the triangular-bed Glashütte lathe was manufactured in the 1800s by Ernst Kreißig, a maker of watchmakers' tools from the Glashütte area near Dresden. Glashütte was not only the German centre of high-class watchmaking (and a watch-makers' school) but also home to several machine-tool builders including Karl Renner. Although Kreißig offered several versions of his lathe his later models were more conventional in appearance, resembling those from Lorch and Boley. After WW2 Kreißig was trapped inside the Russian-occupied zone and, machines from the West needing hard-to-obtain D.Marks, most of the company's output was destined for local consumption.
Although the triangular bed might be considered a trade mark signature for many makes of precision lathe from the late 1700s to the late 1800s - the most famous being Henry Maudsley's revolutionary screwcutting lathe of around 1800 - its use also extended to small lathes for watch and clock work with the original machines produced by the well-known Gustav Boley (G.Boley) being of this pattern.
Because draw-in collets retained by a threaded tube passing up a hollow headstock spindle had yet to be invented - that was a development first incorporated in the American Webster Whitcomb lathe of 1888/9 - the headstock of the Glashütte had to be designed in an ingenious way. This was accomplished by separating it into two sections with that on the left (its shape strongly reminiscent of watchmaker's "turns") supporting a 2-step pulley with the drive transmitted, through a pin and dog, to a spindle supported in the other, right-hand element. This arrangement left a length of spindle exposed along its middle section through which was cut a slot, matching one also broached through each collet's solid 5.3 mm diameter stem. To lock a collet in place a long key was passed through the slots - leaving its ends protruding from each side of the spindle - and a knurled-edge ring screwed backwards against it. Although this assembly performed perfectly it required advanced standards of engineering craftsmanship to work accurately - craftsmanship that - without the aid of yet-to-be-invented shaping, planning or grinding machines - would have involved the finest of hand-fitting skills.
An unusual attachment for the time - and one that was remarkably sophisticated and delicate in operation - was a compound slide rest. Fitted with beautifully-made horn handles this followed customary practice by using ordinary right-hand threads - so giving a "cack-handed" operation where turning the screw "inwards" caused the slide to move "out". The rest of the lathe also reflected early 19th century ideas - with even the fixed steady mimicking those used on larger lathes having a series of different diameter bevelled holes around the periphery of a disc.
The Glashütte is very rare, only one having come to light in recent years. If you have one, the writer would be interested to hear from you..
Fischer were German lathe manufacturers, based in the town of Freital in Saxonia. Inscribed on the older machine illustrated below - probably from the early 1920s - is the following legend:
Fischer & Co. Komm Ges Speczialfabric fur Drehbanke Freital i. Sa. Other pre-WW2 machines have been found with: Fischer Spezialfarbik für Drehmaschinen GmbH, Freital in Sachsen. After WW2, the town of Sachsen became part of the GDR (German Democratic Republic, the communist-controlled East Germany) and company's name was changed to VEB, a German abbreviation for Volkseigener Betrieb, the People's Enterprise.
Shown below is a Fischer lathe with a swing over the ways of approximately 15 inches and a distance between centers of 40 inches. The V-belt driven headstock incorporated a clutch with the six spindle-speeds selected by two levers, one on the front of the headstock and the other on top - the label on the headstock reading:
Scalten-nur beim Auslant

Umdr. der Arbeit ssp. pr. 1 min.
Hebel Mit Vorgelege ohne Vorgelege
Middle 26 151
Bottom 47 273
Top 84 490
A basic translation would read: Let the lathe stop before changing gear and Lever with reduction gear and without reduction gears Thus, the spindle-speed range ran from: 26, 47 and 84 r.p.m. in backgear and: 151, 273 and 490 r.p.m. in direct drive.
A conventional tumble-reverse mechanism was incorporated inside the headstock casting and below the left-hand end of the headstock spindle; it drove down to a screwcutting gearbox with outputs to a leadscrew and a powershaft for sliding and surfacing feeds.
Pictures of later Fischer lathes can be seen here.
If any reader has details of Fischer machine tools, the Fischer Company or Fischer advertising literature the writer be pleased to hear from them.


Manufacturer: CRAVEN (U.K.)
Capacity: 72" Swing Diam. x 48' Between Centers
Speed Range: 0.8 - 95 RPM -FULLY VARIABLE, (Solid State Control)
Threading: Inch and Metric
Leadscrew: Dual, both on front and rear
Chuck: 70", 4-Jaw chuck
Steady Rest: Yes, large 3 Stedy Rest; 2 point Follower
Motor Power: 60 HP
Machine Weight: ±120 Tons (±240 000 Lbs)

Equipped With:

* Twin Carriage, Run on Front or Back
* Rapid Traverse
* Full length Dual Threading; Leadscrews front and back
* 4 Prismatic Square Ways, (shears)
* Rebuilt Headstock at cost.........$107,000 (CAD)
* Full Solid-State Electronic VARIABLE SPEED CONTROL, Cost $32,000 (CAD)
* Motorized Tailstock
* Large box of miscellaneous goodies, not even opened

Price (FOB our warehouse, near N.Y. Border): .


Stock No: 1868


Manufacturer: CMC (Canada Machinery Corp., Galt, ON)
Serial No.: 6848
Swing in Gap: 116" x 76" btc (in gap)
Swing Over Bed: 64" ±
Between Centres: 14' ±
Faceplate: 76" (with slide gap grooves & bolt slot - with rim or spindle drives)
Note: Faceplate outer rim has screw adjustable back up rollers
Spindle Speeds: 8
Threading: 17 threads from 1 to 18 tpi (incl 11.5 ")
Spindle Drive: V Belt main drive to spindle through electric clutch
Electrics: 10 - 15 HP - 550V/3Ph/60Hz Belt Drive

Equipped With:
* Pendant Control, (Telemecanique push-button remote motor starter)
* Drip Central Lube to Main Gear Box
* 4 Centres
* Cutting Tools
* Change Gears, T Bolts, etc.
* Large T - slot Extension Forward from base to allow machining O.D. of
largest parts - 70" L-R X 36" F-B
* Two Compound Slide Risers

Dimensions: 180" Overall (with minimum gap length)
90" F-B (with faceplate installed)
120" Height Overall (106" Height with motor drive removed)

Price (FOB Canada, Montreal): $7,500.00 USD


This high-precision lathe is German made to the highest standards. Designed
specially for the rapid turning of extremely precise rings and disks, such as used in
jet engines and turbines of all kinds, this lathe will substantially enable the production
of all circular workpieces within its range, such as piston rings, bearings and
bearing mounts, shims, spacers, valve components, etc. up to a 1250 mm
(50" nom.) diameter.

Manufacturer Heyligenstaedt (Germany)
Model: DPN 1250

Main Dimensions
Centre Line Over Shop Floor: 72.83"
Centre Line Over Operator's Platform: 52.95"
Max. Workpiece Diameter: 49.21"
Adaptor Diameter for Clamping Discs: 59.06"
Max. Workpiece Width: 13.78"
Chuck Speeds: 2.5 - 250 RPM (infinitely variable with
cutting-speed adaptation)
Table Speed Range
No. of gear ranges: 4
Driving Power: 50 HP, plus auxiliaries

No. of Carriages: 2
Carriage Travel: 20.47 ( Z and W axis )
Carriage Travel: 50.61 ( X and U axis )
Accuracy Both Heads
Z axis ± .0004"
X axis ± .0004"
Repeatability - Both Heads
Z axis ± .0002"
X axis ± .0002"
Z and W Axis: 3.94 ipm
X and U Axis: 3.95 ipm
Rapid Traverses
Z- and W axis: 236.22 ipm
X- and U axis: 236.22 ipm

Automatic Tool Changer: 12 Tools, both sides

Max. workpiece weight: 10,000 lb.

Machine Weight, total: 38 tons

Design Features:

"... The chuck ring for tool accommodation has special [hydraulic pressurized]
double anti-friction bearings. The drive is effected via a helical rim gear. There is
continuous oil temperature/flow monitoring depending on revolutions. The
labyrinth packing of the main bearing includes a pressurized seal, guaranteeing the
integrity of the oil film, even down to zero revs, meanwhile totally excluding entry of
all coolant. The cross-travel bedways are parallel to each other on both sides of the
chuck and each accommodates one carriage for turning operations. Bed and carriage
slideways areprovided with fully hardened steel strips and pre-loaded rollers. ... "
-from mfr's technical design description

With excellent access from both sides of workpieces, the heavily-built, yet
compact opposed auto tool-changer turrets, enable this lathe to quickly generate all
turned pieces within its range in HALF the time of all ordinary turning centers. Even
more savings, in both precision and in total machining time,- are realized compared with
doing this kind of work on VTL's or Boring Mills. Up to four work area TV cameras
and monitors viewing the work area help the operator monitor all machining
functions in machining operations.

This lathe was part of a P & W plant closure in Connecticut, USA. It had hardly been
used at all and was well maintained. We've had it thoroughly inpsected, prior to full
re-configuring to the special needs of one of the world's top aerospace manufacturers,
and by one of U.K's top machine tool rebuilders. They are extremely happy with the
condition of our machine; their visting agents pronounced it in "superb condition" and
are now ready to fully rework this fine machine with any controls and modifications
required, while maintaining or exceeding the original performance,- to your most
exacting requirements.

PRICE, to be arranged, with chip conveyor, existing or new controls, all manuals,
complete, delivered to your factory in Europe or N. America . . . . . . £$DM¥
gambar mesin bubut

Max, Swing over Bed: 90"
Max. Center Distance: 52' 5" (with right end of tailstock flush to end of ways)
Faceplate: 60" 4-Jaw Chuck
Speeds: 16
Speed Range: 1.85 - 59.3 RPM (Var Speed Control added)
Controls: Push-Button Stop-Start Forward-Reverse-Jog
Threading: Full length
No. of power Feeds: 48
Feed Range: LONGITUDINAL, from .011" - .628"
CROSS, from .007" - .400"
No. of threads cut: 48 (w, 3 change gears. Others also supplied)
Threading range: From ¼ - 14 tpi (incl. 8 ½)
Spindle Bore: 2-3/4"
Steady Rests: Yes, Roller type: 66" Ø
50" Ø
30" Ø

Carriages: Heavy Duty, with Factory risers, central pressure
lube aprons, and with 4 side Toolblock clamping, on top
compound, on graduated swivel risers, mounted on main
crosslides. Motorized Rapid traverse on front of apron.
Tailstock: Offset geared-feed type for ease of use
Quill size: # 7 Morse Taper
Offset travel: Cross travel offsets up to 7" (for long tapers)
Live Center: Yes (almost new)

Construction: HEADSTOCK: standard countershaft type layout. Main
gearbox with Quick-Change selection of Feeds, Speeds and
Threads; Full motorized lubrication to main bearings,
gearbox etc. Full length leadscrew has take-up adjustments
for play etc.
BED: Two piece: 10" W. Flat ways, some scoring, but
easily re-surfaced.
Main Motor: 40 HP 3 Ph @ 875 RPM (larger easily fitted)
Dimensions: 64'6" (on floor) + cable recoiling reel
109" High + Levelling jacks (up to 7" extra if needed)
Weight: 35 - 40 Tons (est.)

Lathe is Equipped with:

* Rapid traverse
* Full-length threading to very large pitches
* Two piece bed & lead screw for ease of shipping & assembly
* No pits
* 3 Large Roller Steady Rests
* 60" 4-Jaw chuck / Faceplate
* Large & Heavy Duty

NOTE: JOHN BERTRAM & Sons, Ontario, built larger, heavy-duty and precise
machine tools until the 1960's. Parts are still available. Many major American machine
tool names of the mid-twentieth century were also built in Canada, and in many Bertram
versions, they were IMPROVED on the original design. Examples are Niles-Bertram,
Cincinnati-Bertram & Acme-Bertram etc. In MOST CASES, the BERTRAM version
was better built, often because the improvements were not yet incorporated into the
original American design.

Price: . . . . . . . . . . . . . CALL

Lathe is a process that pemakanan workpiece sayatannya done by rotating the workpiece and then imposed on the chisel driven by translation parallel to the axis of rotation of the workpiece. Swivel movement of the workpiece is cut relative motion and move the translational motion of the chisel called bait.

By setting the ratio of the workpiece rotational speed and the speed of translational chisels to get some kind of screw with different sizes ranging. This can be done by way switch gear that connects the axis translation spindel the screw axis.

Exchanger gears provided specifically to meet the needs of manufacturing the screw. The number of teeth on each cog swapper size varies from the amount of up to 15 maximum number of 127 teeth. Exchanger gears with the number 127 has a specificity that is used for conversion from metric to a threaded screw inches.

[edit] The principle of lathe work
Lathes that use a belt at the Hagley Museum

Spindel axis of the workpiece will rotate through the carrier plate so that the gears rotate on its axis spindel. Through liaison gears, rotation will be communicated to the screw shaft gear. By clamp threaded, screw shaft rotation is converted into translational motion on the sled that carries a chisel. As a result the workpiece will be screw-shaped incision.

[edit] The parts of a lathe

Lathe machine consists of a table and his head still. At the head still have the wheels spin gear changers who will play spindel axis. Axis spindel will menmutar workpiece through gallant. Main sledge will move along the table with a sledge and sleigh on the latitude and chisel holder. The main source of all those moving from an electric motor to rotate through belt PULLEY.

[edit] Types of Lathe Machine

1. Universal Lathe Machine 2. Special Lathe Machine 3. Conventional Lathe Machine 4. Lathe Machine with Computer (CNC