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4

Anti-backlash nuts for Bridgeport?

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expressline99

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#1
Do they make anti-backlash nuts for Bridgeports? The spring loaded type...? If not why?
I'm familiar with the splitting the nuts and using felt for more adjustment.
Could be a simple answer but I gotta know.

On my machine there was 70 thou lash on the x axis and adjusting it only got it down to 30. (non-split nuts) I'm guessing by splitting them I might get it down more but then the outer edges of travel will be unusable. Probably end up replacing the screws and nuts on this. But does an anti-backlash nut exist for it?

Paul
 

Sendit

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#2
Felt is not used for adjustment and is actually a bad idea to put in between the nuts.

I haven't seen any spring type. It's not hard to or takes alot of time to adjust the backlash. Get a DRO and forget about backlash.
 

expressline99

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#3
Felt is not used for adjustment and is actually a bad idea to put in between the nuts.

I haven't seen any spring type. It's not hard to or takes alot of time to adjust the backlash. Get a DRO and forget about backlash.
DRO might be the only way to go. Bummer is I still have to take the table off and all to do a complete cleaning.

I'm rebuilding the head from bottom up now. Just started putting that all back together.
 

Dabbler

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#4
Express, does your lead screw nut come in two pieces with a set screw in between? Mine has this and it is to adjust the backlash to between 10 and 15 thou... A DRO is still the way to go, and they are soooo cheap nowadays.
 

expressline99

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#5
Express, does your lead screw nut come in two pieces with a set screw in between? Mine has this and it is to adjust the backlash to between 10 and 15 thou... A DRO is still the way to go, and they are soooo cheap nowadays.
Mine are single piece setups. I am going to do the DRO. Now the question will be 2 or 3 axis. But the price goes up a lot with the 3rd.
 

Rick_B

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#7
Paul - DRO is the way I'm going to go - likely on of the chinese offerings. I, too, am debating 2 or 3 axis

Rick
 

ewkearns

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#8
I don't think they exist, but they should. DRO aside..... uncontrolled backlash prevents using the benefits of climb milling on any work hardening materials.
 
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