Jump to content



Photo

will these belts work in a RC-M70?


  • Please log in to reply
11 replies to this topic

#1 dan

dan
  • Members (SA)
  • 64 posts

Posted 09 April 2019 - 12:11 AM

i need to change the belts but all i can find in canada is...

 

 

main belt:

FBS9.6 Flat Belt Small

 

 

and

 

counter belt:

SBS7.0 Square Belt Small SCX7.0

 

will these work properly?

 

from what i gather, the main belt should be flat belt medium 9.6 and the counter belt should be a square belt extra small 7.0.

 

 

 

 

 



#2 Fatdog

Fatdog
  • Administrators
  • 10,806 posts
  • LocationMiddle Tennessee, U.S.A.

Posted 09 April 2019 - 11:21 AM

I would say the square belt should work fine.  It's not that much bigger than the recommended size.

 

The flat belt might work just fine, but I would worry about it not have enough surface area to work correctly - 3mm vs 5mm.



#3 dan

dan
  • Members (SA)
  • 64 posts

Posted 09 April 2019 - 12:13 PM

what about a 9.2 Belt Flat Medium? it's the closest i could find on that site.

 

 

• Inside Diameter: 9.3 Inches
• Thickness 0.6mm ✓ Width: 5.3mm

 

https://kpcomponents...t-medium-frm9-3



#4 Superduper

Superduper
  • Boomus Fidelis
  • 6,867 posts
  • LocationSomewhere over the rainbow, USA

Posted 09 April 2019 - 12:17 PM

It’s too wide. You need .139” or narrower, which is just a tad wider than 1/8”. The clutch pulley won’t accept any belt wider than that without rubbing or getting caught.

Belts are getting harder to find all the time. If that site doesn’t have it, go to another.

#5 dan

dan
  • Members (SA)
  • 64 posts

Posted 09 April 2019 - 12:26 PM

which one is wide?  SBS 7.0?

 

 

what a about these?

 

 

https://kpcomponents...ra-small-scy6-6

 

 

https://kpcomponents...ra-small-scy7-7



#6 Fatdog

Fatdog
  • Administrators
  • 10,806 posts
  • LocationMiddle Tennessee, U.S.A.

Posted 09 April 2019 - 01:17 PM

The 9.2 belt will be too tight and put stress on the motor.

 

The difference between the small (X) and extra small (Y) for the counter belt is minimal.  I wouldn't sweat it on the counter belt.

 

Y = .035-.039
X = .040-.049



#7 caution

caution
  • Members (SA)
  • 1,954 posts
  • LocationHillsboro, Oregon

Posted 09 April 2019 - 01:53 PM

I used this place, they spec these for the M70

SBO7.0 and FBS9.6



#8 Transistorized

Transistorized
  • Members (SA)
  • 1,610 posts
  • LocationUSA

Posted 09 April 2019 - 03:33 PM

I don't recall where I got this main drive belt for my M70. I had a heck of a time buying at least 2 belts off eBay that were for a "M70" but were too wide. The belt pictured below was the only belt I got that matched the width and it was NOS.

 

Attached File  20190409_172827.jpg   59.96K   3 downloads

 

I have it vacuum sealed and in a drawer away from UV in hope that it's still good when I need it. It matches the current belt that works and the way I use my equipment, am sure to need it in the future.



#9 dan

dan
  • Members (SA)
  • 64 posts

Posted 13 April 2019 - 04:22 PM

would this belt be too wide?

 

FBM-9.6 9.6" x 0.2" FLAT BELT (5.10mm wide)

 

https://www.consumer...BELT-FBM-96.htm



#10 Fatdog

Fatdog
  • Administrators
  • 10,806 posts
  • LocationMiddle Tennessee, U.S.A.

Posted 13 April 2019 - 04:41 PM

Personally, I would go with that one.  :yes:



#11 dan

dan
  • Members (SA)
  • 64 posts

Posted 18 April 2019 - 12:36 AM

Personally, I would go with that one.  :yes:

 

the FBM-9.6 9.6" x 0.2" FLAT BELT (5.10mm wide) was too wide.  the original belt was 3mm wide. i used a FBS-9.6, FBS9.6 (FRX9.6) 9.6" X 0.11" FLAT BELT which was 2.8mm wide. i have a 3mm wide one on the way, maybe i'll change it out when it arrives.



#12 Superduper

Superduper
  • Boomus Fidelis
  • 6,867 posts
  • LocationSomewhere over the rainbow, USA

Posted 18 April 2019 - 01:39 PM

On post #4 of this thread, I already told you that you need a belt 0.139" or narrower.  On post #8 of this thread, transistorized showed you a photo of a belt he ordered which matched the original and the package shows the belt was 0.139" wide.  

 

Instead you ordered a belt 0.2" wide.  AND what happened?  It's too wide.