LumberJocks

Jet Table Saw Lacking Power

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by BlueRibbon posted 09-05-2015 01:31 AM 1322 views 0 times favorited 30 replies Add to Favorites Watch
View BlueRibbon's profile

BlueRibbon

5 posts in 461 days


09-05-2015 01:31 AM

Topic tags/keywords: tablesaw

First post here. I just bought a used Jet JWTS-10 table saw, and I’m having a tough time with it. It’s a 120/240v 1-1/2 hp motor currently wired for 120. I cannot cut through a 1” x 12” piece of fir without it wanting to bring the blade to a stop. I have a heavy duty 12 awg short ext. cord feeding it from a 20A breaker. I adjusted the saw blade squaring it to the miter slides, and the fence to the blade. I have tried 3 different brand new Diable blades (80t, 60t, and 40t) all 10 1/2” The only luck I’ve had has been with a 7 1/4” blade, and it still was a chore to rip. I was told to try a new run capacitor, so that’s next. Any other suggestions? The belt is in good shape too. Is this saw just that under powered???


30 replies so far

View jonah's profile

jonah

687 posts in 2765 days


#1 posted 09-05-2015 01:54 AM

It’s not underpowered. 1 1/2 HP is plenty for a 10” blade, if the motor is working properly and the blade is aligned and sharp. Since you’ve eliminated alignment and a dull blade from consideration, I’d suspect the motor.

View Nicky's profile

Nicky

695 posts in 3558 days


#2 posted 09-05-2015 01:57 AM

Does it ever trip the panels breaker? Does it trip the motors breaker? Is it possible the belt is slipping? Is the arbor spinning freely (with belt removed)?

-- Nicky

View Jim B's profile

Jim B

57 posts in 697 days


#3 posted 09-05-2015 01:59 AM

Does the motor keep running when the blade is stopped? Maybe adjust the motor to tighten the belt? When i make beveled cuts at 45 degrees my blade seems to bog down a bit too. I think the angle of the motor puts less tension on the belt when it is tilted.

View BlueRibbon's profile

BlueRibbon

5 posts in 461 days


#4 posted 09-05-2015 02:03 AM

It has never tripped a breaker or the overload on the motor. Belt tension is reliant on the weight of the motor, so there is no adjustment to tighten the belt. I don’t believe the belt is slipping on the arbor, but I should probably just buy a new belt too. The motor does get hot when trying to make these cuts.

View MrUnix's profile (online now)

MrUnix

4241 posts in 1665 days


#5 posted 09-05-2015 02:06 AM

Take the belt off and spin the arbor and motor by hand… you shouldn’t get more than about one revolution with it free spinning. If it’s difficult to spin or it spins more than once (maybe twice), then it’s the bearings. The capacitor can be tested with a cheap multimeter – even those little 7 function freebies from HF. Examine the belt/pulleys for excessive wear while you have it off.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

View BlueRibbon's profile

BlueRibbon

5 posts in 461 days


#6 posted 09-05-2015 02:07 AM

I’ll try that tomorrow, thanks Brad.

View DW833's profile

DW833

192 posts in 1349 days


#7 posted 09-05-2015 02:32 AM

Experienced something similar. The belt wasn’t tight. Check that and see if it is loose or tight.

View MrRon's profile

MrRon

3926 posts in 2710 days


#8 posted 09-05-2015 07:34 PM

Possibly the set screw that holds the pulley to the motor arbor may have come loose. Also check the set screw on the blade arbor.

View lumberingjoe's profile

lumberingjoe

22 posts in 1414 days


#9 posted 09-06-2015 12:54 AM

1.5 hp is not ‘plenty’. 1.5 hp is the reason they make thin-kerf blades. Get a thin-kerf 40t combination Freud or Forrest (if you can afford).

If you are truly just ripping, get a 30T thin-kerf rip blade.

View gfadvm's profile

gfadvm

14940 posts in 2156 days


#10 posted 09-07-2015 12:37 AM

All the above suggestions are worthwhile BUT you are describing a rip cut and you haven’t tried a RIP blade. For $27 you can get a Freud Diablo 24 tooth rip blade that may solve your problems.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View jonah's profile

jonah

687 posts in 2765 days


#11 posted 09-07-2015 02:41 AM



1.5 hp is not plenty . 1.5 hp is the reason they make thin-kerf blades. Get a thin-kerf 40t combination Freud or Forrest (if you can afford).

If you are truly just ripping, get a 30T thin-kerf rip blade.

- lumberingjoe


He has tried thin kerf blades. The Diablo blades he mentioned are thin kerf. It’s not the blade(s), nor is it the amount of horsepower in the motor.

View gfadvm's profile

gfadvm

14940 posts in 2156 days


#12 posted 09-07-2015 03:06 AM


1.5 hp is not plenty . 1.5 hp is the reason they make thin-kerf blades. Get a thin-kerf 40t combination Freud or Forrest (if you can afford).

If you are truly just ripping, get a 30T thin-kerf rip blade.

- lumberingjoe

He has tried thin kerf blades. The Diablo blades he mentioned are thin kerf. It s not the blade(s), nor is it the amount of horsepower in the motor.

- jonah

A 24 tooth blade will rip much better (easier on the motor) than a higher tooth count blade.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View rwe2156's profile

rwe2156

2198 posts in 947 days


#13 posted 09-07-2015 10:49 AM

Wood could be binding in the cut. Won’t necessarily burn with new blade.
Doesn’t take much to bog a small motor like this.
Quick check of blade-to-fence distance front and back will tell you.
Back of blade should be a few thou wider than front.

-- Everything is a prototype thats why its one of a kind!!

View bonesbr549's profile

bonesbr549

1176 posts in 2533 days


#14 posted 09-07-2015 01:35 PM

I had a low hp saw, and it would bind and I did all the tricks and slowed the cut etc. I got it to work ok with going slow, but in the end one solution fixed the problem a 3hp cabinet saw.

I’d also check to make sure motor is in good shape. blow out any crud in the armature, and does it spin freely and firm when off and no belt load. Also check the pully’s, and belt is in good shape and not dry rotting. As others have suggested. A 1×12 should not bind. Could be case hardened wood. Have you taken some scrap and it does it with all wood?

-- Sooner or later Liberals run out of other people's money.

View RobS888's profile

RobS888

1986 posts in 1311 days


#15 posted 09-07-2015 02:24 PM

Does it bog down during cross cuts?

-- I always suspected many gun nuts were afraid of something, just never thought popcorn was on the list.

showing 1 through 15 of 30 replies

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com