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Power Feed question for Clausing 8520

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Rbeckett

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#2
I emailed them and asked them the same question and they replied that it was not a direct bolt on and I would have to mill my own machine to power feed interface. Hardly seemed worth three hundred bucks for just a part of the kit and having to make the rest. Be careful of the Clausing brand units they are apparently weak and easily strip gears and get damaged too easy. Hope this helps because I was doing the same thing for X and Y on my 8520 when it gets here from CT. The storm up north is gonna slow that down by a few extra days too so keep that in mind if you order anything that moves by truck...

Bob
 

JPigg55

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#3
Thanks for the info. I'd wrote them too, but haven't heard back yet.
I've heard that the Servo type 140 PF is pretty much a bolt on, but runs more than double the price.
 

Rbeckett

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#4
In case you get to looking the Model 8525 is the power fed version of the 8520 from Clausing. You can look up the individual parts for the drives there if you have one from clausing and need the plastic gear they all seem to strip.

Bob
 

truckin23

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In case you get to looking the Model 8525 is the power fed version of the 8520 from Clausing. You can look up the individual parts for the drives there if you have one from clausing and need the plastic gear they all seem to strip.

Bob
Bob I believe you might be misinformed the only difference between 8520 and 8525 is the spindle taper

8520 is MT2 and 8525 is B & S 7 the power feed was just and option from Clausing could be ordered on either model .

Bob G
 

Terry Werm

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#6
Bob I believe you might be misinformed the only difference between 8520 and 8525 is the spindle taper

8520 is MT2 and 8525 is B & S 7 the power feed was just and option from Clausing could be ordered on either model .

Bob G

This is the way that I always understood it also.
 

wa5cab

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#7
And likewise with the later 8530/8535 (2MT/7B&S).

Robert D.
 

Bill Gruby

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Bob I believe you might be misinformed the only difference between 8520 and 8525 is the spindle taper

8520 is MT2 and 8525 is B & S 7 the power feed was just and option from Clausing could be ordered on either model .

Bob G
This is correct.

"Billy G"
 

Rbeckett

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#10
Duh,
Sorry guys, I had a Homer Simpson moment. Youre right, I don't know why I thought that...

Bob
 

Pacer

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#11
Back to th OPs question whether the CDCO (and many others) will fit onto the Clausing - the simple answer is ... no, but... one can be adapted relatively easy. As with many of the old machines the Clausing 8520 was cloned by the Chinese and is generically called the 6x26 (with R-8 spindle:))) mill with several offerings of it (Grizz, WT, etc)

Some 10 yrs ago I had the WT version of it and adapted one of the Chinese PFs to it, scrounged up a couple old pics of when I did the install (I had a bunch more but can only find these. I remember just starting to mess around with some trial methods digging in the scrap box and pretty quickly had it mounted. Course this was back when I bought the PF for something like $175 instead of the $300 or so now...

6x26 column spacer-019.JPG 6x26 column spacer-018.JPG 6x26 column spacer-016.JPG 6x26 column spacer-015.JPG
 
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woodchucker

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#12
Based on Pacer's comment above, has anyone replaced a clausing quill with a Chineese R8 quill? Are they compatible?
 

Doubleeboy

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#13
11 years ago when I sold my 8520 you could still get a Servo brand power feed that was made for 8520. The price was very high, I believe they have since quit selling them. I gave up on my stock Clausing power feed, it would work half decent then not work, too many broken endmills were the results. I ended up hand feeding. I believe the Clausing PF had design issues and have spoken to only a couple folks who were happy with theirs.
 

woodchucker

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#14
11 years ago when I sold my 8520 you could still get a Servo brand power feed that was made for 8520. The price was very high, I believe they have since quit selling them. I gave up on my stock Clausing power feed, it would work half decent then not work, too many broken endmills were the results. I ended up hand feeding. I believe the Clausing PF had design issues and have spoken to only a couple folks who were happy with theirs.
Thanks, I had seen that one of the sites about the 8520. I might try a cobbling something together. What did you wind up with after the 8520?
 

Doubleeboy

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#15
Thanks, I had seen that one of the sites about the 8520. I might try a cobbling something together. What did you wind up with after the 8520?
When I decided I wanted something stiffer and bigger than the 8520 I bought a Jet JTM-1 9 x 42" 2 hp step pulley mill. It was a steal at the time $4000, plus a grand for a Newall DRO. Years later I am still happy with it. Sadly the Jet stuff has gotten considerably more expensive since then. I have seen some incredible work done on 8520s and don't mean to denigrate them but they are not in same league with a Bridgeport size machine in terms of rigidity. Which is kind of comical because being a nodding head machine Bridgeport type machines are far from rigid, but its all relative and mass usually means more stiffness and less flex and the Jet certainly is a world different than the Clausing. Ya Dance with the Girl ya brought, if a HF mini lathe is what you have you deal with its limitations and do the best you can, likewise with a Bed Mill or what have you, its all trade offs. If I have to move to town and live in an apartment, I will swap out all my big toys go sherline or Taig or what have you. Making chips with a smile on your face is what its about.
 

woodchucker

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#16
When I decided I wanted something stiffer and bigger than the 8520 I bought a Jet JTM-1 9 x 42" 2 hp step pulley mill. It was a steal at the time $4000, plus a grand for a Newall DRO. Years later I am still happy with it. Sadly the Jet stuff has gotten considerably more expensive since then. I have seen some incredible work done on 8520s and don't mean to denigrate them but they are not in same league with a Bridgeport size machine in terms of rigidity. Which is kind of comical because being a nodding head machine Bridgeport type machines are far from rigid, but its all relative and mass usually means more stiffness and less flex and the Jet certainly is a world different than the Clausing. Ya Dance with the Girl ya brought, if a HF mini lathe is what you have you deal with its limitations and do the best you can, likewise with a Bed Mill or what have you, its all trade offs. If I have to move to town and live in an apartment, I will swap out all my big toys go sherline or Taig or what have you. Making chips with a smile on your face is what its about.
Yep, understood. For years I made due with a milling attachment on the lathe. It sucked. I had to really tighten the gib screws and do everything possible to get more rigidity out of it. I got what I got for ease of getting it into the basement and it has a knee, which the rong fu's don't. So I figure it would be easier to machine with. I just found out how stout the Rong Fu's are though as they guy had one there. They seem to be quite big for a bench top unit. I will try to make the 8520 a little more use friendly with DRO's and a power feed. I think it's important for surface quality to have that power feed. So I may try to do as above, and get it done.
 

Finster

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#17
I was under the impression that the 8520 screw needed to be keyed and/or a bushing needed to be installed in order to make a aftermarket PF work? I would love to have a PF on my 8520 in the future.
 

Mrcushman

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#18
I adapted this power feed to my Clausing 8520 and also to my Millrite MVN without much work. If anyone is interested in more detail let me know. I did not modify anything on the mill. I made an extension to the shaft and drilled and tapped the end to screw on where the previous acorn nut was and the power feed gear crosses the joint which makes it work in both directions without unscrewing the joint.

2FAE017F-F724-487A-B4B0-C29C2233B54C.jpeg
 

calstar

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#19
If you have any close up pics of the modification I'd really like to see them.

thanks, Brian
 

Mrcushman

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#20
I need to take mine off as I plan to sell the 8520 when I get my Millrite home and sure it works. I can photo the parts then.
 

Mrcushman

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#22
I took mine off and took pictures of the parts but I can not up load them because the server says they are too big. I could email them but I don’t know how to get your email address.
 
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