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Thread: Ejector pin grinding/cut off machine?

  1. #13
    Registered Chuck Reamer's Avatar
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    Quote Originally Posted by jetski View Post
    Yes what we call a snag grinder is a bench or pedistal grinder. The Great White North? You guys are the best in Canada. I did a trade show in Edmonton several years back. Nicest place with the friendliest people on the earth. Glad to see the Loonie and the Toonie doing well. Back to the grinder think we have used the v-block and a stop, cut off wheel on a surface grinder. Hey the trick on the snag grinder is to learn on larger dia. pins at first and then slowly work your way down to the .062 dia. ones. I get those with in .003 and stone them if they are critical. You would also be amazed at what you can do with a dremel tool. Have fun.

    Edmonton is where I am at as a matter of fact.

    I use my small pencil air grinder all the time, works like the cats pyjamas.

    Live free or die


  2. #14
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    Well, for all of us guys who don't have the knack of snag grinding to within +/- 0.001", I guess we could make an adjustable fixture and attach that to our pedastal grinder.

    It would just need to be a V-block mounted perpendicular to the side of the wheel, and have an adjustable stop for the pin head to set against. The stop could be adjustable with a threaded rod.

    Project time again!

    Jim



  3. #15
    Registered BobWarfield's Avatar
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    Quote Originally Posted by Jim Estes View Post
    Well, for all of us guys who don't have the knack of snag grinding to within +/- 0.001", I guess we could make an adjustable fixture and attach that to our pedastal grinder.

    It would just need to be a V-block mounted perpendicular to the side of the wheel, and have an adjustable stop for the pin head to set against. The stop could be adjustable with a threaded rod.

    Project time again!

    Jim
    There ya go!

    I bet that fixture will find other uses over time too.

    One more thought, much as I like my Tool & Cutter grinder, I like my disc grinder better. I'd be tempted to make a fixture for a disc grinder. Mine definitely cuts flat very easily.

    Cheers,

    BW



  4. #16
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    Before I got my surface grinder I used my disk sander with a 60 grit blue pad on it. I would clamp a v-block perpendicular to the sanding surface - about .060-.100" away.

    JP



  5. #17
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    Snag grinder eh? We used a big ol 10hp disc sander with a pin fixture set up at 90 degrees and double checked with a height gauge on a stand next to it. Cavemanish yes - but very quick and effective when you're in small shop. Do enough of them and you learn to be very efficient at it.
    There are commercial ejector pin vises that can be purchased by component suppliers now that are quite good.



  6. #18
    Registered CMB's Avatar
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    Talking

    Quote Originally Posted by Jim Estes View Post
    I ha ve a fixture that I made years ago, basically a v-block that I can lay down on the chuck or stand up on end. I always cut all my pins off at once, then stand the fixture up and grind the ends to lengh. The cut-off/gind machines that DME sells, only do side grinding, which leaves a rougher finish on the end of the pins, which I never liked. However, for really long pins, 10-14 inches, I have to side grind those anyway.

    I worked at a shop once and we made some fixtures to grind pins, they had holes reamed in tso plates to fit the pins, these plates were mounted on a third base plate and one of them could be moved to set the length. I hated those things with a passion, once you got grinding dust in those holes, it was useless.

    Jim
    I have a v block fixture that lays down horizontally with an adjustable stop. Made another fixture that has a v block on a slider and base with multiple "vee's" for various pin diameters.



  7. #19

    Pin cutting

    We have two chop saws that we modified with digital mics as stops. Purchased a handful of standards that go from 1" up to 6" to help offset the stop. You might sacrifice the first pin as a "tageting shot" but once you get it dialed in you can cut like crazy and hold some good tolerance. We have a small chop saw for the small pins and a large one for the large pins.

    If the pins are under the part then generally the chop saws get close enough. If it is on the appeance side of the part then we cut overside and use the gang V block set-up, 8 pins at once.

    Steve

    Attached Thumbnails Attached Thumbnails -p1010011-jpg   -p1010012-jpg   -p1010013-jpg  


  8. #20

    we can supply the ejector pin cutting machine

    Quote Originally Posted by Chuck Reamer View Post
    Have any of you made a ejector pin grinder?

    I am in need of a pin cutter mostly just for cutting pins to length, they are expensive to purchase. There are a few ideas running around my head, but I am wondering what is a good proven way of doing this.

    If you have made something that works good, or know of a decent affordable unit and could throw an idea my way it would be great.
    Dear sir, we are manufacture for ejector pin cutting machine in China, we can supply you at our best price with high quality, if you have interest, you can have visit for our website.

    Top manufacture for grinder and air tapping machine
    www.thorgrinder.com


  9. #21
    We have a good machine which can cutting off pin and also can grind.

    please check:Ejector pin cutting off machine,Pin cutting off machine,High speed cutting off machine-Dongguan Thor Machinery Co.,Ltd-Air tapping machine,Electric tapping machine,Drill grinder,End mill grinder,Cutter grinder,Tool grinder,Chamfering machine,cutting

    Precision cut-off and grinding machine VEC-300G/500G/600G

    Features:
    1 Suitable for cutting mold die, tape pin and stainless steel use to meet precise cutting face of the work piece.
    2 To cut and mill in the same time ,save the operation cycle time.
    3 Quick clamp design, easy to use and fast.
    4 Easy to set the position by microsetter.
    5 Wheel can be adjustable during the operation without changing its dimension.
    6 Good stability, lower wearing rate, longer use life.

    Technical data:
    Cutting tolerance:3-25MM
    Cutting off precision:25MM 300MM within 0.01
    cutting wheel:1*180*32MM
    Grinding wheel:100*50*20MM
    Speed:3600RPM
    Motor:3/4HP 220V/380V
    Measure gauge:300MM/500MM/600MM
    Weight: 88KG/91KG/93KG
    Machine size:430*360*500MM



  10. #22
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    How much does that cost in US dollars?


    Sent from my iPad using Tapatalk



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