New Rotor Bearings Too Tight?
04-24-2004 | 04:03 AM
#1
Thread Starter
Senior Member
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
E shaft is SUPER tight on the fresh rotor bearings... Do you have to sand/polish new bearings? I don't own a micrometer to find out any hard #s. 1 thing I have learned is I will never ever get fresh bearings again. what a pain in the ***.
04-24-2004 | 05:54 AM
#2
Senior Member
Joined: Jun 2003
Posts: 406
Hmm that doesnt sound to good to me, but wait for someone more experienced to post. I'd like to know what problems you encounterd besides them being to snug, as im going to be doing mail bearing soon and would like to know what you had trouble with on the rotors. Is it possible that they were like warped a little or something when you pressed them in maybe?
04-24-2004 | 08:42 AM
#3
Senior Member
Joined: May 2002
Posts: 4,928
From: Okinawa, Japan
Which part number did you get? There are 3 bearing sizes. Bearings should NEVER be tight. I used new rotor bearings in my current motor...they weren't tight at all...and I still think I used the size too BIG.
04-24-2004 | 09:34 AM
#4
Thread Starter
Senior Member
Joined: Oct 2001
Posts: 10,906
From: Peoria, AZ
I just ordered them from mazdatrix. They only list 1 bearing.http://www.mazdatrix.com/b4.htm
The new bearings on the gears fit fine.
The new bearings on the gears fit fine.
04-24-2004 | 12:05 PM
#5
Senior Member
Joined: Jun 2003
Posts: 917
From: Grand Prairie, TX
Were you assembling the engine with the rotor housings already laid down prior to putting the rotor in or doing it w/o the rotor housing on and putting the rotor on first? If you're doing it w/ the rotor housing already down then sliding a rotor on, it might be difficult to get the thing on as the rotor won't have much side-to-side play to let you slide it on evenly. I usedf to assemble engines like that but now I don't -- I wait to put the rotor housing on after I have the rotor on. It helps prevent scratching and binding the rotor bearing on the e-shaft.
B
B
04-24-2004 | 02:18 PM
#7
Super Moderator
Joined: Sep 2002
Posts: 2,763
From: Savannah, Ga
A micrometer would be worth the money, along with a set of things to measure the inside dimension(i remt remember their name).
But those would only tell you when you already know in this case. It should move freely granted it was lubed with vaseline before you put it together. If it doesnt, you need to make it move freely. Ive built a few motors with new bearings, and Ive never had a problem. But I still always measured them first.
But those would only tell you when you already know in this case. It should move freely granted it was lubed with vaseline before you put it together. If it doesnt, you need to make it move freely. Ive built a few motors with new bearings, and Ive never had a problem. But I still always measured them first.
