Table Saw Motor Test

Table Saw Motor Test

Giving the Delta motor a stress test to see how it performs, and trying to determine if the arbor bearings need to be changed.
Also, making a bracket to mount the new motor to see how that compares, and if it can be used on the Delta as the permanent replacement for the old motor.

More here:
https://ibuildit.ca/blog/motoring-and-beveling/

50 Comments

  1. Amir Barui on September 12, 2022 at 1:24 am

    Thank you for sharing and all inspirations.



  2. Tom Brown on September 12, 2022 at 1:24 am

    Out at 2:25, on the right hand side of your saw, is that a Pitsburgh clamp from Harbor Freight?



  3. John Heisz - I Build It on September 12, 2022 at 1:26 am

    Pay attention folks – the objective was to stress the motor, not make the cut. I used a dull 60 tooth blade for THAT reason.



  4. John Heisz - I Build It on September 12, 2022 at 1:30 am

    The idea was to strain the motor – cutting the wood was secondary.



  5. Danny Oktim on September 12, 2022 at 1:32 am

    I used that style pool motor the same way you clamped it . . .over 15 years and no bearing problems for a motor I rescued from the trash. . .smart comment about the bearings, didn’t enter my mind.



  6. John Heisz - I Build It on September 12, 2022 at 1:32 am

    What do you suppose the chances are that I don’t know that?
    Test – stress test – stressful cut, not an easy one. An easy cut tells me nothing.



  7. boogerwhopper on September 12, 2022 at 1:33 am

    I agree with you John. Plus the added capability of the pump motor’s higher amperage helps when it’s needed. I have that exact Delta motor and love it BUT, I use thin kerf Freud and resaw anything… pump motor is definitely more capable when put under a lot of stress….Now just for a little "balance" so to speak and you’re all set with that pump motor. Good luck to you Bud!

    Frank



  8. penyebaracun eleven on September 12, 2022 at 1:33 am

    is it 1 phase or 3 phase motor ?



  9. Glass Impressions on September 12, 2022 at 1:34 am

    John, you are using the wrong blade.



  10. JIMMY TATE on September 12, 2022 at 1:35 am

    AC only motors only deliver the stated HP when they are operating at the motors designated RPM. An AC/DC motor will deliver more power at lower RPM’s.



  11. John Heisz - I Build It on September 12, 2022 at 1:35 am

    For the new saw build, I want to make sure I’m not lacking in power and best to address this now, and use a motor that I already have. Making up a bracket and adding a bearing is part of the fun, for me.
    Like you say, for most of what I’ll be doing, the Delta motor would work fine, as long as I stayed in its limits. Nice to have a little extra, though, just in case I need it.



  12. John Hartley on September 12, 2022 at 1:38 am

    Would a link belt help?



  13. Jack Thomas on September 12, 2022 at 1:40 am

    Just put new start and run capacitors on the old motor.



  14. John Heisz - I Build It on September 12, 2022 at 1:42 am

    Yes, but the pump motor had no trouble with it. The 15 amp universal motor in my homemade saw could power through that cut as well. It would bog down, but not stall.
    I guess one of the points I was trying to make is that claiming 1.5HP is not the same as delivering that much power – current draw doesn’t lie. Also, I now know that I definitely want that pump motor on the saw. Bonus is, I got it for nothing.



  15. John Heisz - I Build It on September 12, 2022 at 1:43 am

    It really depends upon where the 120 is coming from, how far the saw is from the main panel – a significant voltage drop will really rob power. My shop (garage) is probably around than 100 feet from the main panel, if the wire run is followed, and this is a factor for a motor that draws that much current.
    I already changed the voltage from 240 to 120 for the test, so I’m all set on that point.



  16. mmanut on September 12, 2022 at 1:43 am

    I have a powermatic contractors saw with a cast iron top & cast iron extension tables. Came with a 2hp motor, very powerful saw. I put a double pulley on motor and arbor and run two link belts. This saw will cut thru anything. It’s a 12 yr old saw and it’s the best saw I’ve used. Very Heavy Duty. If U can find one grab it. Smooth as glass. Balance a nickel on saw table while running and stays standing.



  17. Andre Gross on September 12, 2022 at 1:44 am

    Not only do you need bigger bearings for more side load, you need a different kind of bearing.
    Try and get needle bearings, they are more resistant to sideways load and run smoother.



  18. Robert Starnes on September 12, 2022 at 1:47 am

    Hey John – if you actually read this comment on such an old post…lol – did you successfully use the pump motor for a length of time?



  19. Zach Whyte on September 12, 2022 at 1:48 am

    Do you have a video of the final/permanent bracket for this?



  20. Christopher Eyer on September 12, 2022 at 1:49 am

    A 60 or 80 tooth blade is not for ripping



  21. Ferenc Gácsi on September 12, 2022 at 1:49 am

    I would have used a blade with less teeth for that rip cut…but at least if that blade can cope with that cut then the motor is powerful enough:) good video:)



  22. Azul Marin on September 12, 2022 at 1:50 am

    estaria genial simostraras parte por parte de la maquina



  23. Matthew See on September 12, 2022 at 1:52 am

    I realize this video is now 8 years old, but if by chance you could answer a question for me I would love to hear what you have to say. I have a table saw from Montgomery Ward’s that was built in 1949. It did not have a motor on it when I received it. My ex-father-in-law helped me build a stand for it and mounted a motor directly underneath the table saw. What I am seeing in your video and many others like it is that the motor should extend out away from the table saw. Is there a reason for this? Is there a reason a motor mounted directly underneath the table saw would not work correctly? Any help would be greatly appreciated



  24. جمال منجد العدبا وى on September 12, 2022 at 1:54 am

    Is it possible to be friends



  25. patrik on September 12, 2022 at 1:55 am

    what happen if you use motor 1500 RPM ? ..cant find any pulley to make it faster



  26. gjdewald on September 12, 2022 at 1:55 am

    I am so glad you did this video. I have a Ridgid contractors saw I would like to improve but I don’t know where to start. I hope to learn a lot by watching what you do to your saw.



  27. LostWhits on September 12, 2022 at 1:55 am

    Cool test. Took me a little while to figure out why you were doing what you did. Looking forward to this NEW tablesaw build.



  28. SmokeFlame1 on September 12, 2022 at 1:55 am

    No matter what it is John, you always keep it interesting. I always learn something from your site and your videos. Good work.



  29. Rick McQuay on September 12, 2022 at 1:56 am

    My only point was that In a normal situation you’d probably be using a rip blade which requires a lot less power to make the same cut; and personally I never bury the blade on the first cut even in soft wood. You were the one pushing so I’m not in a position to judge if it’s really worth the effort to adapt the pump motor or find a cooler use for it.



  30. harley75us on September 12, 2022 at 1:56 am

    So in other words, your day job. I hope you can find the time your looking for, I know around here there aren’t enough hours in the day to accomplish all the things I need to do. I really enjoy the video’s. I’m already looking forward to the next one. Take care John.
    Marty



  31. Rick McQuay on September 12, 2022 at 1:57 am

    Interesting stress test although an unreasonable expectation from a 1.5hp motor especially running a combo blade.



  32. John Heisz - I Build It on September 12, 2022 at 2:00 am

    Thanks for the good tips on checking the caps, although these seem to be fine.



  33. jaxplane on September 12, 2022 at 2:01 am

    some motor facts… in addition to the large amp draw difference of the motors, look for the SF or service factor… the pool motor sounds full rated and the the SF will be greater than 1.0. on the original motor it will be 1.0. multiplying the SF x the horsepower will give the absolute max power the motor can produce…. so a SF of say 1.3 will be 1.95 or almost 2HP. SF of 1.0 is 1.5HP max load.



  34. John Heisz - I Build It on September 12, 2022 at 2:02 am

    Yes, I have some concerns that the bearing in the pump motor will not hold up to the side load from driving a belt, since it wasn’t designed for that.



  35. Sam Logosz on September 12, 2022 at 2:05 am

    It takes a lot of pawer to cut maple , especially eastern maple.



  36. Robert on September 12, 2022 at 2:07 am

    Good stuff.



  37. harley75us on September 12, 2022 at 2:08 am

    John,
    Have you given any thought to the idea of having an apprentice?
    This old man can see himself in his upcoming retirement being that person.
    Just a thought.
    As always great stuff.



  38. sphinxios on September 12, 2022 at 2:08 am

    quite a difference in motors and their power, just a thought those capacitors on the older motor might not be that good anymore over time and usage they have a tendency to dry or leak so their capacity might not be there anymore. if you have a capacitor meter or buddy’s measure them heat them up with a hair dryer and see if value changes, if it changes alot then most likely it is going from bad to worse.
    regards



  39. Jay Bates on September 12, 2022 at 2:11 am

    Good job on that quick bracket. Looks like it worked well and glad you have a nice spare motor to use. Good luck with the build.



  40. LuminousWatcher on September 12, 2022 at 2:13 am

    Would it be feasible to put the new motor in the old motor’s enclosure? they look quite similar in size – and would save you from making a new mount…



  41. John Heisz - I Build It on September 12, 2022 at 2:15 am

    For better or worse, this has become my "day job", for the most part, but there’s a lot more to it that most people see. It takes a lot of work to put a project together in a video or on my website, and most of that happens sitting in front of the computer. My time in the workshop is a very small portion of it, unfortunately.



  42. 2460speedy on September 12, 2022 at 2:16 am

    Biggest problem is the motor pulley is to small. You are not getting the correct revolutions.



  43. John Heisz - I Build It on September 12, 2022 at 2:17 am

    Working on that right now, actually. Taking a break to do some "work" in my shop today – a rarity lately!



  44. Chris Dees on September 12, 2022 at 2:17 am

    If the objective was to strain the motor, then using a cross-cut blade to do a buried rip cut on maple is about as much abuse as you can heap on the motor. For those who don’t know (I didn’t connect the dots until recently, you need to install the correct blade for the type of cut. Due to the nature of the material being removed, cross-cuts will be very clean with more teeth (60+) they are labeled as a cross-cut blade. Whereas, a rip-cut likes fewer teeth and a larger gullet (opening between the teeth) and are labeled as such.



  45. Arvindh on September 12, 2022 at 2:18 am

    I am currently experiencing this problem, my motor needs some type of mounting, and this looks a good idea to me, did you make any upgrades for mounting the moto, If you have made any upgrades please share it.



  46. praxisnode on September 12, 2022 at 2:18 am

    lloked to me like the belt was too loose



  47. John Heisz - I Build It on September 12, 2022 at 2:20 am

    I have, but it would have to be someone to do all of the stuff that keeps me out of the shop these days, so that I could do some actual woodworking!



  48. deezynar on September 12, 2022 at 2:21 am

    Good test. I think your gut is right that the bearing in the pump motor isn’t rated for much of a side load. I look forward to seeing how you mount an extra bearing on the end of the shaft.



  49. John Heisz - I Build It on September 12, 2022 at 2:21 am

    Thanks Jay, always helpful when there are some motors around that can be used – I’m always on the lookout for them.



  50. wood1000rio on September 12, 2022 at 2:22 am

    Hey John Why are you not using a 24 tooth ripping blade? Have you check your belt is look like its slipping.