Surface Grinder


  • Vibration-free and noiseless working.
  • Precised engineering and simple easily accessible controls mean time saving anc accurate operation.
  • The Grinding Accuracy on the machine is Guranteed and controls of the machine are withing the easy reach of the operator.

Kg/CM'G SYN-175 SYN-225 SYN-250 SYN-300
Working Surface 175x350 225 x 450 250 x 500 300 x 600
of the Table (mm)        
Magn. Chuck size 150x300 200 x 450 200 x 500 200 x 500
Max. height from 250mm 275mm 300mm 300mm
table to Grind.Wheel        
Vertical Feed Gradu. 0.01 0.01 0.002 0.002
Cross Feed Gradu. 0.05 0.05 0.05 0.05
Size of Grindingl 175x13x 200x13x 200x13x 200x13x
Wheel 31.75mm 31.75mm 31.75mm 31.75mm
Spindle Speed RPM 2800 2800 2800 2800
Ele. Motor H.P. 0.75 1 2 2

Hydraulic Surface Grinder


  • The working table executes only longitudinal movements, This ensures full contact and support from the machine bed, even in the table limit position. V and flat guide ways are laminated with Turcite'B'to guarantee smooth table movement regardless of the load on the table.
  • The column carries out only cross feed movements, this guarantees uniform contact between the column slide and machine bed in any column position. The column slide is guided by box type Turcite 'B' laminated ways, hand scraped to obtain smooth stick slip free movements.
  • Vertical slide ways and the grinding wheel, creating a perfectly perpendicular movement of the spindle in relation to the working table, The housing construction is also designed for better rigidity.
  • The cartridge type spindle is supported by class 7 super(CP4) precision angular contact ball bearings, preloaded and select-fitted into spindle cartridge. This will guarantee a maximum run out of 0.002mm for stable and accurate grinding, All the spindles are assembled at Prayosha skilled and experienced technicians in temperature-controlled clean room. The result is a spindle that will provide years of trouble-free service with minimum temperature changes, noise or vibration.
MODEL SYN 2040 SYN  2060 SYN 2448 SYN 2460
 Max. Table Size (mm) 500 x 1000 500 x 1500 600x 1200 600x 1500
Max. Longitudinal Travel (mm) 1075 1575 1275 1575
Max. Cross Traverse (mm) 550 550 650 650
Max. Spindle Center Height above Table (mm) 750 750 750 750
Speed AND Feeds
Max. Table Speed (m/min) 18 18 18 18
Power Cross Traverse (m/min) 1000 1000 1000 1000
Auto Cross Feed at each Table reversal (infinitely variable) (mm) 0.5 to 10 0.5 to 10 0.5 to 10 0.5 to 10
Least Count of vertical feed head wheel (mm) 0.002 0.002 0.002 0.002
Size of Grinding wheel (mm) 300x 50x 76.2 300x 50x 76.2 300x 50x 76.2 300x 50x 76.2
Power of spindle motor (HP) 5 5 5 5
Speed of grinding spindle (RPM) 1400 1400 1400 1400
Working Pressure (Kg/cm) 20 20 20 20
Motor (HP) 5 5 5 5
Tank capacity (Ltrs) 150 150 150 150
Machine height (mm) 2150 2150 2150 2150
Floor space (mm) 2900x 2100 3850 x 2100 3300x 2300 3850x 2300
Net weight (Kg) 5500 6500 6500 7000

Hydraulic Cylindrical Grinder


  • BED Made of high grade cast iron provided with strong ribs for rigidity and a large Inverted prismatic Guide and Wide track, For the table. All the guide ways are carefully hand scrapped to ensure high accuracy.
  • TABLE Is composed of two parts. Upper table can be swivelled and set easily on either sides by means of set screw and scale. Table slide is hydraulically operated. And cross slide is Hydro mechanically operated.
  • WORK HEAD : The work head is swivelled type to grind angular as well as conical jobs. Itis built forgrinding both with revolving and stationery centers.

Hydraulic Surface Grinder Model 300 450/600/1000
Max.Grinding Length 300 mm 450/600/1000
Max. Height of Center 100 mm 125 mm
Range of Table feed per min 0.05 / 1.5 0.05 / 1.5
Max. Table Swivel 7+2 =9 6+2=8
Hydraulic Power Motor 1 H.P./0.75KW 1 HP./0.75 KW
Work Head Swivel on 45 towards wheel head  
Work Head Speed Range (3) 75,150, 350 (3) 60,120,250
Work Head Motor 0.5 HP/ 0.37 KW 0.5 HP/0.37 KW
Size of Grinding Wheel 350x25x 127 350x38x 127
Min. Dia.of Worn Out Wheel 250mm 250mm
R.P.M. of Grinding Wheel 1900 1900/2100
Wheel Head Motor 2 HP/1.5. KW 3 HP/2.25. KW

Centerless Grinder


  • BED Made of high grade cast iron provided with strong ribs for rigidity and a large Inverted prismatic Guide and Wide track, For the table. All the guide ways are carefully hand scrapped to ensure high accuracy.
  • DESIGN: designed to grind cylindrical parts at high production rates and close tolerances straight shoulders & taper parts can be gropund with equal ease suitable for hardened and unhardened steel, brass , copper, alluminium, or anyother materials.
  • GRINDING WHEEL HEAD: The grinding wheel spindle is made of hardened and ground nickle chrome alloy steel. It runs in oil chamber on Taper roller bearing or on bush as required. They are sturdy and strong enough to permit heavy duty grinding at high speeds and assure superior surface finish & accuracy.

Model SYN-75 SYN-100 SYN-150
Grinding range Dia. 2-75 2-100 5-150
Grinding Wheel 350x 100x127 350x150x127 500 x200x304.
Regulating Wheel 225x 100x76.2 225x 150x76.2 300x200 x127
Max Len. in infeed grinding 100mm 150mm 200mm
Max Len in through feed 300 x 75 250x 100 200x 150
Grinding Wheel Speed 1800 RPM 1800 RPM 1200 RPM
Regulating Wheel Speed 20-40-60 20-40-60 Inf. Variable
Grinding Wheel Motor 5 HP 7.5 H.P 20 H.P
Regulating Wheel Motor 1 HP 1 H.P 1 H.P
Coolant Pump Motor 0.15 0.15 0.50
Hydraulic Power Pack 0.5 0.5 0.5