Clausing/Colchester Geared Head Lathe Features
Headstock: The rugged headstock is designed to provide maximum power for roughing cuts, and smooth, quiet power for fine finishing. The 12 all-geared speeds, from 40 to 2500 rpm, handle a wide variety of work at top efficiency. All headstock gears are hardened and ground, and headstock shafts are splined and turn on anti-friction bearings. Increased mass and rigidity of the headstock mean much less transmission noise, and less deflection than previous models. Spindle bearings, gears, shafts, and headstock clutches are lubricated by a pumped bath of oil.
Universal Gear Box: A broad range of Feed and Thread selections is available by using three selector levers and an 8-position rotary dial. Feed selections automatically disengage the leadscrew drive and independent torque-limiting clutches give accidental overload protection on both the leadscrew and spline shaft. All gears are hardened, and shafts turn on anti-friction bearings.
Bed and Base: The sturdy bed is manufactured from close-grained cast iron, which is induction hardened and ground. The combined vee and flat configuration gives optimum kinematic guiding of the slideways…allowing both precise, accurate machining, and vibration-free cutting. The control base is rigidly constructed, and incorporates a readily accessible coolant tank mounted at the rear of the machine.
Apron, Saddle, and Slides: For optimum precision, the cross slide runs along a dovetail guide, and both saddle and cross slide are provided with adjustable gib strips. For heavy cutting, either the saddle or cross slide can be locked, and anti-backlash adjustment is provided on the cross slide nut. Bed wipers and an apron mounted one-shot lubrication pump are provided as standard. The cast iron apron is totally enclosed and splash bath lubricated. A double halfnut assembly is provided for maximum life and screwcutting accuracy. The drop-out worm feed control is mechanically interlocked to prevent simultaneous half-nut and spline shaft engagement.
Clausing/Colchester Geared Head Specifications

Capacity
Height of center
6.5”

Swing over bed
13”

Swing in gap
18.8”

Width in front of faceplate
4.5”

Swing over cross slide
8.26”

Bedway width
12.5”
Headstock
Spindle bore
1.5”

Spindle nose (camlock)
D1-4

Spindle nose taper
3MT

Number of spindle speeds
12

Spindle Speed Range (rpm)
40-2500
Cross/Top Slide
Travel of cross slide
7.5”

Width of cross slide
5.5”

Travel of top slide
3.63”
Width of top slide
3.25”
Tailstock
Quill travel
4.38”

Quill diameter
1.63”

Quill taper
3MT
Feeds & Threading
Longitudinal feed range
0.001”-.039” in/rev

Number of inch pitches
35

Range of inch pitches
2-56 TPI

Number of metric pitches
39

Range of metric pitches
0.2-14mm

Number of diametral pitches
18

Range of diametral pitches
8-56 DP

Number of module pitches
18

Range of module pitches
0.3-3.5 MOD
Motor
Spindle motor
3 hp
Dimensions
8026J and 8026J1
13” x 25” G/H Gap

Length x Height x Width
67” x 58” x 37”

Weight
1,680 lbs.

8027J and 8027J1
13” x 40” G/H Gap

Length x Height x Width
82” x 58” x 37”

Weight
1,960 lbs.
Standard Features

Center Bushing
Two 3MT Centers
Inch Threading Dial
Accuracy Chart
Parts and Instruction Manuals
Splash Guard
Coolant System
Set of Wrenches and Keys
208/230 or 460 volt, 3 Phase, 60 hz. Motor (must specify voltage) (other voltages may require a transformer)