Question about Ammco Combination Disc/Drum Brake Lathe

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MY AMMCO BRAKE LATHE IS CUTTING EVEN,BUT LEAVING SMALL GROOVES

IT WAS WORKING FINE UNTIL YESTERDAY.I CHECKED EVERYTHING I KNOW INCLUDING NEW BLADES'
PLEASE HELP

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The problem isn't clearly explained. but the main shaft bearings go bad after awhile and it's one day thier good the next job their bad.

Posted on May 13, 2010

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As for the post above--the "main shaft" or spindle bearings (actually large bushings) rarely go bad on an Ammco machine.

You most likely have feed problems with the cross-feed assembly. Either it is stick and lacking lubrication. Or the threads on the cross-feed screw are bad. Or you may have a bad cross-feed nut.

You may have loose cutting bits--or worn out cutting bits. FYI--never use the stock Ammco bits (junk). Or you may have a cracked tool guide.

Tehre are several possibilities for this problem.

Posted on Mar 14, 2014

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Ammco 4000 longtravel g/box adjustment not working properly,variable speed adjustment works slowly,then when increased starts to work backwards


What you are referring to is called an "Infimatic" gearbox, or drum-feed gearbox.

The problem lays inside most likely with the clutches.
They are worn out, and possibly other components are worn and broken. Feeding backwards means something has gone terribly wrong--and it needs to be fixed immediately for the machine to operate properly.

These gearboxes are not easy to fix properly--they are literally like a puzzle inside. Our shop employs a infimatic gearbox specialist and we are one of the few shops who can rebuild them to factory spec.

A brand new Infimatic gearbox will run you over $1,300.00 plus tax and shipping from an Ammco depot.

You can ship a broken Infimatic gearbox to our shop for a complete rebuild to factory spec.

For more information...

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Mar 04, 2014 | Ammco Tools & Hardware - Others

1 Answer

AMCCO 4000 BRAKE LATHE CHATTERS WHILE TURNING ROTORS


Not enough rigidity, wrong speed, wrong feed rate, wrong depth of cut, wrong or dull tooling...

Feb 03, 2012 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

Ammco


Most likely you have a stripped out "disc feed screw."
This is a common problem I see several times a month in the field.
The stripped out portion of the screw is near the end of the feed range obviously.

If you need parts or more questions answered....

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Jan 22, 2012 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

Instructions for changing an ammco 3000 brake lathe to a 4000. Parts needed?


Yes, an Ammco 3000 brake lathe can be converted over to a 4000 model--most any year 3000.... preferably the later years after 1970.

The problem with some of the early 60's models is that the cross-feed bore is not perfectly perpendicular to the spindle.

If you convert one of these models, you will cut the rotor at an angle and then jam the machine.

Later models can easily be converted.

You will need...

1) A complete disc feed gearbox.
2) A driven pulley (the big one) set-up for a with a pin drive.
3) A complete spindle lock assembly for the Infimatic gearbox.
4) Possibly need a longer guide bar for the cross-freed. If you have a round guide bar, this is possibly long enough. If you have a "Double-D" guide bar (flat on each side), you most likely will need a longer bar.
5) A complete twin-cutter, with tool guides, tool holders, knobs, etc.

We have all the parts you need for a conversion--or we can convert it expertly for you...

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Aug 03, 2011 | Ammco Combination Disc/Drum Brake Lathe

3 Answers

Brake lathe chattering bad


There's a lot of reasons why a brake lathe chatters during a cutting operation. They range from lack of maintenance, adjustments, cutting speeds, wrong cutting tools and so on and so forth.

Be a little more specific.

What kind of machine are you using?
What are you cutting? (rotors? drums?)
Are you using the proper silencers?

Come back with some answers please.

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Dec 16, 2010 | Ammco Combination Disc/Drum Brake Lathe

1 Answer

How do I change the belt on my ammco 4000 lathe?


I am a brake lathe technician.

To change the drive belt on an Ammco 4000, you must first remove the 90 degree angle PTO (power take off) gear assembly which is driven off the back of the big pulley. Two small allen head screws hold it tight.

Pull the PTO gear assembly out of the disc-feed gearbox. If there are colored shims between the gearbox and the PTO assembly, you must make sure not to loose. If they drop off, be sure to replace them with a dab of grease.

Rotate the red knob at the back of the machine and the motor assembly will unlock and rotate upwards. Replace the drive belt.

To adjust the drive belt tension properly--loosen the 3/4 inch nut on the back of the machine, and the motor will drop down. Tighten the 3/4 inch nut and then rotate the red knob back until the belt is taught.

Replace the PTO gear assembly--making the rotating part with the protruding pin is centered on the big pulley. Tighten the allen head cap screws.

Turn on the machine. If the PTO is making noise--you have not correctly is correctly. Repeat the centering process until the machine runs without rattling or vibration.

Sep 28, 2010 | Ammco Combination Disc/Drum Brake Lathe

2 Answers

I got an ammco 3000 i just have 1 bit on it and i dont have any item number on boring bar,bit holder i just have the bit size that is a little bit small than 7/16 that is 55/128 from base(bottom)to the...


If you live near a machine shop any lathe operator can steer you in the right direction, or you could call them. I'm not certain if Ammco is still in business. I had the same machine in my shop in 1976, not the same model # of course, but a model with the stand.

Aug 22, 2009 | Ammco Combination Disc/Drum Brake Lathe

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