Clarkson Mark 1/2/3 Attachments






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Here are the attachments for the Mark 1, Mark 2, and Mark 3 machines.

Index :


1. Air Bearing Flute Grinding Attachment - ABFGA
2. Drill Point and Tap Lead Grinding Attachment - DPATLGA
3. Radius Grinding Attachment - RGA
4. Controlled Spiral Grinding Attachment - CSGA
5. Three Way Vice
6. Dust Extraction Unit



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AIR BEARING FLUTE GRINDING ATTACHMENT (ABFGA).

The ABFGA pictures and information has been kindly supplied by Patrick Carlier.
The attachment has been stored unused for quite a number of years. Pat has taken it apart and is in the process of restoring it for a friend.

↓ This is the paperwork that came with the attachment.
It was ordered from March Engineering on 20th February 1991 and sent over to Belgium.
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↓ Here is the body of the ABFGA. It is attached to a non-standard 20mm plate, in order to raise it up on the machine it was used on.
The airbearing itself is mainly a piece of cast aluminium with a precision ground steel bush pressed in, with some holes to allow the air to pass.
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↓ The attachment is rusty due to the storage conditions.
You can see a couple of the air holes in this picture.
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↓ Here is a view of the underside of the body, showing the locating lugs.
The threaded boss for the air inlet is at the top.
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↓ Here is the inner bush.
The bush has been pressed out. The insides were full of rust and debris, which was a shame.
The bush was a light press fit in the holder block, with an Oring at each end to seal the air.
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↓ You can just make out the groove for the Oring.
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↓ Here is the original March Engineering steel box.
There is a "March Engineering" sticker on the box, but it is now faint and hardly visible.
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↓ There are 3 long sleeves and each is capable of holding a different OD size of collet.
The large and small sleeve (top and bottom in this picture) are standard equipment.
The medium sleeve (middle in this picture) is described as optional equipment.
The length of the large sleeve is close to 40cm to give you an idea.
There are 3 Locking Rings. One Locking Ring is the original standard equipment and the other two are of an alternative design.
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↓ Here is a close up of the ends that hold the collets.
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↓ Here is the full set of collets.
The 25,32,38 collets fit the standard equipment large sleeve.
The 20 collet fits the optional equipment medium sleeve.
The 6,10,12,16 collets fit the standard equipment small sleeve.
This set is metric, and it is believed that each sleeve accepts both imperial and metric collets.
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↓ Here is a close up of one of the collets.
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↓ This ABFGA was up for sale by Jubilee Machine Tools for 450 pounds plus vat.
This is Clarkson made and comes in a fitted wooden box. The wooden holders inside the wooden Clarkson box look to be the same as the March wooden holders in the March metal box.
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↓ (24-09-12) This ABFGA was up for sale with a starting price of 450 pounds, located in Coventry.
It was described as:
"In Good Working Order
Complete with full Range of Collets
Imperial:- 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, 1", 1 1/4 & 1 1/2
Meteric:- 6, 8, 10, 12, 16, 22, 25, 32 & 38"
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↓ (01-09-12) This collet was for sale on ebay, located in Finchley.
The collet is for the ABFGA.
It is 1 inch.
The part number is L426 (as per the sellers description)
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DRILL POINT AND TAP LEAD GRINDING ATTACHMENT (DPATLGA).

The DPATLGA pictures and information has been kindly supplied by Patrick Carlier.

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↓ (08-09-15) This DPATLGA as for sale on ebay, but it now 120 pounds, located in Exemouth.
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↓ (12-05-15) This DPATLGA as for sale on ebay, for 275 pounds or offer, located in Taunton.
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↓ (03-11-14) This DPATLGA sold for 536 pounds, located in Amersham.
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↓ (18-02-14) This DPATLGA was up for sale for 990 pounds.
This is refurbished from Machine Spares.
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↓ (24-12-13) This DPATLGA was up for sale for 1800 pounds.
This is brand new from Machine Spares. Nice.
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↓ (08-03-13) This DPATLGA sold on ebay for 620 pounds, located in Lincloln.
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↓ (09-02-11) This DPATLGA sold on ebay for 383 pounds.
The attachment came with a 6 jaw chuck and only the 3 pinned collar.
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↓ (17-02-12) This DPATLGA was for sale on ebay, located in Stoke.
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↓ (14-12-10) Machine Spares were selling a used Drill Point and Tap Lead Grinding attachment for 875 pounds + vat.

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↓ (14-04-12) HomeAndWorkshop.co.uk were selling a Drill Point and Tap Lead Grinding attachment for 1175 pounds + vat.
For drills: 3mm to 16mm, 1/8inch to 5/8inch
For taps: M4 to M25, 4BA to 1inch
Complete with the original box.

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↓ (27-08-12) Surplus Machine Spares were selling a damaged 6 jaw chuck. It went for 11 pounds.
This is a thing of beauty.
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RADIUS GRINDING ATTACHMENT (RGA).

The RGA Serial Numbers on the Mark I attachments are preceeded by R.
The RGA Serial Numbers on the Mark II attachments are preceeded by RT.
On the Mark I models, the pedestal that supports the Universal Head is the fixed type and is not hinged.
On the Mark II models, the pedestal that supports the Universal Head is the hinged type.


↓ (22-04-15) This RGA was for sale on ebay, located in Biggleswade.

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↓ (26-11-14) This RGA sold for 200 pounds, located in Huntingdon.

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↓ (06-10-14) This RGA was for sale on ebay, located in Uplminster.

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↓ (18-04-14) This RGA was for sale on ebay, located in Maldon.

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↓ (13-04-14) This RGA was for sale on ebay, located in Southampton.

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↓ (13-04-14) This RGA was for sale on ebay, located in Sutton Coldfield.

It was described as:-
''This Mark 2 Radius grinding fixture was developed for use with the Clarkson Mark 2 Cutter Grinding Machine.
The Mark2 radius fixture was specificallyy designed to perform the following operations:-
1 - Ball nosing all slot drills including those gashed on the spiral.
2 - Grinding Radii on End Mills.
3 - Forming and regrinding Corner Rounding Cutters.
4 - Grinding Radii on all Side and Face Cutters.
It is in Excellent hardly used condition and is supplied in original wooden case and with original instructions and includes everything you see in the pics apart from the ball nose cutter which was just for demo purposes and is still in everyday use.
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↓ (10-02-14) This RGA was for sale on ebay for 354 pounds, located in Dartford.
Serial Number = RT739
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↓ (07-01-14) This RGA was for sale on ebay, located in Upminster.
The buy it now price was 550 pounds.
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↓ (16-04-13) This RGA was for sale on ebay, located in Wigan.
Serial Number = r513
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↓ (08-03-13) This RGA sold for 122 pounds on ebay, located in Lincoln.
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↓ (16-10-12) This RGA sold on ebay for 160 pounds, located in Kent.
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↓ (13-09-12) This lovely set included an RGA and sold for 350 pounds on ebay, located in Nottingham.
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↓ (13-08-12) This RGA eventually sold for 185 pounds on ebay, located in Stoke.
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↓ (19-12-10) These RGA bits sold on ebay for 22 pounds.
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↓ (14-12-10) This RGA sold on ebay for 139 pounds.
Serial Number = 2064
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↓ (07-11-10) This RGA sold on ebay for 160 pounds.
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↓ (21-12-10) This RGA sold on ebay for 124 pounds.
The pedestal that supports the Universal Head is the fixed type and is not hinged.
Serial Number = 614
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↓ This RGA belongs to Bernard Wright.
Serial Number = 495
When Bernard got the RGA a few of the parts were missing. He has been able to fabricate the missing parts to bring the RGA into use.
I believe he has some detailed CAD drawings that will enable you to build the RGA from scratch.
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↓ Another RGA example.
Serial Number = 393
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↓ This RGA was included in a sale with a Mark 1 machine.
The pedestal that supports the Universal Head is the fixed type and is not hinged.
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↓ (07-12-11) This RGA was for sale by Bw Machine Tools for 420 pounds, located in Leicester.
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↓ (03-04-12) This RGA sold on ebay for 204 pounds, located in Bolton.
Serial Number = 2073
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↓ (17-06-12) This RGA sold on ebay for 185 pounds, located in Chelmsford.
The pedestal that supports the Universal Head is the fixed type and is not hinged.
The Universal Head looks like it is homemade.
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↓ (10-07-12) This RGA sold on ebay, located in Leeds.
This nice set was described as: "Clarkson radius fixture - complete in original wooden case. Also includes some additional pieces.
Serial number R701.
Hardly used and in good working order".
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CONTROLLED SPIRAL GRINDING ATTACHMENT (CSGA).

↓ (10-08-15) This CSGA sold on ebay for 226 pounds, located in Lincoln.

Serial Number = 272

 

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↓ (14-01-13) This CSGA was for sale on ebay with an asking price of 350 pounds, located in Nottingham.

Serial Number = 274

It was described as :-
Used condition, the unit is operational but would benefit from a good overhaul.
The rubber bellows were badly perished so have been removed.
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↓ This CSGA was part of a Mark 2 sale, located in Shiga, Japan.
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↓ This CSGA was up for sale by Jubilee Machine Tools for 450 pounds plus vat.
Serial Number = 98200
Type = C.S.37
This one is for the Mark 3 machine.
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↓ (07-07-12) This CSGA was for sale on ebay, located in Wakefield.
This one is for the Mark 2 machine.
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CLARKSON VICE.

Here is a book picture of the 3 way vice.
Thanks to Patrick Carlier for this picture.
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↓ (10-03-15) This vice was for sale on ebay, buy it now 350 pounds, located in Upminster.

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↓ (24-10-14) This 3 way vice was for sale from Machine Spares, located in Brierly Hill, West Midlands.

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↓ (13-04-14) This 3 way vice base (no vice) sold on ebay for 103 pounds, located in Southampton.

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↓ (01-08-13) This 3 way vice sold on ebay for 511 pounds, located in Sheffield.
I think this is very nice indeed.

It was described as:-
Jaws 7/8 x 2"3/4, maximum opening 1"1/2.
Clarkson 3 way universal vice in home made box.

 

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↓ (17-06-13) This 3 way vice base sold for 104 pounds, located in Longfield.
It was described as a swivel adapter.
The vice with its graduated base is missing.

 

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↓ (15-03-13) This 3 way vice sold for 220 pounds, located in Wolverhampton.

 

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DUST EXTRACTION UNIT

Dust Extraction Unit - Cylindrical :-
Height = 30 inches or 36 inches (requires verification)
Width = 26 inches

Dust Extraction Unit - Square :-
NB: these dimensions are for the model built by March, which looks the same as the original Clarkson Extraction Unit.
Height = 840mm, 33 inches
Width = 455mm, 18 inches
Depth = 505mm, 20 inches
Capacity = 420 m3/h 100mm water gauge
Capacity = 250 c.m. 4 inches water gauge
Hose = 60mm x 2300mm with jubilee clips (is the inlet spigot 60mm outside diameter?).
Electrical = 200/250 volts or 380/440 volts, 3 phase
Weight Nett = 39kg, 105lb
Weight Gross = 47kg, 86lb

 

The March Engineering manual describes the square Dust Extraction Unit as follows:-
''The March Dust Extraction Unit is designed to fit all March Tool and Cutter Grinders, The powerful extractor removes both metal and wheel dust, giving better visibility, a cleaner job and longer life to the Cutter Grinder. Dust is kept clear of adjacent machinery too. The unit ensures safety for the operator against flying particles, and the danger of breathing dust. It is compact - occupying only 2.5 square feet of floor space. It is easily fitted to the Cutter Grinder and can be located in any convenient position. The unit can be supplied with a Cutter Grinder or on its own for connection to an existing machine.''

 

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.

 

↓ Extractor Hood for Mark1 and Mark 2.
The outside diameter of the spigot on the Extractor Hood on my Clarkson Mark 1 is 75mm.
This 75mm spigot will need a reducer to allow a 60mm hose to be fitted.
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↓ (23-04-15) This Extractor was for sale on ebay, buy it now 350 pounds, located in Woodhall Spa.

This looks like it is the same as the Lincoln Extractor that was for sale in Lincoln (see next item).

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↓ (23-04-15) This Extractor was for sale on ebay, buy it now 750 pounds, located in Lincoln.

This Extractor was part of a Clarkson Mark1 sale.
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↓ (25-10-15) This Dust Extraction Unit was for sale on ebay, buy it now 120 pounds, located in Dereham.
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↓ (29-07-15) This Dust Extraction Unit was for sale on ebay, located in Whauphill.
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↓ (10-11-14) Dust Extraction Unit and Sand/Bead Shot Blasting Cabinet, located in Northampton.
The Dust Extraction Unit is made by Clarkson.
This is the first Clarkson Sand/Bead Shot Blasting Cabinet I have seen (if it is a Clarkson?).
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↓ (18-06-14) This Dust Extraction Unit sold for 102 pounds, located in Daventry.
These are very nice pictures showing most of the details.
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↓ (28-08-13) This Dust Extraction Unit was for sale on ebay, located in Alitwaite.
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↓ (04-06-13) This Dust Extraction Unit was for sale on ebay, located in Arundel.
It was described as 36 inches high by 18 inches wide, a two man lift that will fit in a hatchback. The motor is 0.5hp 3 phase.
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↓ (18-05-13) This Dust Extraction Unit was for sale on ebay, located in Lincoln.
It was described as 30? inches high by 18 inches wide.
Here you can see the square exhaust port.
The fan must be stopped before using the red Filter Shaker Knob.
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↓ (03-05-13) This Dust Extraction Unit was for sale on ebay, located in Leeds.
It was described as 36? inches high by 18 inches wide.
The filter is cloth.
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↓Dust Extraction Unit - Cylindrical
I don't know what those rubbery/jelly things are?
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↓Dust Extraction Unit - Cylindrical
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↓Dust Extraction Unit - Cylindrical
↓The square exhaust port can be seen to the lower left of the machine where the Union Jack sticker is.
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↓Dust Extraction Unit - Square
This Dust Extractor was described as:-
Clarkson DCE Single Phase Dust Extractor
Model - DX7, Serial Number - 502, 421, 0.75 Kw, 240V, 1PH, 50Hz, Single Phase.
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↓Dust Extraction Unit - Square
The black knob on the front of the unit is the Filter Cleaner Knob.
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↓Dust Extraction Unit - Square
The March Engineering units appear to be exactly the same as the Clarkson badged units.
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↓Dust Extraction Unit - Square
The Dust Inlet spigot is on the lower right.
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