Re: [CAD_CAM_EDM_DRO Timesaver Lapping Compound
Posted by
Dan Mauch
on 2000-10-12 09:05:40 UTC
I used Timesaver lapping compound all the time. It's key feature is that it
will embed in the metal. It laps to it clearance and stops. I have two cans
of it. One is Timesaver Yellow that can be used to lap babbitt, aluminum or
brass and will not embed it the metal. Then there is Timesaver Green which I
used for lapping my mill drill table. I have had these cans for 30 years. It
is a dry powder that you mix machine oil.
The first job that I used it on was a gear box for a radar antenna. The bull
gear was badly worn. So we had a new one made. When we assembled it with a
new gear that we had made it was tight and noisy. We dapped a bit of
timesaver yellow on the bronze gears and connected a ammeter to the motor.
When we ran the motor the current was a bit high. After 5 minutes of running
the noise was gone. the backlash was within specs and the motor current
dropped to normal. We disassembled the gear box and cleaned all the parts
and renewed the bearings and seals. We reassembled it and it ran fine. four
years later when the ship came in for it regular overhaul we inspected the
gearbox and found it to be in good shape.
The last know location of Timesaver Products was 629 W. Washington Ave
Chicago, Illinois
I just did a search and found this URL
http://www.newmantools.com/lapping/time.htm for the product
Dan
-----Original Message-----
From: Jon Anderson <janders@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Thursday, October 12, 2000 7:44 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re:Casting clearance
will embed in the metal. It laps to it clearance and stops. I have two cans
of it. One is Timesaver Yellow that can be used to lap babbitt, aluminum or
brass and will not embed it the metal. Then there is Timesaver Green which I
used for lapping my mill drill table. I have had these cans for 30 years. It
is a dry powder that you mix machine oil.
The first job that I used it on was a gear box for a radar antenna. The bull
gear was badly worn. So we had a new one made. When we assembled it with a
new gear that we had made it was tight and noisy. We dapped a bit of
timesaver yellow on the bronze gears and connected a ammeter to the motor.
When we ran the motor the current was a bit high. After 5 minutes of running
the noise was gone. the backlash was within specs and the motor current
dropped to normal. We disassembled the gear box and cleaned all the parts
and renewed the bearings and seals. We reassembled it and it ran fine. four
years later when the ship came in for it regular overhaul we inspected the
gearbox and found it to be in good shape.
The last know location of Timesaver Products was 629 W. Washington Ave
Chicago, Illinois
I just did a search and found this URL
http://www.newmantools.com/lapping/time.htm for the product
Dan
-----Original Message-----
From: Jon Anderson <janders@...>
To: CAD_CAM_EDM_DRO@egroups.com <CAD_CAM_EDM_DRO@egroups.com>
Date: Thursday, October 12, 2000 7:44 AM
Subject: Re: [CAD_CAM_EDM_DRO] Re:Casting clearance
>Ron Ginger wrote:discussion of shop built systems, for CAD, CAM, EDM, and DRO.
>
>> I did the Sherline nuts and they worked OK, the larger ones for
>> the Grizzley failed.
>
>I did some 1/4-16 acme nuts for my Max, and a 1"-10 acme for a surface
>grinder I was restoring. The smaller nuts were tight, but could be
>removed and I was able to lap them without great difficulty.
>The larger nut, I thought for sure I'd have to scrap the nut by
>machining it off. Luckily I had an extra inch of screw, and used a pipe
>wrench to get it backed out. Turned off the now munged threads, and
>cut a tap-like relief in the end of the screw. I gently upset the edges
>of one full thread form to increase the profile, and ran this through
>the nut a couple times to scrap out some clearance for the oil and
>Timesavers lapping compound I used to finish fit the nut.
>
>I'd applied what I thought was way too much release agent on the large
>screw, and it still wasn't enough. If you have any sense of caution at
>all, I sort of doubt you will have to worry about applying too much.
>Be generous.
>
>Jon
>
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