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Old 11-17-2020, 02:43 PM
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dynafiles or something just like them

I bought my two dynafiles in 1987 from Dynabrade in Tonawanda NY and one died completely two years back and today the remaining one shows serious signs of giving up the ghost. I had each of these rebuilt twice, Neither can be rebuilt at this point. . The factory no longer supports them and has a new version made in China.
I really need to be able to chase inside bevels on most of my work and would be lost without the tool. Does anyone have recommendations of other manufacturers of the tool. I know Jordan referred to another at one point. Anyone else?
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Old 11-17-2020, 07:18 PM
Eben Horton Eben Horton is offline
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I posted one a wile back. I’ll see if I can’t find it
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Old 11-17-2020, 07:20 PM
Eben Horton Eben Horton is offline
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$40.

https://www.harborfreight.com/53-amp...8aAr3AEALw_wcB
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Old 11-17-2020, 07:26 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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Why do you consider Dynafile to be preferable to the ones sold now? There are many electric ones? I have a much cheaper version of the Dynafile- air powered- but I had to remove the belt cushion on the arm and reduce the tension on the belt to get a more “soft” feeling

Last edited by Michael Ahlefeldt-Laurvig; 11-17-2020 at 07:30 PM. Reason: Better wording
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Old 11-17-2020, 07:59 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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$40? That’s just a tad more than a decent case of beer here. When I was 19 I did a one year stint in a factory making cardboard boxes, waiting to be drafted for 7 months.
I bought a Flex angle grinder, I think it was a month salary- most expensive thing ever.
Later I bought a stereo, the Flex is still with me, the stereo is not.
That is a 44 year old grinder- real cheap
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Old 11-17-2020, 08:28 PM
Eben Horton Eben Horton is offline
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I know.. $40 is too expensive.

$30!!!!


https://www.harborfreight.com/38-in-...der-60627.html
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Old 11-17-2020, 10:06 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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Ha ha! Great
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Old 11-18-2020, 06:35 AM
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The harbor freight one is an 18 inch. I have about two hundred 24 inch belts which fit the original tool. I prefer , but am not wedded to the pneumatic units. I found one used on ebay for 200 bucks and will likely do that. My process was /is brutal on the tool so a used one will likely last as lonf as the remainder of my career. The dynafile from the '80's was really a wonderful tool. It is simply no longer supported.
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Old 11-18-2020, 08:12 AM
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Quote:
Originally Posted by Michael Ahlefeldt-Laurvig View Post
Why do you consider Dynafile to be preferable to the ones sold now? There are many electric ones? I have a much cheaper version of the Dynafile- air powered- but I had to remove the belt cushion on the arm and reduce the tension on the belt to get a more “soft” feeling
****
I also have a lot of arms for the original and they completely allow for the "softness" you allude to. I need that as well. The belts I currently have are both 1/2 and 1/4 inch wide and that too gives a lot of flexibility.

Also, I'm an old dog. These new tricks aren't suitable
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Old 11-18-2020, 09:40 AM
Eben Horton Eben Horton is offline
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24”
Here you go


https://www.grainger.com/mobile/prod...P7A1P:20501231
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Old 11-18-2020, 04:04 PM
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and only 600+ dollars!

The arm in the picture is the one Michael said had no give, and no it doesn't. I have a lot of arms and the question would be whether they fit the newer file.
We really brutalized those things when we were in the heyday of making cut forms but that's just not the case now. A used one should last the remainder of my career and even 200 bucks seems like "Ouch".

What was also discouraging was that with all my older, brand new belts at a buck a piece, had their adhesive fail from just sitting. I had to buy a bunch more belts to make things again. a 500 belt in Aluminum oxide can't be had.
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Old 11-18-2020, 05:14 PM
Rick Kellner Rick Kellner is offline
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While reading reviews on a bunch of these tools recently, I finally homed in on the Makita version. While I have no doubt that the Dynafile was the premier tool for decades, it seems that there were a lot of complaints about a downgrade in quality recently. More plastic parts, etc.

Blue brand seemed a potentially reasonable choice between HF and something that costs an arm and a leg. I have yet to try one out, though.
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Old 11-18-2020, 06:04 PM
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I looked at Makita. It's 18 inch. Not long enough.
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Old 11-18-2020, 09:47 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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Id buy the 200 dollar used one, if you have belts, all others are $500 plus.
There’s manufacturing companies that will make any belt size and any grit
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Old 11-18-2020, 10:00 PM
Michael Ahlefeldt-Laurvig Michael Ahlefeldt-Laurvig is online now
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But when did money come into the equation? We just wanna blow glass
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Old 11-19-2020, 07:55 AM
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Quote:
Originally Posted by Michael Ahlefeldt-Laurvig View Post
But when did money come into the equation? We just wanna blow glass
***
June 1977 at Heller Gallery. Peiser sold a vase for $3,500 dollars. As Fritz said "Money changed everything"
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Old 12-20-2020, 04:46 PM
Rick Wilton Rick Wilton is offline
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came across this

dynafile for $225 Canadian... if it helps

https://www.facebook.com/marketplace...0856054992329/
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  #18  
Old 12-20-2020, 06:33 PM
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Thanks Rick.

I've dropped this search since snow and disease took the helm for the week. I had a woman who said she wanted my work until I showed pics which turned into she wanted me to make something else on Spec.

I'm sure you've never heard of such a thing.

I'm blessed really. When I stopped the big shop, I kept the tools. I have more tools now in a one man shop than most could imagine but it still hurts to see wonderful tooling die of old age and I've got a bunch.
When I ran the shop in Santa Fe, I sent out the big horizontal grinders to machine shops every forty hours. Alone , here, I've kept my 120 head true for 14 years now.
The real insult was the glue joints on the belts for the dynafile failing from simple age. There are other tools like that. I open epoxy cans that are no longer viable. I have spray substances that ooze from the cans. My Legs feel a lot like that these days.

So thanks,again, we'll see what we do and don't do. Eben's grinder looks a lot like a blender base to me.
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Old 01-15-2021, 07:10 PM
Hugh Jenkins Hugh Jenkins is offline
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Pete, i bought too many wet SiC belts 15 years ago, and most now give out the minute I turn them on. I have gone to repairing them with Gflex marine repair epoxy and have not had a single failure. Now after years the tubes of epoxy are not fresh but the belts I glued are still going. If the belts were butt joined with a fiber strip, you can make them perfect by cleaning the strip with acetone and gluing under clamp pressure at room temp overnight. If you don't have the fiber strips, you have to do a lap seam. Scrape off the abrasive from one end and do a 1/4 to 3/8 clamped lap. These do bump for a little while but wear down smooth.

Or you can get any belt width and length of any abrasive from SuperGrit. They are out lasting any of the 3M and Carborundum belts I have been using. I got the word on Gflex on this board when I was trying to solve the same problem with 2 1/2 and 3" belts. it has saved me way more than the cost of the adhesive. In fact I repaired a diamond belt that alone had cost more than the glue.
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Old 01-16-2021, 03:13 AM
Rosanna Gusler Rosanna Gusler is offline
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Yep g flex by West system epoxy is the bomb. Read the package insert.
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Old 01-16-2021, 12:57 PM
Hugh Jenkins Hugh Jenkins is offline
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Thumbs up

Yes, and thanks Rosanna. It was your recommendation that saved me a lot of money shipping belts here. I continue to be grateful.
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Old 01-16-2021, 02:02 PM
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I did use that after your last recommendation, got it at a maritime hardware store. I have replaced the other belts but will try it again on some 500 grit aluminum oxide which are simply no longer sold.

The one dynafile holds on and I still have sufficient Rodel pads to change out the 24 inch pumice machine three more times. I have more than enough 1/4 inch thick felt from Universal photonics. Eveline graced me with enough cerium to never think about that issue. Rociprolaps, six with 20 trays. I'll use it until its gone, or I am.
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