Wet grinding "attachment"

[BladeMan]

Hi all,

want to show you a small and simple but effective working way i constructed and 3D printed for my grinder. BTW, I print with PETG only so this prints are really tough.
A simple solution for wet grinding, it is attached on top of my grinder with 4 magnets which are inside the housing.
This dropper can be regulated and is made for standard 2" wide belts.
What you all think?

On the grinder in place:

Backside, showing the magnets:

And some vid showing it in action:

 

[Triple Stripe Knives]

That looks great! I was thinking of building something similar

 

[DukeHarley]

Hi all,

want to show you a small and simple but effective working way i constructed and 3D printed for my grinder. BTW, I print with PETG only so this prints are really tough.
A simple solution for wet grinding, it is attached on top of my grinder with 4 magnets which are inside the housing.
This dropper can be regulated and is made for standard 2" wide belts.
What you all think?

On the grinder in place:

Backside, showing the magnets:

And some vid showing it in action:

I picked up a Kool Mist air mister and it helps me get an addition pass or two on the grinder when doing thin kitchen knives.

 

[Stacy E. Apelt - Bladesmith]

A drip system will work, it is just really messy as well as not all that efficient. The spray gets on everything much more than it does the belt and blade.

The Kool-mist clones on Amazon are so cheap now $10-20), it is a no brainer to use them instead of a drip system. They provide a cold mist to cool the blade and lubricate the belt. The Kool-mist concentrate ($45/gal.) is worth the money, so get the real stuff from them or a similar product from an industrial supplier. A gallon of concentrate makes 33 gallons of spray mix, which will last a very long time for most knifemakers.

It is best to use 80-100 PSI air to get proper atomization of the water/lubricant. Set right, the mist does not spray all over the machinery and shop.

A fun fact is that there are 58,300 standard drops of water in a gallon. Because of surface tension, all drops are almost equal. Using this, you can calculate how long a drip system will take to use a gallon of water. If your drip system is dripping 4 drops a second, it will take 4 hours to use a gallon.
Plumbers often state that dripping faucets need replacing because they waste so much water and it costs you lots of money, but this is pure BS. A fairly rapid faucet drip wastes about 500 gallons a year. Water costs about $0.01 a gallon, so $5 a year in wasted water. It would take 40 years to pay for itself if you have a plumber do the work for the normal cost of $200.

 

[Michael Black]

A drip system will work, it is just really messy as well as not all that efficient. The spray gets on everything much more than it does the belt and blade.

The Kool-mist clones on Amazon are so cheap now $10-20), it is a no brainer to use them instead of a drip system. They provide a cold mist to cool the blade and lubricate the belt. The Kool-mist concentrate ($45/gal.) is worth the money, so get the real stuff from them or a similar product from an industrial supplier. A gallon of concentrate makes 33 gallons of spray mix, which will last a very long time for most knifemakers.

It is best to use 80-100 PSI air to get proper atomization of the water/lubricant. Set right, the mist does not spray all over the machinery and shop.

A fun fact is that there are 58,300 standard drops of water in a gallon. Because of surface tension, all drops are almost equal. Using this, you can calculate how long a drip system will take to use a gallon of water. If your drip system is dripping 4 drops a second, it will take 4 hours to use a gallon.
Plumbers often state that dripping faucets need replacing because they waste so much water and it costs you lots of money, but this is pure BS. A fairly rapid faucet drip wastes about 500 gallons a year. Water costs about $0.01 a gallon, so $5 a year in wasted water. It would take 40 years to pay for itself if you have a plumber do the work for the normal cost of $200.

This is interesting! I did a quick search on Amazon but wasn't sure exactly what to search for, and it looks like there are different styles. Would you mind sending a link or two of a type that would work on a 2x72? Thanks!

 

[DukeHarley]

This is interesting! I did a quick search on Amazon but wasn't sure exactly what to search for, and it looks like there are different styles. Would you mind sending a link or two of a type that would work on a 2x72? Thanks!

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Here’s a link to a picture of the one I bought. Works really good. It’s not a cheap one but a cheap one will do fine as well.

 

[Stacy E. Apelt - Bladesmith]

Amazon.com : kool-mist

 

[Mecha]

A drip system will work, it is just really messy as well as not all that efficient. The spray gets on everything much more than it does the belt and blade.

The Kool-mist clones on Amazon are so cheap now $10-20), it is a no brainer to use them instead of a drip system. They provide a cold mist to cool the blade and lubricate the belt. The Kool-mist concentrate ($45/gal.) is worth the money, so get the real stuff from them or a similar product from an industrial supplier. A gallon of concentrate makes 33 gallons of spray mix, which will last a very long time for most knifemakers.

It is best to use 80-100 PSI air to get proper atomization of the water/lubricant. Set right, the mist does not spray all over the machinery and shop.

A fun fact is that there are 58,300 standard drops of water in a gallon. Because of surface tension, all drops are almost equal. Using this, you can calculate how long a drip system will take to use a gallon of water. If your drip system is dripping 4 drops a second, it will take 4 hours to use a gallon.
Plumbers often state that dripping faucets need replacing because they waste so much water and it costs you lots of money, but this is pure BS. A fairly rapid faucet drip wastes about 500 gallons a year. Water costs about $0.01 a gallon, so $5 a year in wasted water. It would take 40 years to pay for itself if you have a plumber do the work for the normal cost of $200.

He's grinding on titanium so the belt speed is really slow - not much spray. At high speed it would be flying everywhere!

 

[bleasure]

i'm sorry but between that last comment and the title this is the dirtiest reading thread on the forum

 

[Michael Black]

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Here’s a link to a picture of the one I bought. Works really good. It’s not a cheap one but a cheap one will do fine as well.

Perfect, thank you! I'm gonna have to snag one soon.

 

[BladeMan]

He's grinding on titanium so the belt speed is really slow - not much spray. At high speed it would be flying everywhere!

This!
Thank you for the advice on the kool-mist. But the drop/drip method works just fine for me.
Like Mecha said, i am grinding very slow, at 20-30% speed of the max speed of my grinder (max. speed is 22 m/sec).
Additionally, my grinder is in a closed housing, all parts are either stainless or industrial grad paint coated.
I can tell that about 99% of all dirt/dust is inside the grinder housing and the most of it is sucked out into a heavy duty steel cyclone/barrel.
With the water droper the mess inside is not really a lot worse then grinding dry, it's a litte wet on the bottom of the grinder and that's it. Since i clean everything at the end of the day it's no big deal.

BTW i also made one with 4 droping outlets instead of 2.
I really doubt that i use that much water a year too, but to each his own.

 

[Fred.Rowe]

A drip system will work, it is just really messy as well as not all that efficient. The spray gets on everything much more than it does the belt and blade.

The Kool-mist clones on Amazon are so cheap now $10-20), it is a no brainer to use them instead of a drip system. They provide a cold mist to cool the blade and lubricate the belt. The Kool-mist concentrate ($45/gal.) is worth the money, so get the real stuff from them or a similar product from an industrial supplier. A gallon of concentrate makes 33 gallons of spray mix, which will last a very long time for most knifemakers.

It is best to use 80-100 PSI air to get proper atomization of the water/lubricant. Set right, the mist does not spray all over the machinery and shop.

A fun fact is that there are 58,300 standard drops of water in a gallon. Because of surface tension, all drops are almost equal. Using this, you can calculate how long a drip system will take to use a gallon of water. If your drip system is dripping 4 drops a second, it will take 4 hours to use a gallon.
Plumbers often state that dripping faucets need replacing because they waste so much water and it costs you lots of money, but this is pure BS. A fairly rapid faucet drip wastes about 500 gallons a year. Water costs about $0.01 a gallon, so $5 a year in wasted water. It would take 40 years to pay for itself if you have .a plumber do the work for the normal cost of $200.

I would like to add my voice to this comment by Stacy. The advantages of using a flexible, jointed delivery system are many. When grinding a thin heat treated blade it's important to have the cooling mist applied directly to the area of the blade that is being worked. If I am grinding along the belly and the tip of the blade, I direct the cooling mist directly to this area. Keep in mind a thin edge heats up very quickly and without the mist being applied directly to that area of the blade it's easy to overheat the edge. If you are sharpening an already developed blade this is extremely important.
Being able to position the entire cooling system using a magnetic base is also a big advantage. You never know where the cooling spray is needed. I applaud your inventive spirit in making and trying out these different styles of cooling systems, but keep in mind what the goal of setting up a cooling system for grinding and sharpening blades is; they have to be kept cool at all times, there is no option if you want to end up with a blade with a truly sharp and well heat treated edge.
Regards, Fred

 

[Case_D]

This guy has started selling a pre assembled kit. Intended for sharpening on the grinder but whatever

2x72 Sharpening System

2x72 Sharpening System This is an add-on for any 2x72 Belt grinder. It will magnetize to any steel surface. Misting system (assembled and ready to use) 1 Sprayer 1 clear hose for water injection One way valve and filter for water All fittings to attach to 1/4 quick connect for air (sealed and...

housemade.us

I was gonna pick one up myself after getting an air compressor.

 

[BladeMan]

Thanks Fred, but keep in mind i grind heat treated Titanium only at very low speed but with lot of torque.
I sharpen everything by hand on wetstones, freehand.
The blade is more or less completely covered with some water when grinding, i also dunk it after each pass and i only use 3M cubitron II belts. the blades are not literally but really only hand warm even if ground thin.

I DO NOT grind steel. This thing i made just works fine for me. I don‘t see the need for a mist system at all. It don‘t work for you which is perfectly fine.

 

[Fred.Rowe]

Thanks Fred, but keep in mind i grind heat treated Titanium only at very low speed but with lot of torque.
I sharpen everything by hand on wetstones, freehand.
The blade is more or less completely covered with some water when grinding, i also dunk it after each pass and i only use 3M cubitron II belts. the blades are not literally but really only hand warm even if ground thin.

I DO NOT grind steel. This thing i made just works fine for me. I don‘t see the need for a mist system at all. It don‘t work for you which is perfectly fine.

This is what makes knife makers such a productive and creative group of people; that need to adapt in the shop. I'm pleased you have found the tool that works for your needs in your shop. Enjoy, Fred

 

[Storm W]

I use a spray bottle of soapy water. I want to get a cool mist system once I get my shop set up but that's going to take awhile.