Spherical Staking Force

[salad]

Hi guys, we're having a bit of trouble with our staked sphericals at the moment. We thought we'd gotten the right force to stake them with, but one of them has just fallen out http://fsae.com/groupee_common/emoticons/icon_frown.gif

We were using around 4tonnes to stake them (AWC-4TG). All our chamfers were as Aurora recommended in their catalogue. Just wondering what sort of forces the rest of you guys using staked sphericals have been using.

Cheers
Showza

[salad]

Hi guys, we're having a bit of trouble with our staked sphericals at the moment. We thought we'd gotten the right force to stake them with, but one of them has just fallen out http://fsae.com/groupee_common/emoticons/icon_frown.gif

We were using around 4tonnes to stake them (AWC-4TG). All our chamfers were as Aurora recommended in their catalogue. Just wondering what sort of forces the rest of you guys using staked sphericals have been using.

Cheers
Showza

[RacingManiac]

For our COM-3T, we just use a 2-tonnes press to press them in. But we do use the green Loctite retaining compound in conjunction with the the pressing.....Worked for us thus far with no issue...

[Brian Schien]

Did you make your staking tools or buy them. We bought ours and followed the directions and everything worked perfect the instructions said apply five ton load with both tools we even did a test stake and it took around 7 tons to push it out. I don't know the specs on the spherical we used but you have a tolerance of 4 tens on hole size. We honed ours to size using gage pins to check

[Pico]

Where did you buy your staking tools? We had a problem this year with all our bearings popping out. We had forgotten to put the chamfer on the sides of the holes. We had made our own staking tools but they become obsolete after about 30 pressings.Do you have the holes lasercut? Loctite 680 is a lifesaver!

[RacingManiac]

Our holes were reamed with a special reamer which brings it to the exact size for the com-3t pressfit....I am almost ashamed to say it but we tend to just use sockets for our process....

[ibanezplayer]

While staking the bearing do you follow the procedure (http://www.aurorabearing.com/Files/aurora-bearing-technical-data.pdf) where you rotate the piece that the bearing is being staked into?

Aurora recommends staking, then rotating 90 degrees, until you reach 360 degrees of rotation.

We also use loctite, I'm pretty sure it's 680, but I'm not 100%. Every time we've had a bearing come out it was always from our own negligence. Usually with the initial manufacturing of the part.

[Brian Schien]

We bought our staking tools from high performance vehicle engineering in Easton Pa

[Adambomb]

Yeah, we do exactly the same thing Racing Maniac mentioned with zero problems for years. Just ream them to make sure they are absolutely precisely as close to the proper size as possible (within 0.0005 in.), then just make sure they are nice a clean and press them in with permanent lock tight.