"I work on the basis of if it ain't broke don't fix it!"
I was dumb enough to put this in my last post. Well, I made the "small bit holder" for my Clarkson T&C, I went to try it out and guess what, the magic white smoke escaped! "notchy" bearings had gone too far. So I've been obliged to change the bearings and the motor.
I had gathered together the bits to make a two speed set up with a 380volt three phase motor. When I looked more closely, I found a very UN-original belt and pulley set up. I wasn't getting the 4000rpm spindle speed with the pulleys as was.
![[Image: aswas_zpsd5cdff33.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/aswas_zpsd5cdff33.jpg)
![[Image: spindle_zps4cb01276.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/spindle_zps4cb01276.jpg)
The spindle had been modified, the threaded portion of the pulley end had been removed, the other end had been shortened by about half an inch and two 1/16" sleeves had been added to accommodate oversize bearings. Fortunately, the original bearing diameters had been left standard so I turned off the sleeves and replaced the with the bearings I'd bought in advance!
2 x'MJ 7/8' or 'RMS7':-
ID=7/8th inch, 22.225mm
OD=2.25 inch, 57.15mm
WIDTH=11/16th inch (0.6875 inch), 17.463mm
I fabricated a pivoting motor mount to accommodate the different pulley sizes
![[Image: mount1_zps20c576da.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/mount1_zps20c576da.jpg)
![[Image: mount3_zps9892306b.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/mount3_zps9892306b.jpg)
By using a 40 tooth and a 60 toothed pulley on the motor driveing 28 toothed pulleys at 2800rpm, my spindle speed can be either 4000rpm or 6000rpm, well within the limits of the greased bearing specification.
![[Image: pullies_zpsac20e852.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/pullies_zpsac20e852.jpg)
One of the pulleys I turned out the inside to be able to use the other as a hub to fit them to the spindle
![[Image: pulleys_zps4fbd7db5.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/pulleys_zps4fbd7db5.jpg)
I did the same thing with the 40 and 60 toothed pulleys, but I forgot to take pictures!
![[Image: final_zps581e7012.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/final_zps581e7012.jpg)
6000rpm position
![[Image: final3_zps581e7012.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/final3_zps581e7012.jpg)
Belt change.
![[Image: final2_zpsb6e914cd.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/final2_zpsb6e914cd.jpg)
4000rpm position
I found the adjuster mechanism difficult to photograph, I placed the pivot at the bottom so that there would not be much of a changing the level of the pulleys allowing the belt guard to work unmodified. The adjustment of the belt uses a split cotter which allows quick "spanner" free speed changes.
![[Image: adjuster_zps16e64f0b.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/adjuster_zps16e64f0b.jpg)
![[Image: adjuster3_zps642980a5.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/adjuster3_zps642980a5.jpg)
![[Image: adjuster5_zpsa6b39498.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/adjuster5_zpsa6b39498.jpg)
![[Image: adjuster2_zps39fc5e06.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/adjuster2_zps39fc5e06.jpg)
![[Image: contacter_zpsdebbb895.jpg]](http://i917.photobucket.com/albums/ad16/mattinker/contacter_zpsdebbb895.jpg)
Last but not least, the contacter with the red button a knee height!
Yes a lick of paint is in order, but the essential is there! it works!
Regards, Matthew
I was dumb enough to put this in my last post. Well, I made the "small bit holder" for my Clarkson T&C, I went to try it out and guess what, the magic white smoke escaped! "notchy" bearings had gone too far. So I've been obliged to change the bearings and the motor.
I had gathered together the bits to make a two speed set up with a 380volt three phase motor. When I looked more closely, I found a very UN-original belt and pulley set up. I wasn't getting the 4000rpm spindle speed with the pulleys as was.
![[Image: aswas_zpsd5cdff33.jpg]](http://s917.photobucket.com/user/mattinker/media/aswas_zpsd5cdff33.jpg.html)
![[Image: spindle_zps4cb01276.jpg]](http://s917.photobucket.com/user/mattinker/media/spindle_zps4cb01276.jpg.html)
The spindle had been modified, the threaded portion of the pulley end had been removed, the other end had been shortened by about half an inch and two 1/16" sleeves had been added to accommodate oversize bearings. Fortunately, the original bearing diameters had been left standard so I turned off the sleeves and replaced the with the bearings I'd bought in advance!
2 x'MJ 7/8' or 'RMS7':-
ID=7/8th inch, 22.225mm
OD=2.25 inch, 57.15mm
WIDTH=11/16th inch (0.6875 inch), 17.463mm
I fabricated a pivoting motor mount to accommodate the different pulley sizes
![[Image: mount1_zps20c576da.jpg]](http://s917.photobucket.com/user/mattinker/media/mount1_zps20c576da.jpg.html)
![[Image: mount3_zps9892306b.jpg]](http://s917.photobucket.com/user/mattinker/media/mount3_zps9892306b.jpg.html)
By using a 40 tooth and a 60 toothed pulley on the motor driveing 28 toothed pulleys at 2800rpm, my spindle speed can be either 4000rpm or 6000rpm, well within the limits of the greased bearing specification.
![[Image: pullies_zpsac20e852.jpg]](http://s917.photobucket.com/user/mattinker/media/pullies_zpsac20e852.jpg.html)
One of the pulleys I turned out the inside to be able to use the other as a hub to fit them to the spindle
![[Image: pulleys_zps4fbd7db5.jpg]](http://s917.photobucket.com/user/mattinker/media/pulleys_zps4fbd7db5.jpg.html)
I did the same thing with the 40 and 60 toothed pulleys, but I forgot to take pictures!
![[Image: final_zps581e7012.jpg]](http://s917.photobucket.com/user/mattinker/media/final_zps581e7012.jpg.html)
6000rpm position
![[Image: final3_zps581e7012.jpg]](http://s917.photobucket.com/user/mattinker/media/final3_zps581e7012.jpg.html)
Belt change.
![[Image: final2_zpsb6e914cd.jpg]](http://s917.photobucket.com/user/mattinker/media/final2_zpsb6e914cd.jpg.html)
4000rpm position
I found the adjuster mechanism difficult to photograph, I placed the pivot at the bottom so that there would not be much of a changing the level of the pulleys allowing the belt guard to work unmodified. The adjustment of the belt uses a split cotter which allows quick "spanner" free speed changes.
![[Image: adjuster_zps16e64f0b.jpg]](http://s917.photobucket.com/user/mattinker/media/adjuster_zps16e64f0b.jpg.html)
![[Image: adjuster3_zps642980a5.jpg]](http://s917.photobucket.com/user/mattinker/media/adjuster3_zps642980a5.jpg.html)
![[Image: adjuster5_zpsa6b39498.jpg]](http://s917.photobucket.com/user/mattinker/media/adjuster5_zpsa6b39498.jpg.html)
![[Image: adjuster2_zps39fc5e06.jpg]](http://s917.photobucket.com/user/mattinker/media/adjuster2_zps39fc5e06.jpg.html)
![[Image: contacter_zpsdebbb895.jpg]](http://s917.photobucket.com/user/mattinker/media/contacter_zpsdebbb895.jpg.html)
Last but not least, the contacter with the red button a knee height!
Yes a lick of paint is in order, but the essential is there! it works!
Regards, Matthew
mattinker, proud to be a member of MetalworkingFun Forum since Jan 2013.
![[Image: TomsTechLogo-Profile.png]](http://tomstechniques.com/wp-content/uploads/2013/11/TomsTechLogo-Profile.png)
and you amassed -11 posts 
