ms660 case bearing sizes

[Grant Aus]

Hi guys, Long time reader but my first post.

There seems to be a current bearing issue with the huztl ms660 kit saw,

if you have a set of cases split with the bearings out would you mind measuring the bore size for the bearings. im trying to rule out a case machining undersize error and the bearing being installed at the factory,

My case on the nylon cage bearing side is measuring .08 interference fit after it has been removed so it may well have been tighter to start with. 39.92mm

yes i am replacing with oem bearings/seals for this build

 

[BuckthornBonnie]

Want the OEM size?

 

[Grant Aus]

OEM size or aftermarket will help determine if my case has been machined undersize so yes please

 

[BuckthornBonnie]

PTO- 39.97

Flywheel- 39.89

I don’t really trust my calipers or technique, but I was curious myself. OEM used cases.

 

[Grant Aus]

39.97 is correct size, the case in question was replaced by the aftermarket manufacturer with one that has a cast iron insert on the clutch side