SPARC Forum

Tech => Questions => Topic started by: 18hvenhuizen on February 01, 2017, 02:50:04 pm

Title: Needle Bearing Mounting?
Post by: 18hvenhuizen on February 01, 2017, 02:50:04 pm
I'm trying to design a drum, but I'm not quite sure how I'm suppose to mount to my needle bearings. There will be a fixed shaft with three or four needle bearings attached somehow to my drum. The drum will have a pulley that will be attached to our motor via a belt drive. How do I attach my drum to the needle bearings? I can't exactly weld without damaging the bearings. Do I use a huh of some sort? What am I looking to do to attach bearings to a drum?
Title: Re: Needle Bearing Mounting?
Post by: Koolaid64 on February 01, 2017, 05:04:20 pm
what you need to do is called a press fit. make your hole about .002 undersized of the bearings dia. then use a arbor press to push it in.

-Kyle
Title: Re: Needle Bearing Mounting?
Post by: rcjunky on February 02, 2017, 02:37:23 am
2 thou press might be a bit tight, but yes, they're held in with an interference between the bearing and part. To do this you'll typically use a reamer to ream the hole and press the bearing into said hole.
Title: Re: Needle Bearing Mounting?
Post by: Camo5 on April 11, 2017, 11:40:02 pm
alternatively, if the bearings slide around and you have enough space, you can

a: put c-pins on each side of the drum and shaft (4 pins, 2 inner and 2 outer)
b: thread some holes super close to the bearing hole, so that the head of the screws overlap the outer bearing race, holding it in place.