What's new
What's new
By:
Advanced search…

Search results

  1. G

    good compact storage system for grinding mandrels?

    Hi, Tim here. what about a piece of Styrofoam that could fit in the drawer of your tool box, or what ever is handy. Simply push the mandrel down into the material--if you want, drill holes the size of the mandrels. Store them with stones up so that you can readily see size and shape, grade of...
  2. G

    good compact storage system for grinding mandrels?

    Hi, Tim here. what about a piece of Styrofoam that could fit in the drawer of your tool box, or what ever is handy. Simply push the mandrel down into the material--if you want, drill holes the size of the mandrels. Store them with stones up so that you can readily see size and shape, grade of...
  3. G

    keyway braoch sharpening

    Hi Keith, This is how I approach it. On a tool & cutter grinder, I secure machinist vice up at 90 deg. with the base of the vise at 1-1/2 deg off of 90 to the spindle. This is for the cutting clearance of each tooth(1 to 3 deg is recommended ) place parallel skinnier than the broach behind...
  4. G

    Tube End Notching? Should be easy but isn't.

    Hi,Tim here. Might you try a spiral roughing end mill??? using the correct diameter to obtain whatever radius is needed, plunge in the depth desired. They can be resharpened(changes diameter) but if doing many parts, regrinds can be used to move the majority of metal--save the last nibbles for a...
  5. G

    Please help me identify this grinding fixture?

    Hi, I wonder if it is a type of geared head to run the flutes of end mills(poss. spiral roughers) many end mills have the "lead" on the shank. You could plug that number into the work head and it could spin the cutter in the proper rotational plane to the grinding wheel. I cheat. My mentor...
  6. G

    Black Diamond drill grinder

    black diamond drill grinder Hi, Tim here. I have 2 black diamonds. There is a lot missing. It needs the drill stand, that sets above the protractor to the right of the grinding wheel. Can't tell if there are any of the "master collets" in the box with the drill holder. No idea how many drill...
  7. G

    Help With Black Diamond Drill Bit Grinder

    Hi, Tim here. I have 2 Black Diamond drill grinders. I grind hundreds of drills on them every month. If you would like to PM me and talk with me, I could help you set up your machine so you can run trouble free. Have a great day.
  8. G

    How can collet grip be improved?

    Hi Tim here, I re-grind end mills all day. an easy way I have found to greatly enhance collet grip is to take a single wrap of paper .004" thick once around the shank. I have a small plastic divided box with a cardboard master and many paper wraps pre-cut for each size shank that I encounter...
  9. G

    Hi Matt, Tim here. Don't know if you remember me??? Burke's Precision Grinding. I still service...

    Hi Matt, Tim here. Don't know if you remember me??? Burke's Precision Grinding. I still service Galesburg. you can give me a call sometime if you need any cutter sharpened. Have a great day. (309) 313-4713
  10. G

    O/T _ Crude Oil Trains

    Hi Tim Here, You can connect the dots-follow the money. About 3 yrs ago a customer of mine(Griffin Wheel, Keokuk Iowa) Div. of Amsted Rail. Re-opened a plant that had been in mothballs for over13 years in Alabama.I said somebody knows something, you just don't start making railroad wheels on a...
  11. G

    how thin can you dress a grinding wheel down to?

    Hi Tim here. A wheel of choice for me would be a 7 in dia. 1/4" thick 60k. It is aggressive enough to cut freely the k, will allow you hold form on the radius but not so hard as to fill up or burn too easily. I plunge away at least half or more of thickness with a single point diamond down an...
  12. G

    Quincy Compressor Paint Color

    Hi, Tim here. I live an hr. from the factory(Quincy, Illinois). My mentor purchased his (now mine) new in Dec. 1964. It has had a gentle life as we only run it 6-7 days a month for the air bearing work( tool and cutter grinding shop). Ours' is the aqua marine blue. Have a great day.
  13. G

    Harig air flo spindle instructions

    Hi Tim here. Something I do prior to running the dia. in the AB. When I do my rotary grinding, ie. cut off square back, I often "neck" the cutters. I grind approx. 60-75 thou into the shank with a 1/2" wide wheel. walk it just slightly into the start of the flutes so as to not take too much...
  14. G

    Ever shorted two electrical lines with result being light so bright you can't see ?

    Hi Tim here, no big arc but laughs from my co-workers. In a former life used to work at a plastic factory. while making sandwich bags--the front end(stacking/counting) finished bags for packing, has a static bar so bags lay flat for packing. sometimes things ball up. one must be aware of...
  15. G

    Harig air flo spindle instructions

    Hi Tim here. If you do not have the spring load that allows you to "pull away" from the wheel, you might use a slightly larger(wide not thick) rest that can have a curve or angle on it. This would allow you to get the flute on the rest prior to contact with the wheel. The area where contact...
  16. G

    Harig air flo spindle instructions

    Hi Tim here, I run the "air bearing" for my cutter grinding service. I run 140 psi for smoothness. There will be some(minimal) leakage of air from the bearing, excess leakage might be caused by several things but that's another post. My set-up has a protractor ring that goes on the front of...
  17. G

    Problems sharpening D2 planer knives.

    Hi, Tim here. If you are grinding dry, I would go with the 38a(white) in a 46 or 60 grit. No harder than an "I" with a thin as a dressed cutting rim as possible. The wheel needs to cut free and be able to break down. Light cuts to avoid heating up(that would cause the bow). You will need to...
  18. G

    End Mill Sharpening , NEED HELP

    Hi Tim here, I would say just box them up and send them to me. Burke's Precision Grinding. But if you care to "roll your own", I will let you look up my skirt. I run them on a cincy#2, extended spindle(3") with a small doughnut wheel make it look like a dish wheel--3-4inch dia. kick the speed...
  19. G

    grinder index ring/free

    Hi Tim here, that looks like an index ring that would go on the workhead for a cinn #2 tool and cutter grinder. I have a 32-24 and 20 ring for mine. Have a great day Tim
  20. G

    Who sells parts for Dumore TP Grinder?

    Hi, Tim here either i'm a doofuss(ok I am) or the message didn't come thru. You can emaill me if you want. [email protected] have a great day Tim

ABOUT PRACTICAL MACHINIST

With more than 10.6 million unique visitors over the last year, Practical Machinist is the most visited site for metalworking professionals. Practical Machinist is the easiest way to learn new techniques, get answers quickly and discuss common challenges with your peers. Register for the world’s largest manufacturing technology forum for free today to stay in the know.

Learn more about us.

STAY CONNECTED

Facebook Instagram YouTube LinkedIn Pinterest Twitter Tiktok

Register Become a forum member. Register today.

Sign Up Sign up for our e-newsletter.

© 2023 Copyright Practicalmachinist.com. All Rights reserved.

Top