thehorse 221 #1 Posted September 1, 2017 In the photo you can see the main pulley on the blower. Not sure the purpose of the part on pointing at. It has a set screw and appears to be a kind of bearing cap with no seal. It's just loosely riding on the shaft. Thanks in advance. Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,032 #2 Posted September 1, 2017 If you look at the extended inner race of the bearing as you turn the shaft the OD of the inner race is not centered on the shaft. The loose collar has a matching off-centre counterbore that fits over the one on the bearing. The collar should also have a hole on the outside so you can use a hammer and punch to turn the collar to literally jamb to two eccentrics. You tap the collar in the direction of shaft rotation. This all locks the bearing to the shaft. Then tighten the set screw. Make sense? Garry 1 1 Share this post Link to post Share on other sites
thehorse 221 #3 Posted September 2, 2017 Some.. .I'll have to look and see if the is a bearing surface on the race for the collar to fit on..... Thanks for pic and great info Share this post Link to post Share on other sites
thehorse 221 #4 Posted September 2, 2017 So to clarify...it spins on??? Share this post Link to post Share on other sites
cleat 5,809 #5 Posted September 2, 2017 Yes, in the same direction the shaft spins in normal operation. This locks the center of the bearing to the shaft keeping it from spinning in the bearing. Cleat 1 Share this post Link to post Share on other sites
thehorse 221 #6 Posted September 2, 2017 Again.....thanks guys!!!! Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,032 #7 Posted September 2, 2017 Spin but it will be less than one turn. You need to get the collar over the bearing inner race so turn the collar back and forth 1/2 to 3/4 of a turn until it slides on. Then turn the collar in the direction of rotation that the shaft runs in operation 1/2 to 3/4 of a turn and tap it tight. Tighten screw. This would be a good application for Neversieze between the bearing and shaft and the bearing and collar but you can't do that now with the bearing on the shaft. The bearing is likely already seized to the shaft by rust. Perhaps oil everything up good before you slide the collar on and it will prevent further rusting or even release the bearing from the shaft with normal use. Garry 1 Share this post Link to post Share on other sites
thehorse 221 #8 Posted September 5, 2017 Ugh! Spent an hour on this and no luck!! I'll keep trying but may need a beer! Share this post Link to post Share on other sites
thehorse 221 #9 Posted September 5, 2017 When I get the collar centered and try and turn it, the whole bearing/race spins also...... Share this post Link to post Share on other sites
gwest_ca-(File Mod) 11,032 #10 Posted September 5, 2017 10 hours ago, thehorse said: When I get the collar centered and try and turn it, the whole bearing/race spins also...... The whole bearing or just the inner race? If just the inner race don't worry about it. Make sure the collar is going over the extended inner race and hold it tight to the bearing as you tighten the set screw. Now the inner race has to turn with the shaft rather than on the shaft. If the whole bearing is turning the 3-bolt flanges are not clamping the outer race tight enough. Maybe remove the bolts and see if rust can be removed from the flanges and/or chassis to clamp the bearing tighter. With the flanges off you could spin the bearing to check the condition of the balls inside. It should turn nice and smooth. The outer race of these bearings is curved and equal to a ball the size of the outer race OD. This allows the bearing assembly to be mounted relative to the shaft and why they are called self-aligning. The shaft does not have to be square in the chassis for the bearing to work. Let us know how you make out. Garry Share this post Link to post Share on other sites
