 39807 / Magna Jointer Model 620, s/n 17792 (restored in 2021) / Magna 6” Belt Sander Model 640, s/n 13742 (to be restored)
Professional Planer Model M5082, s/n 003918
DC3300 Dust Collector (circa 1998)
User avatar
chapmanruss
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Joined: Tue Aug 26, 2014 8:16 pm
Location: near Portland, Oregon

Re: 10ER motors, 1/2HP or 3/4HP

Post by chapmanruss »

Marc,

Having the belt for use without the speed changer is a good idea and adds flexibility. This is one of those times it can be better to not use the speed changer. If I recall from the other threads your 10ER has a different motor than the commonly found A. O. Smith motor. No problem and I believe it will use a 38" belt (4L 380) too. I would also suggest getting a 39" belt (4L 390) to use the additional speeds given in the PDF chart I posted in my previous post. Note the opening paragraph below from the Speed Changer Instructions.
The SHOPSMITH Speed Changer is designed to give slow speeds for turning large pieces and for metal drilling; and to give high speeds for operations such as shaping and routing. Use of the Speed Changer introduces an additional belt and additional pulleys and, therefore, it will introduce a slight power loss. This power loss will be minimized if belts ore properly aligned and adjusted as described below. If you have an occasional job that requires considerable power, such as cutting 2 x 4's or a heavy piece of hardwood, feed work slowly and Speed Changer will provide sufficient power. If you have a large job, such as cutting many 2 x 4's for building studs, we recommend that you use the standard SHOPSMITH belt. This you can do, without removing the complete Speed Changer, by taking off the idler pulley, reversing the motor pulley, and installing the standard belt
Russ

Mark V completely upgraded to Mark 7
Mark V 520
All SPT's & 2 Power Stations
Model 10ER S/N R64000 first one I restored on bench w/ metal ends & retractable casters.
Has Speed Changer, 4E Jointer, Jig Saw with lamp, a complete set of original accessories & much more.
Model 10E's S/N's 1076 & 1077 oldest ones I have restored. Mark 2 S/N 85959 restored. Others to be restored.
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