If the power feed works for you who cares what the negative ones have to say. If we hadn't let the imagination in us to at least try things we would still be travelling by horse and buggies. As a hobby machinist I get very good ideas from the videos of you all who post them. Remember Lee if only 1 person learns something from watching your videos then you have given him or her something no one can take away from them. I personal love the projects and things you post. Thanks for the time and work you put into them to share with us.

Arguably Lee makes some of the best machining videos for a hobby guy like me. Thanks for all your help and ideas.

Great job, it looks like it's supposed to be there! I did something similar on my elite ar5-e tool and cutter grinder, based on your design.I mounted the bodine gear motor to the machine frame though, on a pivot where the drill attachment would normally go. On the table i have a block with a 3/4" shaft (for the reciprocating arm to mount to)To handle the y axis table travel (only 5") i have a 5/8" thomson shaft mounted (90 degree)on the adjustable x axis motor sliding block. The arm has two side by side roller bearings that attach to the 3/4" table shaft, on the other end is 5/8" thomson linear bearing. The linear bearing and shaft handle the 5" y travel. The x axis length adjustment part is almost identical to yours. I mounted it to the frame so the arm can be removed, the motor is on a pivot and can be swung out of the way when in regular use. Less than 2 minutes setup time. Next is a 50:1 worm wheel on the z axis. The worm gear gets attached to the backside of the z axis adjustment handle, the worm gets mounted to z axis body/frame, one turn of the worm is two thousands z travel. It flips up out of the way for regular use. It's also apart for maintenance and servo motor drive upgrade for spindle and new spindle bearings. I will post it when finished.

Nice job and great explanation. I'm going to make one for my grinder. Lee, consider grinding the magnetic chuck in place to get it dead on 0.0000. Turn the magnetic chuck on and grind it's full length and width in one setting. Always measure the chuck run-out with the chuck on too. Also consider upping the linear velocity of the table about 25%. You will get a ripple free finish. For reference the table speed should be about as fast as windshield wipers on high.

I made this modification to my surface grinder recently. I did decide to mount the motor rigidly to the cross slide. I must say it works wonderfully. Its smooth as butter and quiet as a church mouse. Wonderful idea! Thanks for sharing your idea.

Thanks for the info on the grinder power feed. I thought you were using a stepper motor setup. You do excellent work Mr. Pragmatic Lee. That 29 minutes went fast. Time flies when you're watching an interesting video. Thanks! 'Til next time....Keep Machining!

Absolutely fantastic idea and design on the feed mechanism Lee. And your willingness to tackle the threading issue on the lathe spider shows great determination.

Something simple confounds a lot of folks. That is what the power feed design is. The spider for the rear is one of those projects that I’d like to do

Thanks much for sharing this Lee !!!!! We really appreciate it.. Nicely done.. You are inspiring

I sure do like your attention to detail. Good demonstration.

I REALLY LIKE YOUR POWER FEED. Very good explanation of of how to make the outboard spider.

Hi Lee nice to be here and have some shared time with you in the shop. What a great arm for your surface grinder we are very impressed, you really did no longer wish to grind by hand in the x axis. We did not know we have the same PM1127 as you do (we never need a lang bar feed action for ours, we just love KZfaq always learning. It the PM is our general shop 1 off piece maker when we need a part or tool part larger then our micro machine lathes can produce. Thank you for sharing with us, Lance & Patrick.

Brilliant mod to the surface grinder. Can’t wait to pick one up some day.

Awesome video thanks for showing us all the feed and hod it was made and how it works. 👍👍👍👍👍 Watching in Alabama

Excellent video Lee keep up the great work

enjoyed...great mod/addition to the surface grinder

The powerfeed looks nice and very practical.

looking good mate! well played... thanks for sharing!

Lee very nice project what a great idea

That power feed looks interesting. I have been thinking about this for a while.

Very clever feed.

Nice work MrPragmaticLee. Pragmatism at its best! If my Jones and Shipman 540 did not have hydraulic feed, I would be making one of these right now.

I have been waiting for the promised video on the power feed. I am interested in it for my grinder.

I love the power feed. Very creative solution.

Excellent information. Thank you

I'm willing to suggest that the added weight and pressure from the drive motor is causing the deviation on the right side of the table ? Love the fabrication work and highly appreciate you sharing this. Just picked up a Boyer and Schultz myself hoping to get up to speed on these machining processes that my father put away long ago. Brought home my first mill recently and he lit up as he ran a Bridgeport for 10 years before his prototyping/maintenance mechanic carrier . I'm hoping to get some hands on with him before time takes control of the situation. Love the videos Mr Pragmatic,

Love both ideas

Love it. I would like to build it for my surface grinder what a great project thank you

Nicely done and you have no oil leaks as on a hyd. grinder. Great job

GREAT VIDEO + WORK !!!

well thats 2 things i gotta have now thanks for the share

Thanks for the great ideas.

Cool work 👍

I always say if it works for you its great.. Good video.

Thank you for showing your power feed. Great design. I have a suggestion for making it a little simpler to adjust the stroke length. Cut a slot in your arm to accept a through stud in the center with a hand lock nut to retain it to your motor adapter. Modify your motor adapter with a female slot to accept the arm and no outside cover. There are lots of ways to add power feed to a grinder. I was thinking about using a stepper motor to drive the hand wheel via a belt, and use limit switches to set the travel ends. Your solution appears to work very well. The only issue is the oscillating travel speed, but it doesn't look like it's causing you any problems.

Nothing wrong with anything you have done . It works if you work it , You did and it great ! ..ENJOYED ..

Hat off mate works real good I would never be able to get a surface grinder but have now gained an idea to use something similar over the top of a belt sander have worked it out on paper will be a down time project project but will work fine

Thank you for sharing, regards Frank

Thanks for sharing!

Add my thanks for this video, I've been looking forward to it

I think it is a great idea

Thanks Lee!

I think the power feed on the Grinder is COOL. Only problem I see is possibly getting something tangled or wrapped around it while it’s spinning.

I like the power feed, very clever. I would love to have a spider on the outboard side of my lathe but so far I have not made one. Too lazy I guess. Do not pay any attention to the nay sayers and the rain cloud onlookers. If they do not understand it then it has to be bad in their opinion. I have been watching you since you got started on youtube and if you say something will work I have every reason to believe it will.

Vare Vare nice video

I have a walker 6x12 which which looks identical to yours. (Harig bought them I think) It has a rack and pinion. I’m hoping to add a power feed to it like yours. Thanks for sharing. I still would love to see any build videos on the project.

You can grind that magnetic chuck in right as it sits on the machine. It's a simple thing to do. You should be able to get that thing dialed in perfectly. The only thing that would prevent it from being prefect, or close to it, would be wear in the ways.

Great modifications! You have some of the best projects on KZfaq imho. I have a lathe just like yours but it's called "Nova 290vf". The lock nut you took of is used to adjust the spindle bearings. Have you made any locking feature on the spider?

Simple and effective. Any thoughts on something similar as a powerfeed for the other axis? You’re a smart and inventive guy, I think you could do it if you put your mind to it with the same motor, linkage and some limiters. Pay no mind to the nay sayers, I am always impressed with your k.i.s.s method of solving problems or upgrading.

I love that. Very intuitive. Do you think a counter weight on opposite side like a fixed pendulum would take that slight pause and bump out of it. It would keep a steady pressure on it but like you said its working fine and not causing a problem so its fine like it is. Great idea though.

Vare nice sair I am so happy

Hi Lee Thanx for your time an effort you put into your video's I want to do the same on my Targa 612,, Can you please tell me how long your pitman shaft is ? and length of flat ali plate that goes to motor drive thanx

Lee great job and don't see any problems with it. Have you ever seen a twin shaft system with eliptical gears set up to make the table speed approximately the same from end to end? The guys worried about a speed change consider it.

Wow, what a great idea! I am thinking about getting a Harig Super 612 for my little shop. Can you tell the bases dimensions, the length of the table, and the height to the top of the tube protecting the lead screw?

You think there would be any long term concerns with the arm torquing the table around unevenly wearing the ways?

Hi,lee, how's the flat bar screwing up with round rod?

Is the a more complete video available??

I found you video excellent explain I will love it ,Need the information of the motor Please be safe with cov.19 thank Antonio

question, did you have any kind of preference when you bought your surface grinder . I want to get one but I am having trouble deciding what to get not that I get stuck with something I can't get parts for. Not looking to spend a whole lot of money its only for a hobby.

exellent video lee thanks for sharing this info as i have the same harig grinder as you have. except for i have a rack and pinion gear for my table movement. i would love to build the same riggin as you have there. i would like to know what diameter is the round piece hooked up to your motor? you didnt mention that in the video.

Hey Lee, I have a Boyar Schultz 612 and my table wheel pulls out to a neutral position and doesn't spin. Try your Harig and see if it does the same thing. It just might save you from taking a whack to the sack. :-)

I want to order the same motor that you have used, What is the Specs on it.Very nice conversion.

Hi Lee: It is possible for you to send me the link to those DC Motors? By the way, maybe you should clarify to your viewers that the torque is in In.Lbs. not to be confused with Ft.Lbs. Thanks from Toronto, Canada Jorge

Greetings Friends, I would like to know if you can give me the specifications of the engine you use in advance, thank you

Plus you do realise that every grinder jumps slightly whenever direction changes.. maybe a tenth or two so try to stay away from grinding at the extreme left or right...

was this all your idea? genius

Tidbit video???

Assuming of course the very first thing u did was grind that chuck when the grinder was put on your floor.... Your supposed to grind your chuck anytime machine is moved

that looks like my design on my vintage delta surface grinder I did over 6 years ago. video is here kzfaq.info/get/bejne/rLF_iceisdPPdmw.html

That's not your chuck that's the ways in the machine ... The center is where the ways wear most

Hate the music.

Rather bad audio and the lighting makes it hard on the eyes.