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Quad Roller Skating Forum Discussions about quad roller skates and any other quad skating discussions that do not seem appropriate for one of our other forums.

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Old December 4th, 2017, 02:53 AM   #21
amohrfeld
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I can tell the difference between clean bearings and dirty bearings. I can also tell the difference between high end / ceramic bearings and low cost bearings like bones reds.

However the difference is so small that I ignore it.

There are so many other features on a skate that that require attention and tweaking that the bearing difference is almost irrelevant until you sort out the other details. I've been playing with skates for the past 18 months. I'm up to 7 pairs of skates with a bunch of parts lying around and still haven't found the ideal boot or plate size and mount location (but I keep getting closer). Once I finally settle on a setup I'll start looking again at bearings and wheel spacers.
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Old December 4th, 2017, 11:35 PM   #22
RollerBones
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There are only 2 micro bearing manufacturer's in Switzerland. One in which Bones has the exclusive rights to use and anther called Jessa. At this point in time I only think Bont is utilizing their manufacturer leaving all these other "Swiss" bearings as phonies. Anyone can buy an , lets say ABEC and change the shield to say whatever you want unfortunately, this market isn't regulated so much...

Just FYI:

rb
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Old December 5th, 2017, 03:19 PM   #23
BeechCreekGary
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Quote:
Originally Posted by ursle View Post
Welcome, great first post, I need a time machine to keep up, six years ago, things change
Do you have a link to the time machine you currently use?
.............................................

No offense Gary, just time traveling.
None taken.
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Old December 9th, 2017, 01:18 AM   #24
Edward Williams
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Quote:
Originally Posted by RiedellSk8r View Post
i know there are alot of other threads about bearings, but i was curious as to the comparison between the bone swiss bearings and the qube ceramic bearings? i know the qube use a grease and the bones use a cream.

i was just curious as to which one would be better for speed skating? or which is faster. i also know the qube are ''above abec'' rating, and the bone swiss are skate rated
Why not compare like for like...bones ceramics with qube ceramics?
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Old December 14th, 2017, 07:13 AM   #25
Mort
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@ amohrfeld

I can believe the dirty vs clean, but not the cheap vs expensive bearings. Unless you're talking about loose ball semi precision s vs precision bearings. Lol


There are a lot of things to consider when comparing bearings. I skip bearing build quality and go to the important and probably the most critical. Overall assembly precision.

Internal clearances on a bearing, and how straight the axles are, the preciseness of the trucks face which applies axial loads during skating, and last but definitely not least, the concentricy of the bearing bores in your wheels hub. Only if all those things are truely perfect can you really compare bearings outside of a testing rig.

Running and starting torque can vary wildly depending on the internal clearances available in a bearing. When you have errors in the alignment between the 2 bearings due to out of alignment parts, a bearing with more internal clearances will have significantly less drag.

I've had qube 8 ball bearings in a couple sets of wheels, these bearings are rather snug on their internal clearances compared to say a bones red bearing. So in plastic hubs with not so great bores, free spin decreased significantly over the bones reds. Now if they are both cleaned and oiled, putting them both in a precision hub, such as a "Faster" hub, or Aussie scott or SureGrip Zombie will result in near identical free spin. Under load however since the wheel assembly is already very true, the reduction of axial play could potentially help give better roll.

Also not all aluminum hubs have good bearing bores.

I would love to have some perfectly true hubs with poured on scott urethane, with 100% straight plates /axles, etc. Then a inspected/verified set of bottom of the barrel barely in an abec1 rating bearing with maximum tolerances allowed for runouts and concentricy etc. To roll against a ABEC 9 set with identical internal clearances as the poor set, but with perfectly made raceways, balls, etc. Ya know the internal geometry being on the opposite end of the crappy set. Both with the same cage/retainers and non contact seals/shields using the same light oil.

Most major bearing suppliers have criteria that they meet for their higher ABEC rated bearings which aren't actually covered by a "abec" standard of tolerances. Like radial run out, ring concentricy, etc.
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