开云体育

Fixed steady rest

MikeK All Messages By This Member #119643 I've been working on reducing the vibration in my Chinese 8" bench grinder.? Adding collars for the inner wheel flanges to rest against and making new flanges (ala Harold Hall's "Tool and Cutter Sharpening").? I was cursing having only the 1" rest, when I re-found the steady rest mod doc in the Files section.? Did not have a need for this mod until now. Putting the rest in the mini-mill vise, with the middle slot edge aligned with the left side of the vise, it was just some up and back on the Y to give me a nice opening for my grinder shaft to fit through.? I wound up with a generous 0.885", and I could have gone even further, since I left about 1/32" on each side.? Maybe one day I'll build a larger rest with a nice flip top like many of the Myford guys have. Mike
Bruce J All Messages By This Member #119653 开云体育 In the Nov/Dec 2022 issue of Home Shop Machinist, there’s an article about building a fluid-balancing washer assembly to improve grinder vibration.? 'Build the?Slawsher: A?Balancing?Ring for Grinding Wheels by G L Carlson PH.D.?‘ On May 25, 2024, at 5:43 PM, upand_at_them via <upand_at_them@...> wrote: I've been working on reducing the vibration in my Chinese 8" bench grinder.? Adding collars for the inner wheel flanges to rest against and making new flanges (ala Harold Hall's "Tool and Cutter Sharpening").? I was cursing having only the 1" rest, when I re-found the steady rest mod doc in the Files section.? Did not have a need for this mod until now. Putting the rest in the mini-mill vise, with the middle slot edge aligned with the left side of the vise, it was just some up and back on the Y to give me a nice opening for my grinder shaft to fit through.? I wound up with a generous 0.885", and I could have gone even further, since I left about 1/32" on each side.? Maybe one day I'll build a larger rest with a nice flip top like many of the Myford guys have. Mike <IMG_1991.JPG> --? Bruce Johnson "Wherever you go, there you are." B. Banzai, PhD
Bill Williams All Messages By This Member #119654 I bought a cheap (19.95) Harbour Freight 6"grinder that shook badly. I machined new washere and?took the armature out and squared up the shoulders that located the washers. Also made new shields from aluminum pans. Runs great and smoothly now! toggle quoted message Show quoted text On Mon, May 27, 2024 at 9:42?AM Bruce J via <bruce.desertrat=[email protected]> wrote: In the Nov/Dec 2022 issue of Home Shop Machinist, there’s an article about building a fluid-balancing washer assembly to improve grinder vibration.? 'Build the?Slawsher: A?Balancing?Ring for Grinding Wheels by G L Carlson PH.D.?‘ On May 25, 2024, at 5:43 PM, upand_at_them via <upand_at_them@...> wrote: I've been working on reducing the vibration in my Chinese 8" bench grinder.? Adding collars for the inner wheel flanges to rest against and making new flanges (ala Harold Hall's "Tool and Cutter Sharpening").? I was cursing having only the 1" rest, when I re-found the steady rest mod doc in the Files section.? Did not have a need for this mod until now. Putting the rest in the mini-mill vise, with the middle slot edge aligned with the left side of the vise, it was just some up and back on the Y to give me a nice opening for my grinder shaft to fit through.? I wound up with a generous 0.885", and I could have gone even further, since I left about 1/32" on each side.? Maybe one day I'll build a larger rest with a nice flip top like many of the Myford guys have. Mike <IMG_1991.JPG> --? Bruce Johnson "Wherever you go, there you are." B. Banzai, PhD
Mark Kimball All Messages By This Member #119655 It isn't absolutely necessary to use fluid in an autobalancer.? I've read some build logs that used bearing balls in a grooved disk.? Claimed to work pretty good.? The key to proper operation is to make sure the bearings can move freely in the groove. Awhile back I bought a cheap HF grinder to make a dedicated tool grinder, based on a Harold Hall design.? I haven't made much progress on that but fully expect it will be necessary to add some kind of wheel balancing system to it.
Bruce J All Messages By This Member #119657 开云体育 This was discussed in the the HSM Article I referenced.? --? Bruce Johnson The less a man knows about how sausages and laws are made, the easier it is to steal his vote and give him botulism. toggle quoted message Show quoted text On May 27, 2024, at 10:07?AM, Mark Kimball via groups.io <markkimball51@...> wrote: It isn't absolutely necessary to use fluid in an autobalancer.? I've read some build logs that used bearing balls in a grooved disk.? Claimed to work pretty good.? The key to proper operation is to make sure the bearings can move freely in the groove. Awhile back I bought a cheap HF grinder to make a dedicated tool grinder, based on a Harold Hall design.? I haven't made much progress on that but fully expect it will be necessary to add some kind of wheel balancing system to it.
MikeK All Messages By This Member #119658 Thanks for mentioning that.? I had let my sub lapse because I got tired of too many lame projects.? I may re-sub and then hit up the library. Mike
MikeK All Messages By This Member #119659 Both my 8" HF grinder and my 6" HF grinder shake badly.? The 8" was mounted on a heavy stand and it still ran across the floor unless I loaded down it down with weight...and that was after truing the wheels.? During my "rebuild" I found that one end of the shaft is bent (from the factory!) about 8 thou where the wheel mounts.? I'm now trying to get that side down to under 1/2 thou like the other side.? The internal plastic fan blade was also not installed true, but that was an easy fix. The problem with only squaring up the shoulders where the washers mount is that they're really thin, like 15 thou high if I remember correctly.? The tip from the Harold Hall book was to mount larger collars on the shaft to have something more substantial for the washers to rest against.? Great that you got yours smooth without having much trouble.

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