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Thread: Saddle Drilling Attachments

  1. #1
    Join Date
    Dec 2002
    Location
    Friesland, Netherlands
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    Default Saddle Drilling Attachments

    Anyone used / have one of these? The benefits are obvious; drilling holes using the saddle's power feeds. How much hassle are they to mount & dismount - are they accessories that end up gathering dust as the work to mount them is more than the effort required to turn the tailstock's handle?

    I've seen one for sale that'll fit my Harrison M400, and it is almost Christmas...

    Ian

  2. #2
    Join Date
    Apr 2001
    Location
    Clinton, WA
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    955

    Default

    I do most of my drilling from the saddle, but my lathe is CNC. Here is a picture of one of my set-ups,


    I also use one of these when I have an Aloris post on the lathe,


    Set-up is fairly easy, just put a dowel in the chuck and use a dial indicator to center it. If you have a DRO you can log in the position or if you don't you can zero the dial on the crossfeed.
    Mark Hockett

  3. #3
    Join Date
    Jul 2005
    Location
    Bloomington, IN
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    4,690

    Thumbs up

    I learn something new everyday! I've never seen those before but thats pretty neat!

  4. #4
    Join Date
    Jun 2002
    Location
    Ashland City, TN
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    2,295

    Default

    I've seen some pictures in old engineering books showing drilling being done on the carriage, especially drilling deep holes, such as a gun barrel. If the price is reasonable, go ahead and buy it and if you cannot find a use for it, there is always Ebay.

  5. #5
    Join Date
    Dec 2003
    Location
    Palo Alto, California
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    1,312

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    I like the toolpost mounted chuck for drilling, especially deep holes. Rather than getting carpal tunnel syndrome spinning the tailstock crank, I can do my pecking sequence really easily with the saddle traverse.
    Cheers,

    Frank Ford
    HomeShopTech

  6. #6
    Join Date
    Jan 2003
    Location
    Deep in the Heart of Texas!
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    Yep, I could have used one of those yesterday. My tailstock ram will only travel about 2 1/2". I had to drill through 3" of stock so had to stop, move the tailstock and drill. Had to stop a couple of times to move the tailstock back out to clear chips. PITA. Even so, that's a mighty expensive accessory if not used frequently.

    I like the idea of a chuck on a tool holder. I may ponder some on that.

  7. #7

    Default

    I have used something like that. The thing you have to watch out for is the possibility of the tool post turning under a heavy feed. This has happened to me and I've been thinking about mounting some kind of backstop on the carriage to prevent this.
    TS

  8. #8
    Join Date
    May 2006
    Location
    Phoenix, AZ
    Posts
    3,214

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    If you've got a "T" slot compound (or cross?) you could just remove the tool post (all of 5 seconds tops?) and install a chuck holder based on an old style boring bar plinth. This could be easily built and bored in place to guarantee CL height. Then use a chuck mounted on appropriate straight shank and you’re ready to go. When bolted down, there would be no rotational force to deal with, and very little more overhead than a quick change holder.

  9. #9
    Join Date
    Dec 2002
    Location
    Friesland, Netherlands
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    Mark,

    That's a pretty neat solution! On the problem of the toolpost rotating due to the excentric load, mine has a steel pin that engages with the topslide, locking it square to the topslide - I was wondering what this was for! With the topslide set parallel to the bed, the toolpost should be square too.

    Instead of a drill chuck, a morse taper socket might be more useful to me, same taper as in the tailstock.

    Ian

  10. #10
    Join Date
    Nov 2001
    Posts
    801

    Default

    Feeding large drills builds up lots of pressure.

    I've seen at least one Lodge and Shiply lathe with a repair
    plate bolted under the compound after they broke it off.

    You need to frequently moniter the pressure level by
    releasing the feed, and clearing chips.

    Kap

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