I found that forcing a ball bearing thru a channel using an arbor
press works really well for a certain project I am working on, to
resize a passage.

It was something I thought of as an economical alternative to building
a ball broach.

The size is 1.375, and I would like to open this passage up a few more
thou, so I was trying to come up with a way to do this.

I had thought that I might try getting a few of these balls HARD
CHROMED. My thought here would be the diameter would increase, and
the hard chroming would be durable (?) enough for multiple uses. I
know it will not be an exact process, so if I took 10 ball bearings in
and had them all done, I might have have one or two that are sized
just right.

I am not looking to debate the different ways to resize a hole, as for
this particular project, broaching it works very well. Just need some
real world, productive and positive suggestions as to whether hard
chroming, or some sort of electroplating option would be a viable
direction.

Thanks to all who help!

wrote:
I found that forcing a ball bearing thru a channel using an arbor
press works really well for a certain project I am working on, to
resize a passage.

It was something I thought of as an economical alternative to building
a ball broach.

The size is 1.375, and I would like to open this passage up a few more
thou, so I was trying to come up with a way to do this.

I had thought that I might try getting a few of these balls HARD
CHROMED. My thought here would be the diameter would increase, and
the hard chroming would be durable (?) enough for multiple uses. I
know it will not be an exact process, so if I took 10 ball bearings in
and had them all done, I might have have one or two that are sized
just right.

I am not looking to debate the different ways to resize a hole, as for
this particular project, broaching it works very well. Just need some
real world, productive and positive suggestions as to whether hard
chroming, or some sort of electroplating option would be a viable
direction.

Thanks to all who help!

Maybe worth enquiring if one is already available for the purpose in the
size you require http://www.precisionballs.com/ballsizing.htm

Hard chrome does work on brass and bronze, but might not work well on other
materials. Depending on the run length, perhaps just lanolin alone would be
enough.
Steve

wrote in message
...
I found that forcing a ball bearing thru a channel using an arbor
press works really well for a certain project I am working on, to
resize a passage.

It was something I thought of as an economical alternative to building
a ball broach.

The size is 1.375, and I would like to open this passage up a few more
thou, so I was trying to come up with a way to do this.

I had thought that I might try getting a few of these balls HARD
CHROMED. My thought here would be the diameter would increase, and
the hard chroming would be durable (?) enough for multiple uses. I
know it will not be an exact process, so if I took 10 ball bearings in
and had them all done, I might have have one or two that are sized
just right.

I am not looking to debate the different ways to resize a hole, as for
this particular project, broaching it works very well. Just need some
real world, productive and positive suggestions as to whether hard
chroming, or some sort of electroplating option would be a viable
direction.

Thanks to all who help!

wrote:

I found that forcing a ball bearing thru a channel using an arbor
press works really well for a certain project I am working on, to
resize a passage.

It was something I thought of as an economical alternative to building
a ball broach.

The size is 1.375, and I would like to open this passage up a few more
thou, so I was trying to come up with a way to do this.

I had thought that I might try getting a few of these balls HARD
CHROMED. My thought here would be the diameter would increase, and
the hard chroming would be durable (?) enough for multiple uses. I
know it will not be an exact process, so if I took 10 ball bearings in
and had them all done, I might have have one or two that are sized
just right.

I am not looking to debate the different ways to resize a hole, as for
this particular project, broaching it works very well. Just need some
real world, productive and positive suggestions as to whether hard
chroming, or some sort of electroplating option would be a viable
direction.

Thanks to all who help!

Buy a couple ballizing balls in the size you need.

Check McMaster or MSC.

IIRC, they can be got in fairly small increments. Contacting the
makers and asking to speak with an applications specialist would be
good. Probably tell you excactly what your best size choice is.

I figure that the electroplating option is sorta random in the results
you could end up with.

Cheers
Trevor Jones

On Mar 2, 7:30*am, wrote:
I found that forcing a ball bearing thru a channel using an arbor
press works really well...

The size is 1.375, and I would like to open this passage up a few more
thou

If the workpiece is aluminum, and you only need .002" or so, you could
experiment with chilling the work. At dry-ice temperatures the
elastic rebound may be less, and the passage will certainly be larger
when it warms back to room temperature.

35 mm = 1.3779 in. If you can find them, thats the right direction.

Hul

wrote:
I found that forcing a ball bearing thru a channel using an arbor
press works really well for a certain project I am working on, to
resize a passage.

It was something I thought of as an economical alternative to building
a ball broach.

The size is 1.375, and I would like to open this passage up a few more
thou, so I was trying to come up with a way to do this.

I had thought that I might try getting a few of these balls HARD
CHROMED. My thought here would be the diameter would increase, and
the hard chroming would be durable (?) enough for multiple uses. I
know it will not be an exact process, so if I took 10 ball bearings in
and had them all done, I might have have one or two that are sized
just right.

I am not looking to debate the different ways to resize a hole, as for
this particular project, broaching it works very well. Just need some
real world, productive and positive suggestions as to whether hard
chroming, or some sort of electroplating option would be a viable
direction.

Thanks to all who help!