I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining applications?


Cheers.

On 03/19/2015 8:22 AM, Bogus wrote:
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?

It _might_ stay in position if there's never any end load at all while
running, but if it's important the first solution is the right one; use
a snap ring would be my recommendation.

--

"Bogus" wrote in message
...
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to
not exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?

In my experience those clips are hard to keep straight unless you have
a guided tool to press them on evenly, like a small 1/4" drive socket.
They make a mess of the shaft if you have to move or replace them. I'd
try set screw collars first, with a snip of solder or string trimmer
line under the setscrew to protect the shaft. You could turn a
shoulder on the side to clear the shield.
http://www.amazon.com/Climax-Metal-L...C2W8Q9ZX4FGWNX
$0.64 each.

-jsw

On Thu, 19 Mar 2015 18:45:12 -0400, "Jim Wilkins"
wrote:

"Bogus" wrote in message
...
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to
not exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?

In my experience those clips are hard to keep straight unless you have
a guided tool to press them on evenly, like a small 1/4" drive socket.
They make a mess of the shaft if you have to move or replace them. I'd
try set screw collars first, with a snip of solder or string trimmer
line under the setscrew to protect the shaft. You could turn a
shoulder on the side to clear the shield.
http://www.amazon.com/Climax-Metal-L...C2W8Q9ZX4FGWNX
$0.64 each.

-jsw

The center race always stands slightly proud of the sheild, so using a
(hardned) washer against the bearing and driving the spring retainer
up against the washer would do the job - but as stated it's really
easy to damage the shaft. What's wrong with spacing the shaft using a
tube sleave over the shaft to locate the bearings - requiting only 1
"retainer" at each end of the shaft, which can be as simple as
threading the end of the shaft and using a nut? Fine adjustment of
position can be done with thin shim washers, and dissassembly is
simple and damage free any time in the future.
If a nut isn't fesible, drill the end of the shaft and tap it for a
hex-head cap screw.

wrote in message
...
On Thu, 19 Mar 2015 18:45:12 -0400, "Jim Wilkins"
wrote:

"Bogus" wrote in message
...
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft
and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when
handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as
to
not exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?

In my experience those clips are hard to keep straight unless you
have
a guided tool to press them on evenly, like a small 1/4" drive
socket.
They make a mess of the shaft if you have to move or replace them.
I'd
try set screw collars first, with a snip of solder or string trimmer
line under the setscrew to protect the shaft. You could turn a
shoulder on the side to clear the shield.
http://www.amazon.com/Climax-Metal-L...C2W8Q9ZX4FGWNX
$0.64 each.

-jsw

The center race always stands slightly proud of the sheild, so using
a
(hardned) washer against the bearing and driving the spring retainer
up against the washer would do the job - but as stated it's really
easy to damage the shaft. What's wrong with spacing the shaft using
a
tube sleave over the shaft to locate the bearings - requiting only 1
"retainer" at each end of the shaft, which can be as simple as
threading the end of the shaft and using a nut? Fine adjustment of
position can be done with thin shim washers, and dissassembly is
simple and damage free any time in the future.
If a nut isn't fesible, drill the end of the shaft and tap it for a
hex-head cap screw.

The automotive replacement brake line we'e been discussing is an easy
local source of steel tubing.

Perhaps you could make the end clamps from 1/4" brass compression
fittings.

-jsw

On Thu, 19 Mar 2015 21:22:49 +0800, Bogus wrote:

I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

I strongly doubt it. Those and the twin V style are usually
considerably larger in OD, likely as large as the outer race.

Consider trying some Loctite. 680 and 640 might work. (I've never
tried this.)


Is there a standard name for these clips for bearing retaining applications?

Yeah, "bearing retainers". sorry, hadda do it

--
Always bear in mind that your own resolution to
succeed is more important than any one thing.
-- Abraham Lincoln

On 20-Mar-15 1:16 PM, Larry Jaques wrote:
On Thu, 19 Mar 2015 21:22:49 +0800, Bogus wrote:

I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

I strongly doubt it. Those and the twin V style are usually
considerably larger in OD, likely as large as the outer race.

Consider trying some Loctite. 680 and 640 might work. (I've never
tried this.)


Is there a standard name for these clips for bearing retaining applications?

Yeah, "bearing retainers". sorry, hadda do it

--
Always bear in mind that your own resolution to
succeed is more important than any one thing.
-- Abraham Lincoln



Thanks Larry, I think.

On 20-Mar-15 6:45 AM, Jim Wilkins wrote:
"Bogus" wrote in message
...
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to
not exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?

In my experience those clips are hard to keep straight unless you have
a guided tool to press them on evenly, like a small 1/4" drive socket.
They make a mess of the shaft if you have to move or replace them. I'd
try set screw collars first, with a snip of solder or string trimmer
line under the setscrew to protect the shaft. You could turn a
shoulder on the side to clear the shield.
http://www.amazon.com/Climax-Metal-L...C2W8Q9ZX4FGWNX
$0.64 each.

-jsw



Good idea but space constraints mean it cant be done.

On 20-Mar-15 7:34 AM, wrote:
On Thu, 19 Mar 2015 18:45:12 -0400, "Jim Wilkins"
wrote:

"Bogus" wrote in message
...
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to
not exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?

In my experience those clips are hard to keep straight unless you have
a guided tool to press them on evenly, like a small 1/4" drive socket.
They make a mess of the shaft if you have to move or replace them. I'd
try set screw collars first, with a snip of solder or string trimmer
line under the setscrew to protect the shaft. You could turn a
shoulder on the side to clear the shield.
http://www.amazon.com/Climax-Metal-L...C2W8Q9ZX4FGWNX
$0.64 each.

-jsw

The center race always stands slightly proud of the sheild, so using a
(hardned) washer against the bearing and driving the spring retainer
up against the washer would do the job - but as stated it's really
easy to damage the shaft. What's wrong with spacing the shaft using a
tube sleave over the shaft to locate the bearings - requiting only 1
"retainer" at each end of the shaft, which can be as simple as
threading the end of the shaft and using a nut? Fine adjustment of
position can be done with thin shim washers, and dissassembly is
simple and damage free any time in the future.
If a nut isn't fesible, drill the end of the shaft and tap it for a
hex-head cap screw.



A tube sleeve is what's being used currently. The volume is low so
everything is hand machined. I'm trying to eliminate as much machining
as possible.

The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.

On 19-Mar-15 9:22 PM, Bogus wrote:
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?


Cheers.



Here's a rough sketch of the arrangement:

https://dl.dropboxusercontent.com/u/...singSketch.pdf


Maybe the best idea is to try and source some of the push on retainers
and just try it. We've just done a batch that will last six months so
there is no time real urgency.

On Fri, 20 Mar 2015 13:49:47 +0800, Bogus wrote:

On 19-Mar-15 9:22 PM, Bogus wrote:
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?


Cheers.



Here's a rough sketch of the arrangement:

https://dl.dropboxusercontent.com/u/...singSketch.pdf


Maybe the best idea is to try and source some of the push on retainers
and just try it. We've just done a batch that will last six months so
there is no time real urgency.

Rotor Clip TY-25 or TX-25. McMaster carries the the TX in stainless.
http://www.mcmaster.com/#97622a111/=we330i

There are also retaining rings with an extra heavy cross section meant
to grip the shaft without a groove. I used to buy them form WM Berg.
Rotor Clip p/n SHF-25.

https://www.rotorclip.com/prod_self_...ning_rings.php

--
Ned Simmons

Can you just press it on?

On Fri, 20 Mar 2015 13:47:48 +0800, Bogus wrote:


The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.



http://www.centuryspring.com/products/discsprings.php
"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

On Fri, 20 Mar 2015 13:49:47 +0800, Bogus wrote:

On 19-Mar-15 9:22 PM, Bogus wrote:
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?


Cheers.



Here's a rough sketch of the arrangement:

https://dl.dropboxusercontent.com/u/...singSketch.pdf


Maybe the best idea is to try and source some of the push on retainers
and just try it. We've just done a batch that will last six months so
there is no time real urgency.
Tinnermanc15226ss-010 is .45" diameter and fits 1/4" shaft or stud
(.246 to .252" diameter) 10 thou thick. or change the last 3 digits to
014 for 14 thou thickness.
Also tinnerman c12046-012 .56 outside diameter with .44" flats


Better yet, try the tinnerman t99220ss-82-576 grooveless retainer ring
- only .312inch OD and .025 inch deep, made of .010 thick stainless
steel.. The latter would be my choice for the application shown in
the drawing.

On 21-Mar-15 3:55 AM, Gunner Asch wrote:
On Fri, 20 Mar 2015 13:47:48 +0800, Bogus wrote:


The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.



http://www.centuryspring.com/products/discsprings.php

Thanks - the finger springs or slotted disks might be useful. I think
the others are too heavy for my application.

On 20-Mar-15 10:29 PM, Bob Engelhardt wrote:
Can you just press it on?


Press the bearing onto the shaft?

No - shaft is 1/4" to suit compoenents that are fitted to either end.
Knurling the seating locations of the bearings may work but I'm trying
to eliminate as much machining as I can hence the push on retainers.

Thanks.

On 20-Mar-15 9:29 PM, Ned Simmons wrote:
On Fri, 20 Mar 2015 13:49:47 +0800, Bogus wrote:

On 19-Mar-15 9:22 PM, Bogus wrote:
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?


Cheers.



Here's a rough sketch of the arrangement:

https://dl.dropboxusercontent.com/u/...singSketch.pdf


Maybe the best idea is to try and source some of the push on retainers
and just try it. We've just done a batch that will last six months so
there is no time real urgency.

Rotor Clip TY-25 or TX-25. McMaster carries the the TX in stainless.
http://www.mcmaster.com/#97622a111/=we330i

There are also retaining rings with an extra heavy cross section meant
to grip the shaft without a groove. I used to buy them form WM Berg.
Rotor Clip p/n SHF-25.

https://www.rotorclip.com/prod_self_...ning_rings.php



Thanks Ned, both the TX & TY parts look worth trying out. I just need to
find a supplier down here in Australia. Thanks.

On 21-Mar-15 8:06 AM, wrote:
On Fri, 20 Mar 2015 13:49:47 +0800, Bogus wrote:

On 19-Mar-15 9:22 PM, Bogus wrote:
I'm trying to locate a small bearing on a shaft for an instrument.


I initially thought of machining a couple of slots on the shaft and
using E clips or wire clips.


What about using a push on fastener like this:

https://img1.fastenal.com/productimages/4115723.jpg


Bearing: R4ZZ (5/8" x 1/4" x 5mm)
Shaft: 1/4" stainless steel
Load: normally zero end load, perhaps a kilo or three when handled.
Speed: Static to a few RPM



Thoughts on practicality?

Are there clips made for this purpose that have a small OD so as to not
exceed the inner race diameter?

Is there a standard name for these clips for bearing retaining
applications?


Cheers.



Here's a rough sketch of the arrangement:

https://dl.dropboxusercontent.com/u/...singSketch.pdf


Maybe the best idea is to try and source some of the push on retainers
and just try it. We've just done a batch that will last six months so
there is no time real urgency.
Tinnermanc15226ss-010 is .45" diameter and fits 1/4" shaft or stud
(.246 to .252" diameter) 10 thou thick. or change the last 3 digits to
014 for 14 thou thickness.
Also tinnerman c12046-012 .56 outside diameter with .44" flats


Better yet, try the tinnerman t99220ss-82-576 grooveless retainer ring
- only .312inch OD and .025 inch deep, made of .010 thick stainless
steel.. The latter would be my choice for the application shown in
the drawing.



Thanks for the lead - I had not heard of Tinnerman, I'll check them out.

On 3/20/2015 1:16 AM, Larry Jaques wrote:
....
Consider trying some Loctite. 680 and 640 might work. (I've never
tried this.)
....

This is really the easiest, fastest, cheapest. "A little dab'll do ya'"
(you have to be older than 70 to get it).


http://www.loctite.com.au/3320_AUE_H...=8802648195073

On Sat, 21 Mar 2015 11:34:17 -0400, Bob Engelhardt
wrote:

On 3/20/2015 1:16 AM, Larry Jaques wrote:
...
Consider trying some Loctite. 680 and 640 might work. (I've never
tried this.)
...

This is really the easiest, fastest, cheapest. "A little dab'll do ya'"
(you have to be older than 70 to get it).


http://www.loctite.com.au/3320_AUE_H...=8802648195073
I've got about 7 years to go anf I remeber it - Might not at 70
though!!!!

On Sat, 21 Mar 2015 21:24:34 +0800, Bogus wrote:

On 21-Mar-15 3:55 AM, Gunner Asch wrote:
On Fri, 20 Mar 2015 13:47:48 +0800, Bogus wrote:


The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.



http://www.centuryspring.com/products/discsprings.php

Thanks - the finger springs or slotted disks might be useful. I think
the others are too heavy for my application.

Thats the reason they make "belleville " (sp) washers...just for
reasons like this.

You also need to check out "wave washers"

https://www.google.com/search?q=wave...utf-8&oe=utf-8


Gunner, who repairs/modifies/converts/updates machine tools for a
living


"At the core of liberalism is the spoiled child,
miserable, as all spoiled children are, unsatisfied,
demanding, ill-disciplined, despotic and useless.
Liberalism is a philosophy of sniveling brats."
PJ O'Rourke

On Sat, 21 Mar 2015 12:17:31 -0400, wrote:

On Sat, 21 Mar 2015 11:34:17 -0400, Bob Engelhardt
wrote:

On 3/20/2015 1:16 AM, Larry Jaques wrote:
...
Consider trying some Loctite. 680 and 640 might work. (I've never
tried this.)
...

This is really the easiest, fastest, cheapest. "A little dab'll do ya'"
(you have to be older than 70 to get it).

I'm only 61 and I got it. I modified that hair creme song, too.
"Girl cream, a couple jabs'll do ya."


http://www.loctite.com.au/3320_AUE_H...=8802648195073
I've got about 7 years to go anf I remeber it - Might not at 70
though!!!!

--
Always bear in mind that your own resolution to
succeed is more important than any one thing.
-- Abraham Lincoln

On 22-Mar-15 2:26 AM, Gunner Asch wrote:
On Sat, 21 Mar 2015 21:24:34 +0800, Bogus wrote:

On 21-Mar-15 3:55 AM, Gunner Asch wrote:
On Fri, 20 Mar 2015 13:47:48 +0800, Bogus wrote:


The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.



http://www.centuryspring.com/products/discsprings.php

Thanks - the finger springs or slotted disks might be useful. I think
the others are too heavy for my application.

Thats the reason they make "belleville " (sp) washers...just for
reasons like this.

You also need to check out "wave washers"

https://www.google.com/search?q=wave...utf-8&oe=utf-8



Thanks, I'll look more into Belleville washers, I had it in my head that
they were for heavier assemblies than the dinky little one I'm working with.

Wave washers - yep they might be useful.

Cheers

On 21-Mar-15 11:34 PM, Bob Engelhardt wrote:
On 3/20/2015 1:16 AM, Larry Jaques wrote:
...
Consider trying some Loctite. 680 and 640 might work. (I've never
tried this.)
...

This is really the easiest, fastest, cheapest. "A little dab'll do ya'"
(you have to be older than 70 to get it).


http://www.loctite.com.au/3320_AUE_H...=8802648195073





Hey, I've got two decades to got & I got it - may Australia really does
lag the world by 20 years...


The Loctite option is interesting, certainly simple. There may be
stronger grades available too. I'll have to do some measuring, the fit
at the moment is a sliding fit, no press or interference at all.

Thanks.

On 3/22/2015 8:24 AM, Bogus wrote:
...
The Loctite option is interesting, certainly simple. There may be
stronger grades available too. I'll have to do some measuring, the fit
at the moment is a sliding fit, no press or interference at all.

The Loctite 609, for example, is good for up to .005 sliding fit.
That's pretty loose. Strength is well above your needs.

On Sun, 22 Mar 2015 20:14:55 +0800, Bogus wrote:

On 22-Mar-15 2:26 AM, Gunner Asch wrote:
On Sat, 21 Mar 2015 21:24:34 +0800, Bogus wrote:

On 21-Mar-15 3:55 AM, Gunner Asch wrote:
On Fri, 20 Mar 2015 13:47:48 +0800, Bogus wrote:


The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.



http://www.centuryspring.com/products/discsprings.php

Thanks - the finger springs or slotted disks might be useful. I think
the others are too heavy for my application.

Thats the reason they make "belleville " (sp) washers...just for
reasons like this.

You also need to check out "wave washers"

https://www.google.com/search?q=wave...utf-8&oe=utf-8



Thanks, I'll look more into Belleville washers, I had it in my head that
they were for heavier assemblies than the dinky little one I'm working with.

Wave washers - yep they might be useful.

Cheers


Your head had it right. Bellevilles are generally only practical as
preload springs on bearings larger than yours. Wave or finger springs
are the way to go, if you need preload, in the 1/4" size range.

But if, as you're sketch indicates, you can tolerate 0.4mm end play,
you probably don't need the preload. All radial ball bearings have
some play, but my SWAG is a normal 1/4" bearing will have less than
0.4mm axial play. The bearing mfrs publish this info -- look for
numbers for "internal clearance."

--
Ned Simmons

On 23-Mar-15 12:37 AM, Ned Simmons wrote:
On Sun, 22 Mar 2015 20:14:55 +0800, Bogus wrote:

On 22-Mar-15 2:26 AM, Gunner Asch wrote:
On Sat, 21 Mar 2015 21:24:34 +0800, Bogus wrote:

On 21-Mar-15 3:55 AM, Gunner Asch wrote:
On Fri, 20 Mar 2015 13:47:48 +0800, Bogus wrote:


The spacer washers is an idea. I had also thought of using some SS or
BeCu wave washers to slightly preload and take out any end play.



http://www.centuryspring.com/products/discsprings.php

Thanks - the finger springs or slotted disks might be useful. I think
the others are too heavy for my application.

Thats the reason they make "belleville " (sp) washers...just for
reasons like this.

You also need to check out "wave washers"

https://www.google.com/search?q=wave...utf-8&oe=utf-8



Thanks, I'll look more into Belleville washers, I had it in my head that
they were for heavier assemblies than the dinky little one I'm working with.

Wave washers - yep they might be useful.

Cheers


Your head had it right. Bellevilles are generally only practical as
preload springs on bearings larger than yours. Wave or finger springs
are the way to go, if you need preload, in the 1/4" size range.

But if, as you're sketch indicates, you can tolerate 0.4mm end play,
you probably don't need the preload. All radial ball bearings have
some play, but my SWAG is a normal 1/4" bearing will have less than
0.4mm axial play. The bearing mfrs publish this info -- look for
numbers for "internal clearance."



Thanks Ned.

On 22-Mar-15 11:10 PM, Bob Engelhardt wrote:
On 3/22/2015 8:24 AM, Bogus wrote:
...
The Loctite option is interesting, certainly simple. There may be
stronger grades available too. I'll have to do some measuring, the fit
at the moment is a sliding fit, no press or interference at all.

The Loctite 609, for example, is good for up to .005 sliding fit. That's
pretty loose. Strength is well above your needs.



Thanks Bob, it's not an expensive exercise just to grab some and test it
out either. 0.005" is quite a bit.

On Mon, 23 Mar 2015 14:16:40 +0800, Bogus wrote:

On 22-Mar-15 11:10 PM, Bob Engelhardt wrote:
On 3/22/2015 8:24 AM, Bogus wrote:
...
The Loctite option is interesting, certainly simple. There may be
stronger grades available too. I'll have to do some measuring, the fit
at the moment is a sliding fit, no press or interference at all.

The Loctite 609, for example, is good for up to .005 sliding fit. That's
pretty loose. Strength is well above your needs.



Thanks Bob, it's not an expensive exercise just to grab some and test it
out either. 0.005" is quite a bit.

Got a hammer, punch, and anvil? g It won't take much to close up
the gap by putting a small flat on the shaft.

--
The Road to Success...is always under construction.
--anon

On 23-Mar-15 10:39 PM, Larry Jaques wrote:
On Mon, 23 Mar 2015 14:16:40 +0800, Bogus wrote:

On 22-Mar-15 11:10 PM, Bob Engelhardt wrote:
On 3/22/2015 8:24 AM, Bogus wrote:
...
The Loctite option is interesting, certainly simple. There may be
stronger grades available too. I'll have to do some measuring, the fit
at the moment is a sliding fit, no press or interference at all.

The Loctite 609, for example, is good for up to .005 sliding fit. That's
pretty loose. Strength is well above your needs.



Thanks Bob, it's not an expensive exercise just to grab some and test it
out either. 0.005" is quite a bit.

Got a hammer, punch, and anvil? g It won't take much to close up
the gap by putting a small flat on the shaft.

--

Shhhh! I've done that too.