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Anti-backlash nuts for Bridgeport?

Discussion in 'BRIDGEPORT MACHINES INC. & B'PORT CLONES' started by expressline99, Feb 24, 2017.

  1. expressline99

    expressline99 H-M Supporter - Premium Content H-M Supporter-Premium

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    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
     
  2. Sendit

    Sendit United States Active Member Active Member

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    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.
     
  3. expressline99

    expressline99 H-M Supporter - Premium Content H-M Supporter-Premium

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    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.
     
  4. Dabbler

    Dabbler H-M Supporter - Premium Content H-M Supporter-Premium

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    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.
     
  5. expressline99

    expressline99 H-M Supporter - Premium Content H-M Supporter-Premium

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    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.
     
  6. Dabbler

    Dabbler H-M Supporter - Premium Content H-M Supporter-Premium

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  7. Rick_B

    Rick_B United States Active User H-M Supporter-Premium

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    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
     
  8. ewkearns

    ewkearns United States Active Member Active Member

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    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.
     
    expressline99 likes this.

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