25 mm wheel bearing change
Thread Starter
|
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
25 mm wheel bearing change
Recently tried to purchase a front 25 mm bore ball bearing at the H-D dealership to mate with the single bearing purchased on Oct. 18, last year, p/n 9276A.
The bearing has been superseded to p/n 9276B.
The "A" bearing incorporates a molded rubber seal.
The new "B" bearing uses a metal shield.
AST bearing company has a white paper publishers on the subject of bearing rubber seals and metal shields.
The "A" bearing uses a type 2RS rubber seal that creates drag between the inner and outer ring from friction.
The "B" bearing uses a type ZZ non removal pressed metal shield that creates zero drag between the inner and ring.
However, the "A" bearing with the rubber seal provides better protection in contaminated environments than the metal shield type.
Contacted four H-D local dealerships and none had the "A" version on the shelf and are now stocking the updated "B"" version.
This part must be a fast turn over item, since the updated version has been in affect since October of last year.
Must be an MPG thing or maybe a cost reduction measure.
The packing on both bearings say made in South Korea.
Any thoughts on the pros and cons of rubber sealed bearing vs metal shielded bearing.
The bearing has been superseded to p/n 9276B.
The "A" bearing incorporates a molded rubber seal.
The new "B" bearing uses a metal shield.
AST bearing company has a white paper publishers on the subject of bearing rubber seals and metal shields.
The "A" bearing uses a type 2RS rubber seal that creates drag between the inner and outer ring from friction.
The "B" bearing uses a type ZZ non removal pressed metal shield that creates zero drag between the inner and ring.
However, the "A" bearing with the rubber seal provides better protection in contaminated environments than the metal shield type.
Contacted four H-D local dealerships and none had the "A" version on the shelf and are now stocking the updated "B"" version.
This part must be a fast turn over item, since the updated version has been in affect since October of last year.
Must be an MPG thing or maybe a cost reduction measure.
The packing on both bearings say made in South Korea.
Any thoughts on the pros and cons of rubber sealed bearing vs metal shielded bearing.
Recently tried to purchase a front 25 mm bore ball bearing at the H-D dealership to mate with the single bearing purchased on Oct. 18, last year, p/n 9276A.
The bearing has been superseded to p/n 9276B.
The "A" bearing incorporates a molded rubber seal.
The new "B" bearing uses a metal shield.
AST bearing company has a white paper publishers on the subject of bearing rubber seals and metal shields.
The "A" bearing uses a type 2RS rubber seal that creates drag between the inner and outer ring from friction.
The "B" bearing uses a type ZZ non removal pressed metal shield that creates zero drag between the inner and ring.
However, the "A" bearing with the rubber seal provides better protection in contaminated environments than the metal shield type.
Contacted four H-D local dealerships and none had the "A" version on the shelf and are now stocking the updated "B"" version.
This part must be a fast turn over item, since the updated version has been in affect since October of last year.
Must be an MPG thing or maybe a cost reduction measure.
The packing on both bearings say made in South Korea.
Any thoughts on the pros and cons of rubber sealed bearing vs metal shielded bearing.
The bearing has been superseded to p/n 9276B.
The "A" bearing incorporates a molded rubber seal.
The new "B" bearing uses a metal shield.
AST bearing company has a white paper publishers on the subject of bearing rubber seals and metal shields.
The "A" bearing uses a type 2RS rubber seal that creates drag between the inner and outer ring from friction.
The "B" bearing uses a type ZZ non removal pressed metal shield that creates zero drag between the inner and ring.
However, the "A" bearing with the rubber seal provides better protection in contaminated environments than the metal shield type.
Contacted four H-D local dealerships and none had the "A" version on the shelf and are now stocking the updated "B"" version.
This part must be a fast turn over item, since the updated version has been in affect since October of last year.
Must be an MPG thing or maybe a cost reduction measure.
The packing on both bearings say made in South Korea.
Any thoughts on the pros and cons of rubber sealed bearing vs metal shielded bearing.
the jury is still out on the metal ones but the timkins are a certified win. No if, ands, or buts...just win.
Sporty metals:
https://www.hdforums.com/forum/showp...&postcount=190
Self-inflicted Dyna bearing disaster:
https://www.hdforums.com/forum/showp...&postcount=462
Timkin 205pp:
http://Timken 205PP Ball Bearing, Do..._7nKByb22M1FR2
Fun times
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
I think you'll find they are stock universal bearings, available at most bearing stockists. No need to worry about Harley procurement. When I needed wheel bearings for my Buell my local Yamaha dealer had them in stock! Take one with you as the numbers engraved on them will ensure you get the correct size and type.
Thread Starter
|
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Difficult to understand why a molded rubber seal could fail.
Remember a conversion with an engr at Chicago Rawhide many years ago.
indicated if the sealing surface on the dynamic rubber seal was too smooth, the rubber would over heat and fail. BunaN is good to 240F.
Have placed a wheel hub in the kitchen oven at 220F to expand aluminum to remove stubborn sealed hub ball bearing.
Geeting a single rubber sealed ball bearing at a specialized bearing retailer based on the bearing # is an option, and by pass H-D
However, really bummed out that H-D changed the bearing from rubber seal to metal jacket that allows much more road dust to enter bearing.
Remember a conversion with an engr at Chicago Rawhide many years ago.
indicated if the sealing surface on the dynamic rubber seal was too smooth, the rubber would over heat and fail. BunaN is good to 240F.
Have placed a wheel hub in the kitchen oven at 220F to expand aluminum to remove stubborn sealed hub ball bearing.
Geeting a single rubber sealed ball bearing at a specialized bearing retailer based on the bearing # is an option, and by pass H-D
However, really bummed out that H-D changed the bearing from rubber seal to metal jacket that allows much more road dust to enter bearing.
Thread Starter
|
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Difficult to understand why a molded rubber seal could fail.
Remember a conversion with an engr at Chicago Rawhide many years ago.
indicated if the sealing surface on the dynamic rubber seal was too smooth, the rubber would over heat and fail. BunaN is good to 240F.
Have placed a wheel hub in the kitchen oven at 220F to expand aluminum to remove stubborn sealed hub ball bearing.
Getting a single rubber sealed ball bearing at a specialized bearing retailer based on the bearing # is an option, and by pass H-D
However, really bummed out that H-D changed the bearing from rubber seal to metal jacket that allows much more road dust to enter bearing.
There is a measurable amount drag on the 25mm ball bearing with rubber seal times four bearings adds up.
Remember a conversion with an engr at Chicago Rawhide many years ago.
indicated if the sealing surface on the dynamic rubber seal was too smooth, the rubber would over heat and fail. BunaN is good to 240F.
Have placed a wheel hub in the kitchen oven at 220F to expand aluminum to remove stubborn sealed hub ball bearing.
Getting a single rubber sealed ball bearing at a specialized bearing retailer based on the bearing # is an option, and by pass H-D
However, really bummed out that H-D changed the bearing from rubber seal to metal jacket that allows much more road dust to enter bearing.
There is a measurable amount drag on the 25mm ball bearing with rubber seal times four bearings adds up.
Difficult to understand why a molded rubber seal could fail.
Remember a conversion with an engr at Chicago Rawhide many years ago.
indicated if the sealing surface on the dynamic rubber seal was too smooth, the rubber would over heat and fail. BunaN is good to 240F.
Have placed a wheel hub in the kitchen oven at 220F to expand aluminum to remove stubborn sealed hub ball bearing.
Getting a single rubber sealed ball bearing at a specialized bearing retailer based on the bearing # is an option, and by pass H-D
However, really bummed out that H-D changed the bearing from rubber seal to metal jacket that allows much more road dust to enter bearing.
There is a measurable amount drag on the 25mm ball bearing with rubber seal times four bearings adds up.
Remember a conversion with an engr at Chicago Rawhide many years ago.
indicated if the sealing surface on the dynamic rubber seal was too smooth, the rubber would over heat and fail. BunaN is good to 240F.
Have placed a wheel hub in the kitchen oven at 220F to expand aluminum to remove stubborn sealed hub ball bearing.
Getting a single rubber sealed ball bearing at a specialized bearing retailer based on the bearing # is an option, and by pass H-D
However, really bummed out that H-D changed the bearing from rubber seal to metal jacket that allows much more road dust to enter bearing.
There is a measurable amount drag on the 25mm ball bearing with rubber seal times four bearings adds up.
i only used the metal ones to test them out. I would have used timkin otherwise. The hd rubber/plastic ones were trash to begin with. You come out on top with the german timkins.
Thread Starter
|
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Since the rubber sealed bearings are low quality is the reason the dealers do not have any inventory because they had to be replaced the "A" type until the bearing was up graded.
Still would vote for a good quality SKF ball bearing over a tapered roller bearing, no preload, pre lubricated, less rolling resistance.
Still would vote for a good quality SKF ball bearing over a tapered roller bearing, no preload, pre lubricated, less rolling resistance.
Trending Topics
Since the rubber sealed bearings are low quality is the reason the dealers do not have any inventory because they had to be replaced the "A" type until the bearing was up graded.
Still would vote for a good quality SKF ball bearing over a tapered roller bearing, no preload, pre lubricated, less rolling resistance.
Still would vote for a good quality SKF ball bearing over a tapered roller bearing, no preload, pre lubricated, less rolling resistance.
http://www.surdyke.com
https://shop.newcastlehd.com
http://www.boardtrackerharleyonline.com
they may still have some on hand.
Last edited by cvaria; Jan 5, 2017 at 05:37 PM.
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider
Verdad Gallardo
Thread Starter
|
Tourer
Joined: Oct 2016
Posts: 297
Likes: 19
From: Central CA
Would guess that most if not all the aftermarket motorcycle parts suppliers such as J P Cycles supply the rubber seal version of the bearing and also ebay for 1/2 the price of H-D bearing.
Ordered a rubber sealed Timken 205PP on Amazon today.
Ordered a rubber sealed Timken 205PP on Amazon today.
Last edited by Almond farmer; Jan 6, 2017 at 10:27 AM.