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Vladislav

Making grinder. I'll start with the project.

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Hello everyone!

I'm originally from Russia, now living in the Czech Republic and begin to build a grinder.

I will begin to lay out drawings of the project (as I see it, my machine), criticism and questions - welcome!

 

xy8lGOZ.jpg

 

 

dYFyewQ.jpg

 

 

f0NtsTo.jpg

 

 

1Gvtqv1.jpg

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Looks pretty good to me. Does the belt tension arm use a spring or another form of resistance to deliver the tension against the belt?

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Will spring between the arm and the housing. Now I think - what is the optimal force of the spring? With a length of about 55 mm (about two inches)

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Looks very well thought out. Does the machine pivot to the left and provide for a horizontal grinder? What will serve as the axle for it to pivot upon if so? I do not see this part in the drawing. My only suggestion, and it is a small one, would be to make the metal the frame is cut from thicker. 12mm or thicker would be good. From your drawing it looks to be 4-5mm? Forgive me if I my sense of scale is off. The extra mass is very effective at dampening vibration and will make the machine run smoother. Yes, it does cost more but, in my opinion, worth the cost.

 

~Bruce~

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The whole idea - my colleague and friend, I am developing it further. Body - steel 10 mm, base - 15.

 

D4UdTMG.jpg?1

 

NI24ztd.jpg?1

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Good job. Serious machine turned out. B)

Edited by Vladislav

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Thank you

 

Sam

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3 wheels. 300, 250 and 200mm. Ball bearings will arrive tomorrow.

Ye-es!

...and small wheels.

 

6l44Gq9s.jpg LSy65n7s.jpg u6unrK2s.jpg S39PWx3s.jpg

Edited by Vladislav

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Vladislav,

 

The two upright pieces of steel, (I've used your photo and labeled them ONE and TWO) that bolt to the base plate, and the plate that the motor mounts to (THREE) do not look "right" to me. Please understand it is my tendancy to over-engineer but, I've never been dissatisfied in doing so. I would be concerned with picking up vibration from the two upright pieces and that the plate the motor mounts too might "flex" a bit, especially with the weight of the motor on it.

 

As an aside have you seen the M.A.P.P. Arm? Thread on BladeForum with lots of lovely pictures! I should have thought of it sooner but...

 

D4UdTMG_jpg,q1_pagespeed_ce_djz7QcrAe2.jpg

 

~Bruce~

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Vibration does not appear if the construction is tough and balanced. In the picture - a prototype of aluminum.

 

R8ZMBKN.jpg

 

When it work, it is possible to put coin on an edge. My grinder have a construction from a steel 10 mm, I think, for me the vibration will not to plague.

 

Thanks for the links. They are very useful for me.

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Very nice! Well done.

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I thought and started just five. And I will open up a company for production grinders. :)

 

OlyulS0.jpg

 

UPD: Vibration will not be exact. They are powerful and heavy.

Edited by Vladislav

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Holy crap! You don't screw around, do you?

 

Do you know Petr Florianek? He is also in Czech Republic and a member of this forum. If he's close to your location he might be a good tester.

 

Cheers!

 

Dave

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I just saw your question about the MAP arm.

 

I own one of those and really like it. However, I do think it could be improved. The MAP arm is adjustable, but it's hard for one person to make precise adjustments to it. Two nuts need to be loosened at the same time to adjust Z and Y axis, so you end up needing two hands to hold/position the heavy table, and one hand on two wrenchs ready to tighten the nuts when the table is positioned perfectly.

 

A design like the MAP arm that could allow precise adjustment of the table's position on the grinding surface would be an awesome invention (and one I'd rush to purchase).

 

Cheers!


Dave

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Holy crap! You don't screw around, do you?

Do you know Petr Florianek? He is also in Czech Republic and a member of this forum. If he's close to your location he might be a good tester.

Cheers!

Dave


Yes, it screws - I do not have a welder. Everything is still ahead. :) (very rigid construction turned)

zJzQSaD.jpg

About Petr Florianek I heard much, but as yet we do not acquainted. This, I hope, too still will be.
WBR.

UPD: About MAP arm - I think... Edited by Vladislav

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Contact wheels are ready. I'm happy. ^)

Phase 1

0bohePq.jpg

 

Phase 2

PmIYSYu.jpg

 

Phase 3, finale

qjbTw75.jpg

 

B)

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And plus two ideas: the machine with cover for protection in event of breakage of the belt and the machine without rotate options. Not all need it, right?

 

Idea 1

 

MYTlm21.jpg

 

Idea 2

 

lQm1cYD.jpg

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The rotation option is a very good option. I only know of one other grinder with that option, the TW90, and it's very expensive.

 

Do you have any idea what you will be charging for these?

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That tool rest in the bottom diagram looks brilliant. I hope you offer that as an accessory that fits KMG's.

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The cover will just get in the way when changing belts, and most people will end up taking it off and leaving it off. Otherwise, that's a wonderful grinder!

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The cover might be a good idea if you're selling to businesses who have safety officers that require such things. I suspect that is why Burr King grinders have them. But Alan is right. Most individual bladesmiths will just see the cover as a nuisance.

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