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Thread: Universal Grinder Fine Feed Adjuster

  1. #1
    jjr2001's Avatar
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    Universal Grinder Fine Feed Adjuster

    One of the limitations on my tool and cutter (plus surface) grinder was the coarse vertical feed on the motor carriage. I came up with an approach that still allows fast vertical traverse but also allows a very fine down feed for the grinder. It took a bit longer to make than I thought it would but it was worth the effort.

    Based on a simple ramp and using a 5/16-18 piece of all thread, one steel ramp and one brass ramp and aluminum for the housing. It has about .250" travel up or down. The screw moves the ramp by one inch to move the height .250" so it is very fine. Positioning is just by sliding it up or down until the adjuster contacts the motor mount and then locking the brass locking knob. The 1/2-10 original lead screw "floats" in its lower mounting block so when I need the fineness I simply run the adjuster up to the bottom of the grinder mount and back off the 1/2-10 lead screw. Gravity and the brass knob on the left side do the adjusting. The carriage has separate aluminum knobs that lock it in place once the desired height is reached.

    Cheers, JR

    Here is a link to the tool and cutter grinder:
    Shop Assembled Cutter Grinder
    Attached Thumbnails Attached Thumbnails Universal Grinder Fine Feed Adjuster-dscf0001.jpg   Universal Grinder Fine Feed Adjuster-dscf0002.jpg   Universal Grinder Fine Feed Adjuster-dscf0003.jpg   Universal Grinder Fine Feed Adjuster-dscf0004.jpg   Universal Grinder Fine Feed Adjuster-dscf0005.jpg  

    Last edited by jjr2001; 08-26-2016 at 03:10 PM.

  2. The Following 9 Users Say Thank You to jjr2001 For This Useful Post:

    benkeller3 (12-25-2017), Jon (08-26-2016), nashty1 (12-25-2017), Okapi (08-29-2016), Paul Jones (08-29-2016), PJs (08-29-2016), scoopydo (08-29-2016), Toolmaker51 (01-16-2017), Tule (12-27-2017)

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    Thanks jjr2001! We've added your Grinder Fine Feed Adjuster to our Grinding category,
    as well as to your builder page: jjr2001's Homemade Tools. Your receipt:




  4. #3

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    Very cool, JR:

    i picked up an old DuMore toolpost grinder a while back and wondered how to build a suitable feed for it: great work, sir.

  5. #4
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    Thanks rebuilder,
    Please post some pictures of your completed unit when you "get er done"

    Cheers, JR

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    Hi,
    Really a good idea, it can give very precise adjustments with a minimum of calculation, but only if you don't forget the geometry lessons when young at school…

  7. #6
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    Good point.

    So far I just need it to adjust in a very fine increments and it does that quite well. I just ground a 1" ball form a ball bearing and made it flat on one side. Actually needed to turn it almost 1/4 turn for each pass with the grinder. If I need to know a specific amount of travel I will probably cheat and just measure total travel and calibrate the knob to that. I need to engrave something anyhow, just for fun..

    Cheers, JR

  8. The Following 3 Users Say Thank You to jjr2001 For This Useful Post:

    Paul Jones (09-02-2016), PJs (08-31-2016), Toolmaker51 (01-16-2017)

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    Muy original el sistema, trataré de hacer algo parecido en mi cortadora de cerámicos, :aplausos:

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    Quote Originally Posted by jotasierra View Post
    Muy original el sistema, trataré de hacer algo parecido en mi cortadora de cerámicos, :aplausos:
    Thank You, JR

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    Jon
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    Congratulations jjr2001 - your Grinder Fine Feed Adjuster is the Tool of the Week!

    This was a huge week for homemade tools, and we had to cull down the best entries in several rounds. Your Grinder Fine Feed Adjuster, made for your previously-posted cutter grinder, really stood out. Congratulations also on the huge volume of tools you've been submitting. You're up to 34 homemade tools already, and have reached position #33 on our list of most prolific tool builders.

    We also had a nice Backhoe Bucket Quick Disconnect from Frank S, a Drill Press from Grale, a clever Chuck Jaw Truing Tool from olderdan, a Straight Knurling Tool from rossbotics, and very accurate Quick Change Tool Holders from Metaler.


    You'll be receiving one of our official HomemadeTools.net T-shirts:



    Please PM me a mailing address, black/white color choice, and size preference, and I'll get it mailed out shortly.

    And, we've added the wrench-on-pedestal award to the awards showcase in your postbit, visible beneath your username:


    You're our 101st Tool of the Week winner. All previous winners can be viewed here: 100 Homemade Tool of the Week winning tools

    Congrats again and nice work!

  12. #10

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    Hi JR
    The finish you have on the anvil is quite acceptable, what is your motor speed and grinding wheel spec?

    Cheers MM

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