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Optimum Structural Design
Following years of research and development Chester slant bed CNC lathes offer unique rigidity. The design concept behind the CH-20 and CH-26 series is to enhance heavy duty machining, precision and stability. With its excellent machine structure, you can handle heavy cutting with more ease than ever before.
• 45o slant bed construction assures solid support of turret and efficient chip removal.
• Massive base construction combined with advanced honey comb rib reinforcement minimises vibration while upgrading structural rigidity and stability.
• The entire machine construction is heavier than competitive models for outstanding stability.
• Box ways on X and Z axes, slide way surfaces are hardened, precision ground and coated with Turcite B for maximum wear resistance.
• Extra wide slide ways on X and Z axes for increased stability during machining.
• All major structural parts are manufactured from high quality Mehanite cast iron and tempered to relieve stress for lifetime deformation free operations.
• Cs axis function is available as an option enabling turning, drilling, grooving and milling functions to be performed in one setup.
Quality Features Throughout Assure Greater Value
• 10/12 Position Turret
• The turret is compactly constructed and combined with bidirectional random tool selection for quick tool change.
• Tool change time is quickly accomplished in only 0.6 seconds.
• The 10 position turret accommodates 25x25mm O.D. tools and 40mm I.D. tools.
• The 12 position turret accommodates 20x20mm O.D. tools and 32mm I.D. tools.
Programmable Tail stock
• The ruggedly constructed, programmable tail stock and quill movement can be controlled on the control panel for easy setup and accurate positioning.
• Tail stock movement is driven by the turret slide.
Complete Oil Fluid Separation
• In addition to the oil fluid separation design on X and Z axes, the cutting fluid tank is specially designed with a labyrinth construction to fully exhaust the floating oil. This assures no oil mixes with the cutting fluid.
• Double filters in the fluid tank ensure clean recirculated fluid.
Optional Tool Pre-Setter
• The tool pre-setter effectively reduces cutting tests while saving machining time.
• The mechanism is used for measuring tool diameter and length.
• The tool adjustment arm is powered and program controlled.
Optional Power Turret
• Equipped with VDI 30 power turret to ensure the most excellent machining results.
• Driven by Fanuc (L2) spindle motor.
Optional Cs Axis Function
• Cs Axis + live system, suitable for turning, drilling and milling functions.
• Siemens/Fanuc Controller
• Chip Conveyor and Chip Bucket Cart.
• Pedal Switch for Chuck Opening
and Closing
• Work Lamp
• Coolant System
• Heat Exchanger
• MT4 Rotating Centre
• Soft Jaws and Hard Jaws
• Toolset and Box
• Manual
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Capacity |
No of control axis |
2 Axis |
2 Axis+Cs axis |
2 Axis |
2 Axis+Cs axis |
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Swing over bed |
Ø630mm (24.8") |
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Standard turning diameter |
H10....Ø230mm (90.5")/H12....Ø300mm (11.81")/V12….Ø200mm (7.87") |
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Maximum turning diameter |
H10….Ø300mm (11.81")/H12….Ø340mm (13.38")/V12….Ø250mm (9.84") |
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Work length |
H10….580mm (22.83")/H12….600mm (23.62")/V12….Ø590mm (23.23") |
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Headstock and Main Spindle |
Spindle nose, Internal taper |
A2-6, Ø69 Taper 1/20 |
A2-6, Ø81 Taper 1/20 |
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Spindle bore |
Ø65mm (2.56") |
Ø78mm (3.07") |
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Bar capacity |
Ø52mm (2.04") |
Ø65mm (2.56") |
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Hydraulic power chuck |
Ø210mm (8") |
Ø254mm (10") |
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Range of spindle speed |
45-4500 r.p.m |
35-3500 r.p.m |
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Front bearing ID of spindle |
Ø100mm (3.937") |
Ø120mm (4.724") |
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Cross-slide (X axis) and Carriage (Z-axis) |
Cross slide travel (X-axis) |
H10….Ø190mm (7.48")/H12….Ø207mm (8.15")/V12….Ø220mm (8.66") |
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Longitudinal travel (Z-axis) |
H10….590mm (23.23")/H12….610mm (24.02")/V12….600mm (23.62") |
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AC servo motor (X-axis) |
1.6kW 8N.m ~ FANUC 8/3000i |
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AC servo motor (Z-axis) |
3.0kW 12N.m ~ FANUC 12/3000i |
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Dia. of ball screw (X-axis) |
Ø32mm (1.26") P5 C3 |
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Dia. of ball screw (Z-axis) |
Ø40mm (1.57") P10 C3 |
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Rapid traverse speed (X-axis) |
15 m/min (590 ipm) |
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Rapid traverse speed (Z-axis) |
20 m/min (787 ipm) |
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Cutting feed rate (both axes) |
0.001 ~ 500 mm/rev |
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Hydraulic Turret |
Tool station (Random) |
H10….10 tools/H12….12 tools/V12….12 Tools |
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Tool shank |
H10….25mm/H12….20mm/V12….20mm |
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Boring bar diameter |
H10….Ø40mm (1.575")/H12….Ø32mm (1.26")/V12….Ø32mm (1.26") |
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Programmable Tailstock |
Quill diameter |
Ø85mm (3.346") |
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Quill travel |
120mm (4.72") |
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Taper of centre |
MT. No. 4 |
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Tailstock travel |
550mm (21.65") |
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Motor |
Main spindle (continuous rated) |
STD.AC9kW (12hp) OPT. ACT11kW (15hp) |
STD.AC11kW (15hp) OPT.AC15kW (20hp) |
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Main spindle (30 min rated) |
STD.AC11kW (15hp) OPT.AC15kW (20hp) |
STD.AC15kW (20hp) OPT.AC18.5kW (25hp) |
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Hydraulic oil pump |
2.2kw (3hp) |
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Coolant pump |
375kw (0.5hp) |
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Power turret |
V12….AC 2.2kW (3hp) |
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Tank Capacity |
Hydraulic Tank |
65 Litre (14.3 gal.) |
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Coolant Tank |
180 Litre (39.6 gal.) |
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Measurement |
Weight Approx. |
5200kg |
5500kg |
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Machine sizes |
Length |
3850mm |
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Width x Height |
1565mm x 1910mm |
STANDARD ACCESSORIES
• Siemens/Fanuc Controller
• Chip Conveyor and Chip Bucket Cart.
• Pedal Switch for Chuck Opening and Closing
• Work Lamp
• Coolant System
• Heat Exchanger
• MT4 Rotating Centre
• Soft Jaws and Hard Jaws
• Toolset and Box
• Manual
OPTIONAL ACCESSORIES
• Auto Door
• Transformer
• Tool Pre-Setter
• Collet Chuck
• Parts Catcher
• Auto Bar Feeder and Interface
• Air Blow System for Chuck Cleaning
• Power Turret
• Cs Axis Function
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