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  1. #1
    Kelly Anderson is offline Aluminum
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    Dec 2004
    Location
    Strasburg. PA
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    144

    Post

    We have a 1994 standard Bridgeport, minus an owner's manual. Anyone know how much weight the table is rated to carry?

  2. #2
    Dave A is offline Titanium
    Join Date
    Jan 2005
    Location
    Roseville, CA
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    3,858

    Post

    I don't have a manual, but most of these mills, including the imported clones, have a table capacity of 750 lbs. That has always seemed like a lot of weight to me.

  3. #3
    Kelly Anderson is offline Aluminum
    Join Date
    Dec 2004
    Location
    Strasburg. PA
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    144

    Post

    Thanks. We have a 500 lb part to load. Looks good to go.

  4. #4
    chief mcgee is offline Aluminum
    Join Date
    Apr 2005
    Location
    south Alabama
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    116

    Post

    Bridgeport manual says 750 lbs.

  5. #5
    Carl Darnell is offline Titanium
    Join Date
    Jun 2006
    Location
    Taylorsville Ky
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    3,122

    Post

    Unless you have a lot of hang over you have no problem. I have put a lot of weight on them. The knee screw and nut are what carries the load mostly. Be sure to lube the threads well. I tried to find the specs in my book but found none.

    edit: Bridgeport web site spec says 750lb max. A 12"wx18"lx12"h block of steel will weight about 733lb so I don't think I have had over 500lb on any I have used.

  6. #6
    Forrest Addy is offline Diamond
    Join Date
    Dec 2000
    Location
    Bremerton WA USA
    Posts
    9,305

    Post

    That's 750 lb centered on the saddle. Less as you offset the table. I would limit table loads to 100 lb on the end with the table offset to the extreme.

    Turret mills are weak in the saddle department. The saddle is short and narrow meaning the long table demanded by customers these days can be cantilevered out to alarming distances. The concentrated loads on the ends of the saddle wears hollows in the table and humps the saddle.

    That's the beauty of the turret mill design with its two axis head tilt. You can get to every detail of any part you can fit on the table by swiveling the turret and extending the ram. So why is it I see turret mills with the ram straight ahead and the table offset to the max with a heavy awkward part on it?

    The turret/ram design adds 20% to the cost of the mill. Why not use it?

  7. #7
    Cyclotronguy is offline Hot Rolled
    Join Date
    Sep 2005
    Location
    Northern California
    Posts
    775

    Post

    Back when I used to regrind tables and saddles for B'ports, we did some experiments and concluded that 250 lbs was pretty much their accurate limit if you want any degree of table travel.

    Cyclotronguy

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