Author Topic: Worden MK 3 tool and cutter grinder  (Read 72247 times)

Offline vcutajar

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Worden MK 3 tool and cutter grinder
« on: November 17, 2015, 09:03:03 PM »
If you can't see the photos of this build suggest you go here:
https://modelengineeringwebsite.com/Worden_1.html


Well, here I am; again.

I am starting a new project, and from the title of this build it is obvious that it is not going to be an engine.  I have been thinking of making this tool for a while as my results in free hand grinding of lathe tools is, to say the least, atrocious.  Taking an advantage of a lull in my Corliss build, I ordered the kit last week from Hemingways. It arrived yesterday in less than a week.



Box was not damaged and when I tried to pick it up from the floor I was surprised how heavy it was. No wonder the delivery person did not look too happy. It weighs about 25kg!!  Managed to get the box to the garage and opened the box to see what's inside.  Everything inside was neatly packed.



There were two carton boxes, one containing the electric motor and the other one the rest of the electrical hardware and two bags of metric nuts and bolts.  All the bar stock and the steel prefabricated frames were neatly bubble wrapped.  There was also some paperwork included which consisted of
  • 10 A3 sheets of technical drawings
  • A set of construction notes
  • A set of notes of how to use the finished tool.



I know that there was a write-up on the Model Engineers Workshop but I just could not find it or I do not have that particular issue but I managed to find on the internet another build write-up (http://www.jeffree.co.uk/Pages/worden/worden.htm) which I intend to use in conjunction with Hemingways construction notes.

I then opened the box for the electric motor to have a look at it, and that's when my heart sank.  Motor is damaged!! On closer inspection it was determined that both motor mounts were broken.



The good thing is that both mounts can be easily replaced.  So at 05:00pm I sent an email with the photo to Kirk at Hemingways.  At 10:00pm received an email from Kirk saying that he will send me two new mounts.  Thumbs up to Kirk.

Vince
« Last Edit: March 04, 2021, 05:25:52 PM by vcutajar »

Online Jo

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Re: Worden MK 3 tool and cutter grinder
« Reply #1 on: November 17, 2015, 09:11:00 PM »
 :o I had a broken foot with a motor I purchased  >:( Luckily the supplier had a stock of spare feet it seem this happens all too often

Looking forward to seeing your build Vince. It is really nice having a cutter grinder at home  ;D

Jo
Enjoyment is more important than achievement.

Offline vcutajar

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Re: Worden MK 3 tool and cutter grinder
« Reply #2 on: November 17, 2015, 09:14:23 PM »
Jo, I got the same impression from Kirk's reply. It seems these motors don't travel well.

Vince

Online Jo

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Re: Worden MK 3 tool and cutter grinder
« Reply #3 on: November 17, 2015, 09:23:30 PM »
I just found a couple of nice pictures of one of these cutter grinders:





Martin who built it thinks it is the best thing he ever built  ;)

Jo
Enjoyment is more important than achievement.

Offline b.lindsey

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Re: Worden MK 3 tool and cutter grinder
« Reply #4 on: November 17, 2015, 11:49:17 PM »
Looks like a great project Vince. Sorry about the motor feet but it sounds as if their customer services has that sorted out already. Will be looking forward to your progress on this.

Bill

Offline Don1966

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Re: Worden MK 3 tool and cutter grinder
« Reply #5 on: November 18, 2015, 12:31:42 AM »
Awesome Vince and it looks like a great project. I had look at it on there site but ended up buying one from Northern tools. This is the link to the grinder...http://www.northerntool.com/shop/tools/product_200414732_200414732
I will be following you as you progress and should be an interesting project. By the way I have had good results dealing with Kirk at Hemingway and I did build quiet a few of there kits.

Don

Offline vcutajar

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Re: Worden MK 3 tool and cutter grinder
« Reply #6 on: November 18, 2015, 05:30:12 PM »
Thanks guys for looking in and keeping an eye out on me.  I read somewhere that this kit can be done in three weekends.  Something tells me this is not going to happen especially if I do things the hard way.

So, work started on the kit.  It is recommended to debur all the pre-fabricated steel plates.  Yes, they need it but I did not want to do them all at the same time. It was decided to only debur the part that I would be working on.  Started on the base as recommended.  Deburred that to remove all the rough and sharp surfaces.  The base has three 8mm captive nuts in it.  Tried to screw a bolt in them but no luck. So, all captive nuts were refreshed with an 8mm tap.  Much better now.  I guess the start threads were deformed a little when the nuts were pressed in.



Next operation was to fit the two stiffener bars between the top and bottom of the base.  The bars provided were nearly exactly to size. Less than a mm longer than required.  I could have easily left them like that but being me I wanted them exactly to size.  So I lightly milled one side of the bar.  This also removed the saw marks.



A trial fit was attempted but the stiffener bar would not slide easily between the top and bottom of the base.  Two temporary jacks were devised to push the top and bottom apart so that the bar would easily slide in.



Next to mark, drill and tap the bars.  Here I did not follow the instructions as I thought that I would not be able to mark the holes properly and also I could not be certain that when I drill the bars that the 5mm drill will not wander.  So instead, I measured the locations of the pressed holes in the base from the front.  The measurements seemed to be in mm.  Just to confirm that my measurements were correct I asked Kirk if he had a drawing of the base with the locations of the pressed holes which he immediately obliged by sending me a drawing.  As I thought, the dimensions of the drawing were in mm and I had measured correctly.  The holes were marked on the bar and proceeded to start drilling.  I only drilled half way through.



Bar was flipped around and was drilled from the other side.  Next operation was to tap 6mm each hole, first from one side and then from the other.  Trial fit and all the holes lined up and the stiffener bar bolted up.



Next to do the other one using the same method.

As an afterthought, it would have been easier to drill 6mm clearance holes and use a long bolt and nut instead of tapping.  Unless I am missing something!

Vince

Offline Dave Otto

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Re: Worden MK 3 tool and cutter grinder
« Reply #7 on: November 18, 2015, 11:40:37 PM »
Interesting project Vince,

The table is very similar to my Glendo low speed diamond sharpener; The Glendo just has a single bar on a pivot and not the fancy adjustable tool holder. I will be curious to see how it is made and put to use. I may want in design and build something like this for my machine.

Dave

Offline Bjorn_B

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Re: Worden MK 3 tool and cutter grinder
« Reply #8 on: November 20, 2015, 09:05:51 PM »
Interesting, had a long thinking session (and a few pints of ale) on deciding if to get this one for lathe tools. I have a quorn and it is a bit of a hassle.. I'm aming for something like what only is briefly mentioned in GHT's workshop manual and read somehwhere that the worden is loosely based on those ideas. Big thumbs up for posting this!

Offline Martin Cottrell

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Re: Worden MK 3 tool and cutter grinder
« Reply #9 on: November 21, 2015, 04:59:09 PM »
Thanks for the kind comment on the photos of my Worden that you posted Jo!

Vince, it's a great tool and so quick to get up and running for grinding basic lathe tools etc. I've also got the accessory kit for the four facet drill grinding attachment but haven't got around to making it yet. I'm sure you'll be really pleased with yours once you've got it up and running.

Martin.

Offline vcutajar

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Re: Worden MK 3 tool and cutter grinder
« Reply #10 on: November 21, 2015, 05:47:14 PM »
Thanks Dave, Bjorn and Martin for your comments.

Martin, thanks for the photos.  I may be asking you questions about it.  I have a big question mark about the cam discs which tilt the table.  I know that the middle one is fixed in one position because I have to file a flat on the rod for the grub screw.  But what about the other two??  There is no mention of filing flats for their grub screws.  It is really puzzling me.  Maybe when I assemble it, it will make more sense.

I made some more progress on the tool.  Finished the other stiffener bar and fitted in place.



Marked the excess on the unmilled side and milled it to the line.  Also there is a nice space between the stiffeners to put in a drawer.  Oh no not another wooden item.

Fitted three feet to the bottom of the base.  These are just door stops that I bought locally.  They are not part of the kit but it is recommended that they are fitted.



A couple of days ago, the replacement electric motor mounts arrived and I changed them.



As the motor was out of the box, I wired it to test it.  I also cleaned up the motor plinth from the rough edges and gave it a trial fit.



Vince
« Last Edit: March 03, 2021, 05:59:28 PM by vcutajar »

Offline Stuart

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Re: Worden MK 3 tool and cutter grinder
« Reply #11 on: November 21, 2015, 06:05:33 PM »
Fix the middle one then twist the outer ones to contact the table and tighten up the grub screws , that's what I did , but in long term uses the grit in the slider caused me problems  as did a bearing failure on the motor , so I built a Quorn  :hammerbash:

Stuart
My aim is for a accurate part with a good finish

Offline Tjark

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Re: Worden MK 3 tool and cutter grinder
« Reply #12 on: November 21, 2015, 07:27:26 PM »
Vince a nice project you are starting.
Will follow this build, very interesting.
Some years ago I got the complete set off drawings from the Bonelle grinder in metric.
It will take some time before I will build this grinder.
After the KIWI build I have made plans to build the Dion engine.
Have bought the drawings of this engine from Classic-motors  who also sells the casting kits.
But as the KIWI I will try to cast the parts myself.


    Tjark.

Offline vcutajar

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Re: Worden MK 3 tool and cutter grinder
« Reply #13 on: November 21, 2015, 09:18:11 PM »
Thanks Stuart for the explanation. Still have to figure out how to operate this thing when finished.

Tjark, good luck with the Kiwi. Who is going to start it first, yourself or Jo? :popcorn:

Vince

Offline Tjark

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Re: Worden MK 3 tool and cutter grinder
« Reply #14 on: November 21, 2015, 10:01:08 PM »
Vince, i do not know at the moment.
Was not satisfied with the head castings.
It looks that the first one’s  had shrinking tears so they would leak.
Had those troubles some time’s back when I casted heads for racing engines.
So I casted today two new ones and they look very good.
All the other parts are ready and I bought in China some black m4 hex flange nuts.
This for the head and cylinder, it looks better on this engine I think.
We will see who is first, Jo had some trouble with the Figiebel engine, but hope she get it running as the Kiwi engine.

       Tjark.

 

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