Radius Grinder Platens, early sale

Nathan, if I counted correctly, you still have one of these left. I'll take it if you do. sending email now.

randy
 
Thank you everyone for another successful platen sale. These will start shipping tomorrow.
 
It turns out that i only live about 15 minutes from Nathan so i picked up my platen in person yesterday. The fit and finish on this block of steel is top notch and Nathan is great to deal with.

If anybody is interested, these will work on a Bader BIII as well. All I had to do was mark and drill holes in an extra flat platen i had and mount the radius platen to it.

randy
 
Thanks Randy. It was very nice meeting you. Sorry I momentarily forgot you were coming out, I'd just had the most remarkable phone call right before you rang and my head was still elsewhere.

I'd been wondering how folks were mounting these on the Bader. Now I know...
 
Nathan the Machinist said:
These are precision machined of A2 steel and hardened to HRC 61-64. It is 1/16" shy of 8" to fit between the rollers, 2" wide and has the KMG 1/4-20 6.75" center to center mounting pattern. $100 shipped continental US. These are Sold Out, thank you

This is not the main platen sale. These are some 36" platens that were made and sent out for heat treat before the rest were done. The majority of the run are out for HT now and there will be another sale in a couple weeks with 36", 48" and a couple 72".

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There are nine 36" for sale.

In using these platens I have found the effect is subtle, but noticeable. It isn't a flat grind, and it isn't a hollow grind. I believe this is a historically accurate grind for blades ground in yesteryear on really big stones. I see this being a cool grind for blades made in an older style, and blades like kitchen knives that you would want a full height grind on a tall thin blade.

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This lot of radius platens is different the previous runs. If you look closely, you'll see a tiny hole in the surface of the platen. On the opposite side of the hole I have cut a 1/4" NPT pipe thread (a regular taper pipe thread) which you can (if you want) use to pressurize your platen with air.

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I wish that I would have thought of this myself, but this is a feature that I have added by request. However I have tried it and it does work. One of the problems of grinding on a radius platen is heat, and the addition of air between the belt and the platen both reduces friction and cools both of them. It is possible to grind with high belt tension and a large contact area at your highest speed for hours at a time without excessive heat buildup. This only works well with a stiff belt. Once you get into something like a j flex you will find the air cushion rounds the leading and trailing edge a bit. At this point you will want to move away from the air zone or reduce air pressure. I get best results with the air pressure between 5 and 50 PSI.

You don't have to use air to use these platens. This is a feature I have added for folks who do extended grinding and have problems with excessive heat build up.

If this platen will fit your grinder and you would like to buy one of these, I need you to please follow these instructions to help me keep up with everything (otherwise folks will fall through the cracks).

1: State your claim in this thread.

2: send me an email (not a private message) njcarothers at windstream dought net

The email should include what size you are buying, (in this case, a 36" platen) your BladeForums handle (i.e.: "Nathan the Machinist"), your actual name, your shipping address and your paypal email address.

I will send a PayPal invoice to that email.

3. Pay the paypal invoice. Once it is paid, I will ship your order to the name and address you gave in your order email.

If you don't want to use paypal, we can arrange to send a check.

I hope there are no shortages, but if there are, it will be based upon first come first serve who posts in this thread. I have to do it this way to keep things sane.

Thanks,
Nathan
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Nathan, These look great and I would like to get one of each. But will have to do it one at a time.. :)

I think I will start with a 48" Please put me on the list and let me know when its ready.

Thanks
Randy
 
A C Richards said:
How many 72's. I would like to be put on the list also for one. Already have the 48 and it is great.
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Hey Chuck,

I'm glad you like your 48. I like mine too.

There are only going to be three 72's for sale and that is if I don't keep one for myself. I didn't make many because they're specialized for certain kinds of kitchen knives. The hollow will be so subtle you won't be able to see it, so I'm not sure it would be very useful to many people because it will look like a flat grind.

I will put you on the list to contact when the sale thread starts.

Thanks
Nathan
 
HHH Knives said:
Nathan, These look great and I would like to get one of each. But will have to do it one at a time.. :)

I think I will start with a 48" Please put me on the list and let me know when its ready.

Thanks
Randy
Click to expand...

I will put you on the list to contact when the sale thread starts. :thumbup:
 
I have received payment from everyone. All of these have shipped, with the last couple going out this morning.

Thanks,
Nathan
 
Nate, Will you be making more of these? By the time I made it over to look at the second for sale thread. They were all sold in the size I was wanting. :) Please let me know. I will gladly send you a deposit to assure that one of the next round of platens has my name on it..

Thanks
Randy
 
Randy,

Really the main problem is I underestimated how quickly these would sell. I figured I'd end up with a bunch sitting on the shelf.

I will get more material on order today or tomorrow and do another run of 20 or 30 platens as soon as a machine opens up, which should be some time this summer. I'm working 70/hr weeks right now, but it has to let up soon.

I can not take orders or prepayment because it always ends up being more than just one or two people and I can't keep up with it all. So there will be another sale thread with orders going first come first serve who posts in that thread. It is the only way I can do it and stay sane. I will, however, try to remember to send you an email.
 
I received mine today. It isn't a knife but what a beautifully done piece of work !!! Many thanks Nathan !!! Frank
 
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