Author Topic: Slitting Saw arbor  (Read 4252 times)

Offline Joco

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Slitting Saw arbor
« on: January 06, 2018, 01:52:24 AM »
Finally I have finished off the slitting saw arbor I have been making.  This is designed to hold saws with a 16mm mounting hole.
Some points of interest, well perhaps of interest.  :-)
- All material is 1215 free cutting steel using 25mm, 12mm and 6mm sized round bar as source material
- Threads are M10x1 with external threads cut single-point on lathe and internals done with a tap
- Arbor fits a 20mm ER collet ( I'm using ER32)
- The pins on the locking key are salvaged from a printer and are 3mm diameter
- The locking key is made of three parts with the head and shaft M10x1 threaded and secured with loctite

I think that's probably the main items.  On to the long list of pics  :-D

A render from the CAD model.


Starting to shape out the arbor, reasonably pleased with the finish from the Diamond tool holder and its crobolt bit


The hole for the shoulder screw is drilled and bored out as accurately as I can managed it. Test fits and checks with telecopic guages show its within within 0.02 of 16mm.


You can see from this that I have rechucked the part after turning. Since my 3 jaw is mounted to 3 bolt secured registered plate (like many smaller lathes) I lossened the bolts a little and using a DTI and some careful tapping got the runout of the rechucked part down to ~0.02mm.  I used the machined area past the chamfer transition as the register point as it will be concentric with the arbour since it was turned at the same time.


The arbour and retaining shoulder screw done as far as the basic turning is concerned.  Still need to drill holes for the pin key/wrench.








Next is the locking key/wrench.  I debated with myself quite a bit on this. Initial plan was to do a wrench/spanner style model like what you see with the pin wrench that comes with an angle grinder.  However the more I thought about that idea an the potential for slipping with your hand in line with the edge of a slitting saw blade the less I liked it.  So I ended up going with the key that comes in end on.  The next series of photos will show what I mean.
The shaft and the pins for the locking key.


The shaft and head secured togther.  I dont have any pics of the head being turned.  But nothing special. 25mm round, turned to 24mm, angle on compound set to 23 degs and used to turn the taper. Then the thread for shaft drilled and tapped.


The pins setting in the head.  Using the shoulder screw from the arbor to keep things aligned while the inital setting period (20 mins) passes.


The grand finale picture.  The arbor with a saw in it and the locking key all finished.


Hopefully of interest to some people.

Cheers,
James.
James
Wellington - NZ

Offline Steamer5

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Re: Slitting Saw arbor
« Reply #1 on: January 06, 2018, 02:23:15 AM »
Nice work James!

Cheers Kerrin
Get excited and make something!

Offline b.lindsey

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Re: Slitting Saw arbor
« Reply #2 on: January 06, 2018, 02:34:48 PM »
Very nice finish on all of the parts too James. Any thoughts as to a flat pin wrench so as to tighten/loosen the cap while it is mounted in the mill or does the shown wrench suffice? Just thinking about the additional headroom required for the one shown.

Bill

Offline Joco

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Re: Slitting Saw arbor
« Reply #3 on: January 06, 2018, 07:58:50 PM »
Bill - I’m working on a flat wrench in case there is a need to tighten the saw when installed in the mill and to not have to compromise an existing Z position.  Trying to do this addition in the same design style as the first one.  So stay tuned.   :popcorn:
James
Wellington - NZ

Offline Joco

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Re: Slitting Saw arbor
« Reply #4 on: January 07, 2018, 05:59:46 AM »
Here is the "flat" pin wrench to go with the arbor.  I tried to keep a similar style to the key style wrench. I'm not too good at this style thing so hopefully this isn't too far off the mark.

Key elements:
- source material is 25mm and 8mm round bar, 1215 steel
- M6 thread on the handle for a total length (including threading "gutter") of 8mm, into a 15mm deep hole into the head which is 8mm tapped M6 and 6mm at 8mm, leaving a little air to ensure the hanlde seats into the 8mm hole really solidly.
- 3mm pins from the same source as the previous wrench
- everything loctite together with the high strength varity that requies you heat to 230C+ before it will release








Cheers,
James.
James
Wellington - NZ

Online 10KPete

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Re: Slitting Saw arbor
« Reply #5 on: January 07, 2018, 06:42:42 AM »
I'd say you hit your target, James! If that won't do it then nothin' will.
 :ThumbsUp: :ThumbsUp:
Pete
Craftsman, Tinkerer, Curious Person.
Retired, finally!
SB 10K lathe, Benchmaster mill. And stuff.

Offline b.lindsey

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Re: Slitting Saw arbor
« Reply #6 on: January 07, 2018, 12:25:19 PM »
That looks great James! Very nice tool holder all the way around  :ThumbsUp:

Bill

Offline gerritv

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Re: Slitting Saw arbor
« Reply #7 on: January 07, 2018, 01:40:52 PM »
That is a great implementation.

I made one similar after seeing the design on Stefan Gotteswinter's YouTube site. The design gives great grip.

Gerrit
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Offline Joco

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Re: Slitting Saw arbor
« Reply #8 on: February 01, 2018, 08:35:23 AM »
Well proof in the pudding ...  first cut of the mill.  I used the flat style wrench to tighten things up fully once in the saw and to unlock it all once cutting was done.  Things worked rather well.

This is a 50mm diam tube of aliuminium with a 6mm wall.  The slitting saw is HSS, 1mm thick, 72 teeth and about 63mm diameter.






James
Wellington - NZ

Offline gerritv

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Re: Slitting Saw arbor
« Reply #9 on: February 01, 2018, 12:07:04 PM »
A beautiful implementation.
Don't confuse activity with progress

Offline b.lindsey

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Re: Slitting Saw arbor
« Reply #10 on: February 01, 2018, 03:18:40 PM »
That worked well James. So what will you do with the two halves of that large tube now?

Bill

Offline Joco

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Re: Slitting Saw arbor
« Reply #11 on: February 05, 2018, 07:56:00 AM »
Bill - what will the halves become?  The recess of a coolant fluid guage.  This is the WIP on the coolant tank I am making for the lathe. Obviously it needs a heap of cleaning so bear with.  :-)
Once done I'll look to use similar concepts to make tank for a mates bandsaw.  I'll be doing more complete pics on another thread but thought I would show what I had given the question.







James
Wellington - NZ

Offline Steamer5

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Re: Slitting Saw arbor
« Reply #12 on: February 05, 2018, 08:09:49 AM »
Hi James,
 Gold platting the tank.......NICE!!

Cheers Kerrin
Get excited and make something!

Offline Joco

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Re: Slitting Saw arbor
« Reply #13 on: February 05, 2018, 07:22:04 PM »
Hi James,
 Gold platting the tank.......NICE!!

Cheers Kerrin

Got to have some bling.   :Jester:
James
Wellington - NZ

Offline b.lindsey

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Re: Slitting Saw arbor
« Reply #14 on: February 05, 2018, 08:02:43 PM »
Thanks James. Certainly makes sense now :)

Bill

Offline Meldonmech

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Re: Slitting Saw arbor
« Reply #15 on: February 07, 2018, 05:03:43 PM »

 Hi James

                            Nice job, well done.

                                                        Cheers David

 

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