This machine is designed for turning and machining large workpieces and steel bar stock. It is well suited to demanding industrial applications, including oil and gas pipeline production, aerospace manufacturing and heavy-duty shaft machining.

1. Spindle and Headstock
-The spindle is available with either a 105 mm (4 in) or 152 mm (6 in) bore and provides 12 spindle speeds. A turbine-type speed-change mechanism helps prevent gear jumping, while the headstock is supported at three points to provide excellent rigidity and stability.

-Models with a spindle bore of 152 mm (6 in) or larger are equipped with an adjustable electromagnetic brake. This allows the braking response to be adapted to different workpiece materials and spindle speeds.

-The gears and shafts are manufactured from high-grade alloy steel and supported by quality NSK bearings, providing durable cutting performance and reduced operating noise.

-A sealed oil-bath lubrication system uses a mechanical pump to provide forced oil circulation, ensuring consistent and effective lubrication throughout the headstock.
The headstock shown is equipped with a 152 mm (6 in) spindle bore and a 12-speed spindle system.

2. Base
The machine bed is manufactured from high-strength Meehanite cast iron and carefully stabilised to maintain alignment and machining accuracy. The bedways are induction-hardened and precision-ground for excellent wear resistance and long service life.
The one-piece cast base provides superior rigidity and stability, supporting greater machining capacity under demanding operating conditions.

3. Gearbox
The quick-change universal gearbox supports metric, imperial, diametrical-pitch (DP), module-pitch (MP) and multiple-start thread cutting without requiring change gears. Its broad threading range and straightforward controls improve operating efficiency and productivity.

4. Tailstock
The tailstock features a two-stage feed mechanism and a saddle-assisted movement system, allowing the tailstock body to travel smoothly along the bed with minimal operator effort.

5. Electrical System
The machine is equipped with a 20 HP motor, a two-stage safety start-up system and overload protection that automatically disconnects the power supply if an unsafe load is detected.

6. Apron
The apron is equipped with rapid traverse, forward and reverse movement, and an integrated safety mechanism. A sealed oil-bath system provides automatic lubrication, while rapid cross-feed improves operating efficiency.

7. Saddle
The saddle surfaces receive an anti-friction treatment and are supplied with regular oil lubrication, reducing wear and ensuring smooth, durable operation.

8. Castings
The principal structural components, including the base, headstock, saddle and tailstock, are manufactured from high-quality FC-30 cast iron. These components are annealed to relieve internal stresses, improve dimensional stability and minimise deformation.

9. Precision Treatment
Critical components—including the bedways, spindle, saddle, cross-slide dovetail surfaces, top slide and tailstock quill—are treated using high-frequency hardening to improve surface hardness, wear resistance and service life.


Capacity
(HT-860) Swing over bed: 860 mm
(HT-960) Swing over bed: 960 mm
(HT-1120) Swing over bed: 1120 mm
(HT-1220) Swing over bed: 1220 mm
(HT-860) Swing over cross slide: 540 mm
(HT-960) Swing over cross slide: 640 mm
(HT-1120) Swing over cross slide: 800 mm
(HT-1220) Swing over cross slide: 900 mm
Distance between centres: 1000/1500/2000/3000/4000/5000/6000/7000 mm

Bed
(HT-860) Swing over gap: 1200 mm
(HT-960) Swing over gap: 1300 mm
(HT-1120) Swing over gap: 1460 mm
(HT-1220) Swing over gap: 1560 mm
Width of Bed: 510 mm (20 in)
Length of gap (spindle end face): 240 mm
(1000) Length of bed: 3300 mm
(1500) Length of bed: 3800 mm
(2000) Length of bed: 4300 mm
(3000) Length of bed: 5300 mm
(4000) Length of bed: 6300 mm
(5000/6000/7000) Length of bed: 7300/8300/9300 mm

Headstock
Spindle bore diameter: 105 mm (4 in); optional 152 mm (6 in)
Number of spindle speeds: HT-860/960/1120: 12 steps; HT-1220: 16 steps
Range of spindle speeds: HT-860: 23-1300 rpm; HT-960/1120: 16-810 rpm; HT-1220: 4-420 rpm
Spindle nose: HT-860: A2-8; HT-960/1120/1220: A2-11

Carriage
Width of Carriage: 660 mm
Cross slide travel: 510 mm
Top slide travel (Compound Slide): 370 mm
Maximum tool shank size: 32 x 32 mm

Tailstock
Diameter of barrel: 125 mm
Travel of barrel: 300 mm
Taper of barrel: MT6

Threads
Lead screw diameter & pitch: 45 mm diameter x 12 mm pitch
Range of metric pitches: 0.8-14 mm (65)
Range of imperial pitches: 2-28 TPI (36)
Range of diametrical pitches: 4-56 DP (36)
Range of module pitches: 0.5-7 MP (22)

Feeds
Feed rod diameter: 32 mm
Range of longitudinal Feeds: 0.050-0.70 mm/rev
Range of cross Feeds: 0.025-0.35 mm/rev

Motor
Main spindle Motor: 15 HP; optional 20 HP (6 in spindle-bore models)
Coolant pump Motor: 1/8 HP
Rapid Motor: 1/4 HP

Denver's HG series lathes are designed for demanding heavy-duty machining applications. It combines straightforward operation with excellent rigidity, stability and load-bearing capacity, making it ideal for the heavy turning of moulds, gears, wheels, shafts, spindles and similar components.

Base
The rigid base is manufactured from high-quality Meehanite cast iron for heavy-duty cutting. Its robust construction provides increased load capacity and greater stability during machining.

Compound Rest
A four-point clamping system provides excellent compound-rest stability. The wide toolpost and top slide are induction-hardened and precision-ground to ensure accuracy and a long service life.

Spindle and Headstock
The headstock provides 12 spindle speeds, while the spindle is supported at three points by precision bearings. The gears and spindle are manufactured from high-quality alloy steel, heat-treated and precision-ground for superior hardness, strength and durability.
The spindle is available with either an 80 mm or 105 mm bore.

Gearbox
The metric and imperial gearbox supports metric, imperial, diametrical-pitch (DP), module-pitch (MP) and multiple-start thread cutting without requiring change gears. Its wide threading range and straightforward operation help improve productivity.
Imperial threading is available down to 2 TPI, providing a broader threading range and greater operating flexibility than many comparable lathes.

Carriage and Saddle
The bedway contact surfaces are lined with Turcite-B to reduce friction and wear. The dovetail slideway surfaces are induction-hardened and precision-ground to maintain accuracy and provide a long service life.

Apron
A forced-lubrication system ensures that the slideways receive consistent lubrication, helping maintain turning accuracy while reducing wear.
An integrated safety mechanism helps prevent collisions during operation.

Cross-Slide Screw
The cross-slide screw is supported at two points, providing the strength and stability required for heavy-duty turning.

Tailstock
A two-stage tailstock clamping system improves stability during heavy turning and drilling operations.
A two-stage feed mechanism provides greater control and easier operation.



Capacity
(HG-660) Swing over bed: 660mm
(HG-760) Swing over bed: 760mm
(HG-800) Swing over bed: 800mm
(HG-840) Swing over bed: 840mm

(HG-660) Swing over cross slide: 400mm
(HG-760) Swing over cross slide: 500mm
(HG-800) Swing over cross slide: 540mm
(HG-840) Swing over cross slide: 580mm

(HG-660) Swing over gap: 930mm
(HG-760) Swing over gap: 1030 mm
(HG-800) Swing over gap: 107mm
(HG-840) Swing over gap: 1110mm
Distance between centres: 1170/1670/2170/3170/4170/5000mm

Bed
Width of Bed: 420mm
Width of gap (spindle end face): 305mm
(1200) Length of bed: 2600mm
(1700) Length of bed: 3100mm
(2200) Length of bed: 3600mm
(3200) Length of bed: 4600mm
(4200) Length of bed: 5600mm
(5000) Length of bed: 6400mm

Headstock
Spindle bore diameter: 80mm; optional 105mm
Number of spindle speeds: 12 steps
Range of spindle speeds: 23-1300 rpm
Spindle nose: A1-8
Optional: A2-8 for 105 mm bore
Optional: D1-8, D2-8
Optional: A2-11 for 105 mm bore

Carriage
Width of Carriage: 670mm
Cross slide travel: 400mm
Top slide travel (compound slide): HG-660/800:150 mm
Top slide travel (compound slide): HG-760/840:240 mm
Tool shank: 25x25mm

Tailstock
Diameter of barrel: 80mm
Travel of barrel: 200mm
Taper of barrel: MT5

Threads
Lead screw diameter & pitch: 45mm diameter x 12mm pitch/1.77” diameter x 2 TPI
Range of metric pitches: 0.8-14 mm
Range of imperial pitches: 2-28 TPI
Range of diametrical pitches: 4-56 DP
Range of module pitches: 0.5-7 MP

Feeds
Feed rod diameter: 32mm
Range of longitudinal Feeds: 0.05-0.7 mm/rev
Range of cross Feeds: 0.025-0.35 mm/rev

Motor
Main spindle Motor: 10HP (optional 15HP)
Coolant pump Motor: 1/8HP

Denver LA Series lathes are Denvers small compact precision lathes. Available in the following sizes;
Swing: 460 & 560
Between Centres: 500, 750, 1000, 1500 & 2000mm

-One piece Meehamite casting machine base.
-Metric & inch gear box with full range of inch, metric, DP, MP threading and multiple threads, all
function is reached without change gear.
- Apron enforced oil supply with safety device is used to avoid collision.
- Bed ways & face of compound rest have been ultra-frequency treated & ground with longer
life.
- Cross way feeding guides screw: 2 points support for heavy cutting.
- Length safety foot brake.
- Dynamically balanced alloy spindle by 3 point support.
- The gears in headstock and spindle are hardened & precision ground.

Capacity
(LA-460) Swing over bed: 460mm
(LA-560) Swing over bed: 560mm
(LA-460) Swing over cross slide: 280mm
(LA-560) Swing over cross slide: 380mm
Distance between centres: 500/750/1000/1500/2000mm

Bed
(LA-460) Swing over gap: 680mm
(LA-560) Swing over gap: 780mm
Width of Bed: 317mm
Width of gap (spindle end face) 210mm
(500) Length of bed: 1490mm
(750) Length of bed: 1740mm
(1000) Length of bed: 1990mm
(1500) Length of bed: 2490mm
(2000)Length of bed: 2990mm


Headstock
Spindle bore diameter: ø52
Numbered of spindle speeds: 8 steps
Range of spindle speeds : 80-1400 rpm.
Spindle nose: ASA A1-6

Carriage
Width of Carriage: 485mm
Cross slide travel: 250mm
Top slide travel (Compound Slide): 125mm
Tool shank: 20x20mm

Tailstock
Diameter of barrel: Ø52
Travel of barrel: 140mm
Taper of barrel: MT4

Threads
Lead screw diameter & pitch: Dia 35mm/Pitch 6mm & Dia 1" x 4 T.P.I
Range of metric pitches: 0.2 - 14 ( 41Nos )
Range of imperial pitches: 2 - 56 T.P.I. (37Nos )
Range of diametrical pitches: 8-44 D.P. ( 21Nos )
Range of module pitches: 0.3-3.5 M.P. (18Nos)

Feeds
Feed rod diameter: 22mm
Range of longitudinal Feeds: 0.04 - 1.0 mm/rev
Range of cross Feeds: 0.02- 1 mm/rev

Motor
Main spindle Motor: 5HP (Optional 7.5 HP)
Coolant pump Motor: 1/8 HP