Unused GU20 X 40NC High Precision Cylindrical Grinder NC Controlled Series

Unused GU20 X 40NC High Precision Cylindrical Grinder NC Controlled Series The spindle of SB Machine Tool's NC Controlled Cylindrical Grinder, GU20 × 40NC, runs on precision bearings, assuring maximum spindle stability. It guarantees outstanding accuracy for external and internal diameter grinding and face grinding. The machine bed is manufactured from high quality cast iron, specially heat treated and precision machined to ensure deformation-free performance, year after year. 1 Stable and Rigid Spindle Head (1) The spindle runs on precision bearings assuring maximum spindle stability. It guarantees outstanding accuracy for external and internal diameter grinding and face grinding. (2)The spindle head swivels +90°~-30°. (3)The spindle head on the 20 series machines provides variable speed changed by frequency inverter. (4)The spindle head on the 32 and 42 series is driven by servomotor providing variable speed. 2 Precision Wheel Head (1) The grinding wheel spindle is precision machined from high quality alloy steel SNCM-220 normalized tempered carburized and sub-zero treated precision ground and mirror-effect treated. Hardness reaches to over HRC 62°. No deformation maximum wear resistance and lifetime accuracy are assured. 3. Special Hydrostatic Bearing (1) The wheel spindle runs by using a special hydrostatic bearing and is especially ideal for precision grinding work. It features high speed no friction between metals no heat generation deformation-free extra high accuracy and continual use. 4. Advanced Hydrostatic Lubrication System (1) The slideways of the table and the wheel head are lubricated by an advanced automatic hydrostatical lubrication system. This provides various features such as extremely smooth movement added feed accuracy and superior grinding accuracy. Standard Accessories: 1. Grinding Wheel and Flange (1 set) 2. Diamond Tool Holder (Table mounted type) (1 pc) 3. Tool and Kits (1 set) 4. Carbide Tipped Work Centers (2 pcs) 5. Coolant Equipment (1 set) 6. Hydraulic Pump with Tank (1 set) 7. Work Lamp (1 pc) SPECIFICATIONS GU20 x 40NC Capacity Distance Between Centers 400 mm Swivel Over Table 200 mm Max.Load of Centers 60 kg Max. External Grinding Diameter 160 mm Wheel Head Swivel Angle ±30° Manual Distance 135 mm Auto Rapid Advance 25 mm Sliding Seat Supplementary Displacement 95 (total 255 mm) Min. Setting Unit 0.001 mm One Turn of Handwheel (graduation) 2 (0.005) mm NC Feed Range 0 ~ 99 mm Grinding Wheel O.D x Width x I.D 305 x 38 x 127 Speeds (belt-type) RPM 2085 / 2495 Work Spindle Head Swivel Angle 120° (+90° , -30°) Spindle Speeds (variable) RPM 16 ~ 450 Tailstock Stroke 20 mm Table Swivel Angle -3°, +12° Traverse Speed 50 ~ 4000 mm/min Auto. Reciprocate Min. Stroke 8 mm Feed of One Turn of Handwheel (2-step) 20 mm (2mm) Motor Wheel Spindle 2.1 kw (4P) Work-head Spindle 0.75 kw (4P) (Inverter) Hydraulic Pump 0.75 kw (6P) Wheel Spindle Lubrication Pump 0.18 kw (2P) Coolant Pump 0.18 kw (2P) Internal Grinding Spindle 0.375 kw (2P) Tank Capacity Wheel Spindle Lubricant Tank 12 L Hydraulic Fluid Tank 65 L Coolant Tank 100 L Machine Weight kgs 2000 kg