JHC-20S Centerless Grinder (Servo motor)

 
Machine may be shown with optional accessories.

 

FEATURES: 
  • Machine main chassis is made of high-grade cast iron FC-30 melted by advanced induction furnace then cast by resin cores. It is heat treated by normalizing procedure prior to machining to ensure greater stability and rigidity
  • Wheel spindle is made of SNC-21H, Ni-Cr-Mo alloy steel and case-hardened, carbonized, and then sub-zero degree treated by computerized controlled installation. Surface hardness is more than HCR 62º for a dept of over 1.5mm. Hardness at hub is about HRC 30º, resistance to wear and not easily deformed.
  • Servo motor regulating wheel can be adjusted to ideal linear speed. Constant linear speed while diameter of regulating wheel changes to maintain superior accuracy and grinding finish
  • Lubrication system for hydraulic dressing and enforced spindle lubrication. The oil tank is located outside of machine for easy maintenance. Two layers of filter plus pressure regulator to ensure the cleanness of lubrication oil and oil film thickness consistency to extend wheel spindle life span and accuracy
  • Wheel dressing device is made of FC-30 cast iron and precision ground. It is driven by hydraulic system with stepless speed regulator for easy and steady dressing operation. 
MACHINE INCLUDES: 
  1. Grinding wheel and grinding wheel flange
  2. Regulating wheel and regulating wheel flange
  3. Flange extractor
  4. Diamond tool
  5. Standard thrufeed workrest and blade
  6. Standard infeed workrest and blade 


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Specifications

A. MACHINE
Model: JHC-20S Centerless Grinder (Servo motor regulating wheel)
B. CAPACITY
01) Standard work rest (diameter): 0.039” ~ 1.97” (1 ~ 50 mm)
02) Special work rest (diameter): 1.57” ~ 3.94” (40 ~ 100 mm)
C. WHEEL
03) Grinding wheel size (dia. x width x hole): 20” x 8” x 10” (510 x 205 x 254 mm)
04) Regulating wheel size (dia. x width x hole): 12” x 8” x 5” (305 x 205 x 127 mm)
05) Grinding wheel speed: 1,350 rpm
06) Regulating wheel speed: 10 ~ 250 rpm variable speed (Servo motor)
07) Regulating wheel tilt angle: +5º ~ -3º
08) Regulating wheel swivel angle: ±5º
D. FEED
09) Regulating wheel feed on handwheel per graduation: 0.05 mm
10) Regulating wheel feed on handwheel per revolution: 3.5 mm
11) Regulating micro feed on handwheel per graduation: 0.001 mm
12) Regulating micro feed on handwheel per revolution: 0.1 mm
13) Table feed on handwheel per graduation: 0.05 mm
14) Table feed on handwheel per revolution: 9 mm
15) Table micro feed on handwheel per graduation: 0.001 mm
16) Table micro feed on handwheel per revolution: 0.2 mm
17) Dressing handwheel per graduation: 0.01 mm
18) Dressing handwheel per revolution: 2 mm
E. POWER
19) Grinding wheel motor: 20 HP
20) Regulating wheel motor: 4 HP (Servo motor)
21) Hydraulic pump motor: 1 HP
22) Coolant pump motor: 1/2 HP
F. WEIGHT & DIMENSIONS
23) Shipping dimensions (LxWxH):: 113” x 54” x 71”
24) Floor space (approx.) (LxWxH): 91” x 77” x 61”
25) Net weight: 7,055 lb.
26) Gross weight: 7,715 lb.
Design and specifications subject to change without notice.