The ML7 Lathe was launched in August 1946, the basic bench lathe retailing at £34.00. The ML7 was so successful that it saw the immediate demise of its predecessors the ML2 and ML4. The Myford ‘M' type, a Myford version of the Drummond ‘M' type, cost £42.00 and production of this was discontinued in 1949. It is a quick change gear floor-type lathe with the cast storage legs. The serial number is A324 and it is battle. It was listed on Craigslist, Leblond Lathe, 15×42, 3 Hp, complete with 6- jaw chuck, 4-jaw chuck, faceplate, steady rest, taper attachment, instruction manual. A pattern machine (presumably a sample) was dispatched to Myford on March 25th, 1943 and the final M-type from the Drummond production line was sent to the Admiralty on the June 30th of the same year. Round Bed Serial Numbers Machines with an 'A' prefix are pre 1920 - afterwards '0' was used.
Boxford Belt-drive Lathe Manual as a comprehensive Data Pack. A complete, high-quality 222-page publication for all models of belt-drive Boxford lathe from earliest to last.
CVA Single Spindle Automatic 'A Series' Nut Tapping Attachment. Spare Parts Manual as Exploded Component Diagrams.
CHALLENGER Lathe. Sales & Technical Specification Catalogue. 8 pages.
Drummond 4' Type A Round-Bed Lathe: Sales Booklet. 12 pages.
Drummond: Special Attachments & Accessories for Type A Round-Bed Lathes. 12 pages.
Drummond: 'Lathe Work'. An interesting Works Booklet showing examples of Models and other projects by amateurs demonstrating the versatility and capacity of the Flat and Round-bed lathes. 24 pages.
Also included are copies of both the pre and post-1925 screwcutting and feed charts.
Drummond: Special Attachments and Accessories for Type A Round-Bed Lathes. 12 pages.
Drummond Machine Tools: data pack of catalogues with all publications for the Flat and Round-bed models covering 1902 until 1946.
Holbrook Model A Lathe: Well illustrated and detailed Sales & Technical Specification & Accessories Catalogue.
I900 IXL Lathes. Sales & Technical Specification catalogue showing the most common models: 5-inch Model W3 (with bar-braced headstock), Model A.K.T. and Model A. 4 pages.
L444
Lorch Lathe Accessories for Models A, B and C. 19 pages
Meddings and Meddings 'Pacera' drilling machines (these were the early models made during the 1930, 1940s and early 1950s). Detailed Sales & Specification Catalogue set showing the range of models from the 1940s until the 1970s Series 'L', 'MB', 'MF', 'HB', 'F', 'A', 'P', Multi-head, 'W', 'WA', Special-purpose machines, Jig Saws, Fret Saws, Hacksaws, sanding drums and all the many accessories, etc.
For details how best to employ this type of drill the book shown below is a valuable guide to all matters 'drills and drilling'.
Acorntools 10-inch and 12-inch Lathes (Atlas 10-inch Clone): A complete package of information that covers all models from the first models to the last is available. It includes:
Barber-Colman Type 'A' Gear Hobbing Machine: Operating Manual.
Beaver Model A (round ram) Vertical Miller. Operator's Instruction and Maintenance Booklet. Includes a copy of the Maker's Sales, Specification and Accessories Catalogue.
Bechler Type A Automatic Lathes. Detailed Operator's Instruction and Settings Manual with many useful sectional drawings.
BECHLER Types A and AE Automatic Lathes. Drawings, General Plans of Installation, Tables of Speeds and Instructions for Setting Up Includes many sectional drawings and instructions for dismantling and adjustments. An original works copy, not a reproduction.
Bechler Type A and Type B Automatic Lathes. Instructions for Calculating Cams and Production Times.
Bechler A and B Lathes. 3-spindle Universal Combined Threading, centering and Drilling Attachment. Detailed Operating Instruction Manual for both the single and twin-belt types.
Bechler A, AE, B and BE Lathes. Slotting Attachment. Detailed Manual for Setting up with Sectional Drawings, Annotated Photographs and Cam Design Instructions and Diagrams.
Broadbent and Schofield (also 'Oldfield' and 'Schofield') Drum lathes with headstocks Type A, C and D Type. General Instruction and Operator's Instruction Manual.
Broadbent and Schofield (also 'Oldfield' and 'Schofield') Drum lathes with headstocks Type A, C and D Type. 6 large engineering drawings.
Cleveland Model A 'New Design' Single Spindle Automatics - Parts Manual as detailed Cross Sectional Drawings.
Coleman Type A Hobbing Machine. Detailed Operator's Instruction Manual.
Cone 'A' Models - all Types. Operator's Instruction Manual.
CVA 'A Series' Single Spindle Automatic Lathes A12, A16, A20. Operator's Instruction Manual with a wiring diagram.
CVA 'A Series' Single Spindle Automatic all A12, A16 and A20 Types. Parts Manual as Exploded Component Diagrams.
CVA Single Spindle Automatic 'A Series' Secondary Turret and vertical Drilling Attachment. Operator's Instruction Manual and Parts Manual as Exploded Component Diagrams.
CVA Single Spindle Automatic 'A Series' Attachments (vertical slide, slotting, deburring, drilling, turret milling, etc.). Spare Parts Manual as Exploded Component Diagrams.
Dean, Smith and Grace Type A and B lathes from the late 1930s and into the 1940s (marked variously as A, B, 4AN, 4AV, 4BN, 4AB, 4BR, 4AR, 4ABR, 4BDR, 4BZ, etc). These lathes had simple lever control of spindle speeds together with pick-off gears inside the headstock for which instructions are given. Rather basic Instruction Book with Threading and Speed Charts and Clutch Adjustment details plus a splendid Catalogue (June 1948) showing the Model A & B lathes in all their configurations.
Denford Zeroturn Lathe. Fanuc OT-Model A Operators Manual.
DIAFORM Wheel Forming Attachment . A Data pack with a copy of the Diaform Booklet 'Form Dressing with the Diaform Wheel Forming Attachment' - a detailed guide as to what the machine can achieve with illustrated examples of work and issued with the the early Diaform Models A, B, AT, BT, 2A, 2B, 3A, 3B, 4A and 4B. Includes copies of the maker's Sales & Specification Catalogues.
Fanuc System 2T-Model-A and 3T-Model-C: Maintenance Manual.
Fanuc System 11M Model A. Instruction Manual For Programming No. 2
Fanuc Series O Series, 0 Mate Series and OO Series including Series 0T Mate-Model A, OM Mate Model A, OT-Model A, OM-Model A, OOT-Model A, OOM-Model A. Maintenance manual.
Fanuc Series O Series, 0 Mate and OO Series including Series 0T Mate-Model A, OM Mate Model A, OT-Model A, OM-Model A, OOT-Model A, OOM-Model A. Operator's Instruction Manual. 465 pages
Fanuc Robot A-Model 1 Comprehensive Users Manual (511 page)
Fanuc Robot A-Model 1 Maintenance Manual with Electrical Diagrams.
Fanuc Robot A-Model 1 'Descriptions' - Plain-language description of the machine's functions and abilities.
Fanuc Robot A-Model 1 Connecting Manual description of the Interfaces required when setting up the machine.
Fanuc System 10M-Model A, 11M Model A and 12M Model A Operator's Manual.
MF11A2
FANUC Model A and T Series 16i, 18i, 21i, 160i, 180i, 210i. Connection Manual (the manual describes all the NC functions required to enable machine tool builders to design their CNC machine tools. Includes:
General features of the functions, Signals, Parameters, Alarms and Messages, Reference Items. £195
Series 16i, 18i, 21i, 160i, 180i, 210i Model A. Connection Manual (Hardware). £95
Fellows Type A Gear Shaper. Parts as Exploded component Drawings.
Fortuna AFB-A and AFB-AM (AFB-300 Finimag). Operator's Instruction and Maintenance Manual
Hardinge DSM-A Lathe. Maintenance Manual with large Electrical and Hydraulic Schematics. Includes 6 pages of Maintenance Notes not in the original Manual.
Hardinge DSM-A Lathe. Maker's Training Manual for Operator's.
Hardinge DSM-A Lathe. Parts List as Detailed Sectional Drawings.
Hancock (Hanco-Mark) range of machines (cutting and profiling Types A and B all size). Detailed Instruction Manual, Parts Manual as Exploded Component Drawings and Maintenance and fault-finding Guides. Instructions.
Hitachi Seiki HG-43500. Parameter Lists for Fanuc Series 16i-M Model A.
Ibarmia Drills A, B and S series. Operation, Maintenance and Parts Manual.
Kerry (Q and S) Drill 'Super 8' 'Backgeared Type': Instruction Manual and Separate Parts Manual as Sectional Drawings - all scanned at high resolution and some, of the head, extracted and enlarged. Includes copies of early and late maker's comprehensive Technical Sales and Specification Catalogues. Covers all models: early 'round' style A, B and S and the later more 'angular' Series 'U'. A complete data pack for the machine.
Landis Handbooks (2 editions) for Chasers & Die Heads: Operator's Instruction and
Maintenance Manual for Lanco Type R hand-operated machines, Lanco Head
Type MR, Landex Heads Types J, JX, MJ & MJN for Automatic Screw Machines, Landmatic Head Type A, F and MF for Turret Lathes. Includes grinding threads with and without leadscrew feed, tapered pipe threads and rake or cutting angles. General grinding instructions; setting Landis Chasers; Operation of Landis Die Heads; left-hand threads; cleaning, adjusting, repairing and lubricating Landis Die Heads. £37
Leadwell MCH500 Service Manuall. A comprehensive guide to the machine with Parts as Sectional Drawings and Fanuc System 10M-Model A Controls
LeBlond Regal Lathes (13' to 19') early 1940s to late 1950s. These were designated: A = 10', B = 13', C = 15', D = 17' E = 19', F = 21', H = 24', The lathes remained largely unchanged mechanically from their introduction until the late 1950s - although the stands and drive systems were modernized to make the machines more compact. A detailed and comprehensive Operation, & Maintenance Manual with a Parts Manual as clear Exploded Component Drawings.
Mikron Type A 21/0 Gear Hobber. Operator's Manual with Repair and Maintenance Instructions and Electrical Schematics Set.
Mikron Type A 21/2 Gear Hobber with Electro-Hydraulic Control. Operator's Manual with Repair and Maintenance Instructions and Electrical Schematics Set.
Mikron Type A 24/0 Gear Hobber. Operator's Manual with Repair and Maintenance Instructions.
Newall-Keighley Fine Boring Machines Models A and B. Operating and Maintenance Manual with Electrical Schematics.
Oldfield and Schofield (also Broadbent and Schofield) General Instruction and Operator's Instruction Manual for the Type A, C and D Type lathes. Includes an electrical diagram.
Pratt and Whitney Tape-O-Matic Drilling Machine Model A. Full Data Pack including: Operator's Manual, Electronic Manual, Trouble-Shooting Guide, 2 Editions of the Elementary and Logic Wiring Diagrams and the Quantizer Emitter Follower and Block Fitting Instructions.
RICHARDS (George Richards and also found badged Staveley) 'Electrabore' Boring and Facing machine. Covers all sizes (A, B and C) and sizes e.g. some being marked: WB15, WB20, WB30, WB40, WB50, etc,
Sheraton '9-Inch' lathe. The very best Manual is the one produced in England for the South Bend clone made by Boxford. Unlike the South Bend book 'How to Run a Lathe' this 170-page edition concentrates in detail on the 9-inch lathe. I have also added all the known relevant South Bend 9-inch data to give a complete data pack for the machine: operating instructions - extra comprehensive screwcutting charts with metric conversions for both the changewheel and gearbox models and other valuable data.
Smart and Brown Model A Lathe Mk.1 and Mk.2: Data Pack consisting of two editions (early and late) Operation & Maintenance Manuals with electrical schematics, Spare Parts Manuals as detailed sectional drawings and a copy of the comprehensive Sales and Specification Catalogue.
Taylor Hobson Model D Pantograph Engraver (also covers the head section of the A). Parts Manual as Sectional and Exploded-component Diagrams.
THOMPSON Grinder Co. (USA) Surface Grinding Machines Models A, B, C, BB, 4C, 5C & 3B. Operating manual with bearing and other adjustment instructions. Includes sectional drawings through a number of parts.
Traub Strohm: Type A Single Bar Hydro Feed Units - as used on many makes of lathe. Operating and Service Instructions.
Traub Strohm: Type A Automatic Bar Loading Magazine. Operator's Instruction and Service Instructions with Electrical Schematics.
YAMAZAKI MAZAK Precision Lathe Models A, B, C and D - sometimes marked as the Model MK530 (the carriage handwheel can be found both on either the left or right-hand sides of the apron). Operating Manual with Parts as Detailed Sectional Drawings. Includes high resolution pictures of the often worn-out screwcutting and feed chart and a copy of the maker's detailed and well-illustrated Sales & Specification catalogue. Although the operating instructions are basic,but. rest of the publication superb.
Pollard Corona Drills. Full-range catalogue showing drills manufactured during the 1940s and 1950s.
SMART & BROWN Models L and A Precision Plain Turning Lathe. Sales & Technical Specification Catalogue - 1945. 1st edition. Superb pictures. 35 pages.
Smart & Brown Model A Toolroom Lathe: Sales, Specification & Accessories Catalogue. 14 pages.
TAYLOR HOBSON Pantograph Engravers: Sales & Technical Specification Catalogues that cover the Company's Models C, CB, CX, CXL, JH, A, D, NH, K, Model K Mk.2 and the 'Pantograph Milling & Diesinking Machine' 50 pages.
Taylor Hobson: a collection of individual Sales and Technical Specification Catalogues that cover the entire range of post 1930 Pantograph Engravers as made until the 1970s:
Model A early; Model A late; Models C, CX and CXL; Model D early; Model D late; Model JH early; Model JH late; Model K Mk.1; Model K Mk.2 early; Model K Mk.2 late; the special Taylor Hobson inclinable dividing head and the 'Pantograph Milling and Diesinking Machine'; 52 pages.
THIEL Automatic Screw Machine Type A.D.S. Sales & Technical Specification Catalogue. 4 pages £10
These pictures are of a plate from WWII US military plane that crashed in the high mountains of central Japan.
People living there say that after the war officials recovered the crash sites and some parts were put on display in a museum nearby. This plate is attached to a small metal box which is part of the museum collection.
It says 'gear box type JH-1045' manufactured by 'Jack & Heintz, Cleveland Ohio'.
But SPEC. and SER. are blank. I assume these are where the spec number and serial number should go?
It looks like somebody carefully cut those parts off the plate. People there say that was not done after the recovery, so the plane was flying with this plate as it is. Nobody remembers the type of aircraft nor where the rest of the wreckage went. I do not know whether the numbers were scraped off before flight or were just originally not there.
Why are these spec and serial numbers blank on the parts plate of a WWII US military plane?
Regards,Naoya
3 Answers
$begingroup$I suspect the reason for this has nothing do with aviation and better fits at our history or statistics stackexchange counterparts.
Information about the production capacity of the enemy is of major strategic importance. Using the serial numbers of a relative few aircraft one can make a quite accurate estimate of the total number of aircraft produced. This was found out during world war II and is known as the German tank problem.
What I suspect is that after this methodology was developed, producers were asked to withheld the serial numbers from their products and/or replace them by a cryptographic equivalent.
DeltaLimaDeltaLimaThe item shown is an inertial starter which was used for various purposes including opening the bombay doors of B-17s.
The serial number was stamped into a strip of zinc or lead that was affixed to the plate as shown below:
The strip could have:
(1) deteriorated and fallen off
Vintage South Bend Lathe Serial Numbers
(2) been removed when someone cleaned the item
(3) melted off in a fire
Since it was in a crashed aircraft, it would not be surprising if the strip was damaged or removed somehow.
Tyler DurdenDrummond Lathe Serial Numbers
Tyler DurdenDrummond Lathe Serial Numbers List
$begingroup$There may be a simpler explanation than missing lead strips or a deliberate attempt to avoid the 'German Tank Problem' ... someone may have decided, between the design of the casting, and the manufacture of that component, that there wasn't enough value in the serial number to justify the time and expense of stamping it and recording the serial number in a ledger.
You Serial Numbers
If a small company was swamped with orders for thousands of components on impossibly short timescales under wartime conditions, this saving is quite likely.
Image shows a plate from a pre-WW2 machine tool, where there was no need to hide the production quantity - it was simply never recorded on the plate. However on these tools, the the serial number was stamped somewhere else on the machine. Ironically, the Admiralty version of some of these tools supplied during WW1 was faithfully logged by serial number and can be traced to the original ship the lathe was supplied to.
Serials Cracks
South Bend Lathe Serial Numbers
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