Clarkson Mark 1 Tool and Cutter Grinder - Data and Tooling






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Index :


1. My Mark 1 Tooling


Other Mark 1 and Mark 2 Tooling

2. Universal Head
3. Centres and Centre Brackets
4. Tooth Rests and Brackets
5. Extension Spindle
6. Holders and Bushes
7. Electrical
8. Table
9. Table End Cover
10. Lead Screw
11. Stand
12. Spindle
13. Spindle Nut
14. Elevating Nut
15. Miscellaneous, sets of accessories, etc



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[1] MY MARK 1 TOOLING


I was lucky enough to buy the Clarkson in a University sale.
It is in excellent condition, with paperwork, and some bits of tooling.

The original booklet showed the price they paid as 150 pounds, or '300 pounds with bits'.
I think this is a 1965 machine, serial number 9866.
There is something wrong with the 3 phase motor windings, so I have installed a new single phase motor.
I'm short of space, so I have stored the large pedestal and have bench mounted the business end.


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↓ As soon as I got it home I made a box for most of the bits.
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↓ Here is virtually everything. Now I'm just showing off.
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↓ [91127] Universal Head and bracket.
The bore in the Head is 1.5" ID to accept the holders and mandrels.

Click here to view drawings of the Universal Head and Bracket

 

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↓ Holders.
These holders fit directly in the Universal Head.
[?] 1-1/2" OD, 5/8" ID all the way through
[92606] 1-1/2" OD, 1" ID all the way all through
[92628] 1-1/2" OD, 1-1/4" ID all the way through
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↓ Holders.
These holders fit directly in the Universal Head.
1-1/2" OD, 5C taper (Uni made)
1-1/2" OD, 1-1/4" ID stopped
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↓ Locking collars to fit the holders.
These collars secure the holders in the Universal Head and allow the holders to freely rotate in the Head.
5/8" ID
1-1/4" ID
1-1/2" ID
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↓ Parallel Tool Holders.
These solid tool holders are used with the 5/8" and 1-1/4" ID holders, which in turn fit in the Universal Head.
The grub screws secure the work in the short bores.
5/8" OD, 1/4" ID for depth of 2-1/2"
1-1/4" OD, 1/2" ID for depth of 2-1/2"
1-1/4" OD, 3/4" ID for depth of 2-1/2"
1-1/4" OD, 1" ID for depth of 2-1/2"
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↓ Taper Tool Holders.
These taper tool holders fit directly in the Universal Head.
These are not the genuine Clarkson morse sockets.
I took a chance and bought these blind off ebay. There is a bit of battering on them, but they fit the Head perfectly.
[similar to 92603] 1-1/2" OD, MT1 taper
[similar to 92604] 1-1/2" OD, MT2 taper
[similar to 92605] 1-1/2" OD, MT3 taper
[similar to 93548] 1-1/2" OD, MT4 taper
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↓ Adapter bushes
The adapters fit in the 1" ID holder, and enable that holder to hold smaller work.
[92607] 1" OD 3/4" ID missing
[92608] 1" OD 5/8" ID missing
[92609] 1" OD 1/2" ID missing
[92610] 1" OD 3/8" ID
[92611] 1" OD 1/4" ID
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↓ [91103] Toothrest bracket - for spiral work.
This piece has gone rusty again.
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↓ [91102] Toothrest bracket - for general work.
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↓ Toothrests.
The toothrest holder on the right fits in the swan-necked bracket.
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↓ [91104] Two Centre Brackets and Centres.
5/8" ID, 3-3/16" centre height
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↓ [91120] Adapter and bush for side and face cutters.
This adapter will hold 1" cutters.
The 1/2" Whitworth securing bolt, 1-1/4" bush and washer are missing
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↓ Dedlock grinding mandrels.
I am not too sure I have the numbers right for these. This is my best guess.
[47073] Mandrel for 200 cutters (the one with the cross drilled hole in the shaft).
[32110] Mandrel for 150 cutters.
1" parallel shank
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↓ Grinding wheels and flanges.
[93575] Support washers 2 off
[92612] 1 plain grinding wheel
[92613] 1 cup grinding wheel
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↓ Extractor hood.

A note from the March Engineering Operators Manual:
"If you use Dry Grinding Machines for 12 hours per week or more you must supply some means of dust extraction.
You may either link your March Tool & Cutter Grinding Machine to your existing system or use a separate March Dust Extraction Unit which can be purchased as an optional extra. If, however, you do not require dust extraction facilities you must blank off the guard outlet with 1/8" minimum thickness of plate."
The law requires you to guard as much of the wheel as practically possible.

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↓ Misc home and Uni made.
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[2] UNIVERSAL HEAD



↓ (08-12-14) This Universal Head sold 56 pounds on ebay, located in Stoke.
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↓ (06-11-14) This Universal Head, Bracket, and Centre sold for 155 pounds on ebay, located in Taunton.
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↓ (24-10-14) This Universal Head sold for 104 pounds on ebay, located in Milton Keynes.
The head has a slit cut through it, together with a locking lever. The locking lever (when tightened) closes the slit, and clamps the sleeve to prevent movement.
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↓ (13-07-14) This Universal Head, Bracket, and Bushes, was for sale on ebay, located in London.
It was described as:-
''bracket is new
collet sizes : imperial 1\4'' 3\8" 1\2" 5/8'' metric 6mm 10mm 12mm 16mm
please be aware this bracket is a precision made replica which is excellent for grinding all cutters''
The bracket is a replacement and usually has a raised boss underneath the nut that secures it to the table.
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↓ (20-05-13) This Universal Head was for sale on ebay, located in Lichfield.
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↓ (01-04-13) This Universal Head sold on ebay for 120 pounds, located in Hemel Hempstead.
The tooth rest bracket looks homemade. There is no Universal Head Bracket.
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↓ (16-10-12) This tooling sold for 120 pounds on ebay, located in Stoke on Trent
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↓ (24-09-12) These holders and Universal Head sold for 122 pounds on ebay, located in Ravenshead, Nottingham.
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↓ (13-09-12) This set sold for 350 pounds on ebay, located in Nottingham.
The Bracket for the Universal Head is home made. It looks like it is made out of a piece of steel U-section or maybe an RSJ.
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↓ (04-08-12) This Universal Head with Tooth Rest Bracket sold on ebay for 112 pounds, located in Worcester.
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↓ (20-05-12) This Universal Head and Tooth Rest sold on Ebay for 123 pounds.
There is a Gewefa ER32 Collet Chuck mounted in the sleeve.
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↓ (12-02-12) This Universal Head and Sleeve sold on ebay for 56 pounds, located in Worcester.
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↓ 15-02-11 This Bracket for the Universal Head sold on ebay for 14 pounds.
The round degree dial that fits in the slot is missing.
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↓ 19-12-10 This Universal Head sold for 62 pounds on ebay.
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↓ This brand new Universal Head was up for sale from Jubilee machine Tools.
Going by the paint colour I think this is made by March Engineering and is maybe a Mark 2 item (although it could very well have been supplied with their Mark 1 machines).
I guess the serrated collar can be used to index the workhead.
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[3] CENTRE BRACKETS AND CENTRES



↓ (25-04-16) These Centre Brackets sold for 63 pounds on bay, located in Newcastle Upon Tyne.
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↓ (23-04-16) These Centre Brackets were for sale on bay, buy it now 85 pounds, located in Romford.
Note the straight edges. They appear to be copies.
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↓ (23-08-15) These Centre Brackets were for sale on ebay, located in Newport.
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↓ (03-12-14) These Centre Brackets sold for 72 pounds on ebay, located in Romford.
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↓ (26-11-14) These Centre Brackets were for sale on ebay, located in Huntingdon.
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↓ (24-10-14) These Centre Brackets sold for 92 pounds on ebay, located in Milton Keynes.
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↓ (02-09-14) These Centre Brackets sold for 36 pounds on ebay, located in Atherton.
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↓ (05-07-14) These Centre Brackets were for sale on ebay, located in London.
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↓ (18-04-14) These Centre Brackets sold on ebay for 45 pounds, located in Stoke.
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↓ (27-08-13) These Centre Brackets were for sale on ebay, located in Newport.
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↓ (08-07-13) These Centre Brackets were for sale on ebay, located in Wickford.
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↓ (11-02-13) These Centre Brackets were for sale for 100 pounds on the homeworkshop.org website, located in Telford.
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↓ (27-01-13) This Centre Bracket was for sale on ebay, located in Market Raisen.
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↓ (19-11-12) These Centre Brackets were for sale on ebay with an asking price of 99 pounds, located in Tamworth.
They were described as refurbished. They did not sell.
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↓ (19-11-12) These Raising Blocks came up for sale on ebay, located in St Albans.
The Raising Blocks increase the centre height of the Centres.
They were described as:
Clarkson Mk1 Tool and Cutter Grinder Centre Raising Blocks.
Two pairs of Raising Blocks to increase centre height for sharpening large S & F cutters.
One pair at 1 inch
One pair at 2 1/4 inch
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↓ (19-11-12) This single Centre Bracket sold on ebay for 6 pounds, located in St Albans.
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↓ (17-11-12) This single Centre Bracket sold on ebay for 22 pounds, located in West Midlands.
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↓ (16-10-12) This tooling was up for sale on ebay, located in Stoke on Trent
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↓ (04-08-12) These Centre Brackets sold on ebay for 92 pounds, located in Worcester.
The Centre on the right is not original.
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↓ (20-05-12) These Centres sold on Ebay for 118 pounds.
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↓ (13-04-12) These castings sold on ebay for 34 pounds, located in Burton-on-Trent.
These are a non standard set of castings.
A pair of unused castings from patterns copied from the Union Cutter Grinder dead centres.
These castings could easily be machined to suit a Clarkson cutter grinder.
These are of good quality cast iron, cast by a professional foundry, and have been fettled ready for machining.
They have sufficient stock to allow for the base tenons to be machined.
The two castings combined weigh 2.8 kg before packing.
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↓ (07-10-11) These accessories sold for 87 pounds on ebay, located in Swadlincote.
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↓ (19-12-10) This center bracket sold for 32 pounds on ebay.
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[4] TOOTH REST BRACKETS AND FINGERS



↓ (25-04-16) This rest was for sale on bay, located in Newcastle Upon Tyne.
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↓ (16-10-12) This tooling was up for sale on ebay, located in Stoke on Trent
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↓ (04-08-12) This Universal Head with Tooth Rest Bracket sold on ebay for 112 pounds, located in Worcester.
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↓ (20-05-12) This Tooth Rest sold on Ebay for 56 pounds.
This looks like the Tooth Rest Bracket for Spiral Cutters 91103.
The shaft has been made offset.
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↓ (07-10-11) These accessories sold for 87 pounds on ebay, located in Swadlincote.
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↓ 19-12-10 These finger brackets sold for 33 pounds on ebay.
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[5] EXTENSION SPINDLE



↓ Here are some Spindle Extension dimensions to make an exact copy of the original (to be completed).

UPDATE .. the dimensions in the plans and drawings section maybe more reliable than those here.
I will revise this section once I know the correct dimensions (which should be soon).

The body is 1.5 inch/38mm diameter.
The body is 3.75inch/95mm long.
Many thanks to Mr Panayi for providing the above dimensions.

I have read elsewhere that the body is 2.5inch/63.5mm long.
Maybe the above 95mm dimension is really 2.5inch\63mm for the body plus 32mm for the spindle, making an overall length of 3.75inch\95mm) ?
I would say the diameter of the Spindle Extension is definitely 38mm, to match the diameter of the machine spindle flange.

The spindle portion is the same as the machine spindle i.e. is 32mm long overall, has a 22mm long 1/2inch BSF threaded portion, and a 10mm plain portion.
I will confirm these dimensions once I see an original Spindle Extension (anyone?)

It looks easy enough to make a Spindle Extension that will work and it does not need to be exactly like the original.

Here are the dimensions needed in order make an exact copy of the original Spindle Extension:

1. Diameter of the body (1.5 inch/38mm)
2. Length of the body (3.75inch/95mm or 2.5inch/63.5mm)
3. Width across the spanner flats (?)
4. Width of the spanner slot (?)
5. Distance of spanner slot edge from the end of body that has the internal thread (?)
6. The internal and external threads are 1/2inch BSF Left Hand

If you have an original part I would be more that interested to know the correct dimensions (Steve microstoc@hotmail.com).

 

↓ I have not got the Spindle Extension.
This is Pani Panayi's homemade Spindle Extension.
This Spindle Extension was up for sale at http://www.homeworkshop.org.uk
The internal and external threads are 1/2 inch BSF Left Hand.
The body is 60mm long.
The spindle is 43mm long.
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↓ This is a photo of two Spindle Extensions (not mine).
I don't know if these are genuine Clarkson or not.
The internal and external threads are 1/2 inch BSF Left Hand.
Spindle 1 - the body is 70mm long, the spindle is 43mm long.
Spindle 2 - the body is 50mm long, the spindle is 34mm long.
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↓ (22-11-14) This Spindle Extension was for sale on ebay for 50 pounds (buy it now), located in Upminster.
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↓ (18-06-12) This Spindle Extension was for sale on ebay, located in Chelmsford.
It does not look like a genuine Clarkson accessory.
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↓ (22-04-12) This Spindle Extension sold for 38 pounds on ebay, located in Brighouse.
This is the later type that requires a C spanner. The earlier types have flats for a Whitworth spanner.
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[6] HOLDERS AND BUSHES



↓ (28-04-15) These bushes were for sale for 65 pounds on ebay, located in Aldershot.
The sizes are 6mm, 8mm, 10mm, 12mm, 16mm, 20mm.
The outside diameter is 1 inch.

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↓ (24-09-12) These holders and Universal Head sold for 122 pounds on ebay, located in Ravenshead, Nottingham.
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↓ (13-09-12) This set sold for 350 pounds on ebay, located in Nottingham.
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↓ (08-01-12) These bushes sold for 27 pounds on ebay, located in North Finchley, London.
The 3 bushes on the right are genuine clarkson fully ground and hardened. The sizes are 6mm, 10mm, and 16mm.
The 2 bushes on the left are not genuine but are well made. The sizes are 1/2" and 16mm.
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[7] ELECTRICAL



↓ (26-01-15) This motor was for sale on ebay, buy it now 75 pounds, located in Upminster.

 

This is a 3 phase motor off a Mark 2 machine.

 

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↓ (20-03-13) This 3 phase starter switch sold for 11 pounds on ebay, located in Newick.
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↓ (20-03-13) This 3 phase motor sold for 16 pounds on ebay, located in Newick.
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↓ (08-03-13) A motor removed from a Clarkson 3 phase 2870rpm.
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[8] TABLE



↓ (24-03-14) This upper table was for sale on ebay, located in Verwood.

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↓ (31-01-14) This Mark2 table was for sale on ebay, located in Bacup.
It was described as :-
hi all well this is a special compound table of a Mark 11 clarcson grinder it is on ball bearings and not the old V SLIDES that my table has and the action is so smooth compaird to the V slide table it would have really improved my grinder
i bought this to replace the old table on my own clarkson grinder but i have had a lot done to my own grinder and to fit it i would lose all the graduations that are on my table base and cross slide hand wheel and i do not whis to do that so i must sell this on
the brown stains on the slide ways is only grease and by the way the table comes as part of a complete machine but its stored in bits in my home workshop and i now need the space for other machine
there is a cast stand with built in cupboard
but sorry no tooling or motor

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↓ (16-04-13) This swivel table sold for 31 pounds on ebay, located in Storrington.
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↓ (17-11-12) This swivel table sold for 25 pounds on ebay, located in West Midlands.
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[9] TABLE END COVER



↓ (14-09-14) This Table End Cover sold on ebay for 99 pennies, located in Solihull.

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[10] LEAD SCREW



↓ (20-01-14) This lead screw nut was for sale on ebay, located in Ashby De La Zouch.
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[11] STAND



↓ (16-08-15) This stand sold for 22 pounds on ebay, located in Loncoln.
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[12] SPINDLE



↓ (23-04-15) This Spindle Housing sold for 32 pounds on ebay, located in Barnard Castle.

Serial Number = 8587

 

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↓ (09-06-14) This Mark 2 spindle was for sale on ebay, located in Ashby de la Zouche.
It was described as:-
''A new and unused wheel head spindle for the Clarkson/March MKII tool and cutter grinder. Still in the protective dip except for the wheel nut end which was used just to check a matching spindle nut. Fits all MKII machines but will not fit MKIs or MKIIIs.''

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[13] SPINDLE NUT



↓ (05-01-15) This Spindle Nut was for sale for 8 pounds on ebay, located in Brighouse.

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[14] ELEVATING NUT



↓ (09-06-14) This Mark 2 elevating nut was for sale on ebay, located in Ashby de la Zouche.

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[15] SETS OF TOOLING ETC



↓ This set of accessories was for sale for 185 pounds.
The set contains ...
... assortment of sleeves for the workhead, and adapter bushes.
... regrind mandrel for deadlock 200 cutters.
... regrind mandrel (miniature) for deadlock cutters.
... spanner, allen keys, missing spanners.
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↓ A set of accessories included in a machine sale.
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↓ (22-03-16) This set of accessories was for sale on ebay, located in Upminster.
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↓ (07-02-16) This set of accessories sold for 105 pounds on ebay, located in Leicester.
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↓ (13-01-16) This set of accessories was for sale on ebay, located in Caterham.
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↓ (20-11-15) This set of accessories sold on ebay for 143 pounds, located in Aylesbury.
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↓ (04-05-15) This set of accessories sold for 135 pounds on ebay, located in Nottingham.
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↓ (13-04-14) These accessories were for sale on the Quillstar website.
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↓ (13-09-12) This set sold for 350 pounds on ebay, located in Nottingham.
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