Sonak Surface Technologies Pvt Ltd

We are specialized in Grinding various types of Rolls to close geometric tolerance on precision German grinding machines.

a) Concentricity : 3 micron (depends on roller construction)

b) Cylindricity : 3 micron (depends on roller construction)

c) Taper : 2-3 micron per meter (depends on roller construction)

d) Camber Profile: 2-3 micron station to station variation.

• 1850 mm X 6500 mm L  

• 900 mm  X 10000 mm L

• 25 tons weight capacity.

With an infrastructure of 3 Roll Grinding machines and 5 Cylindrical Grinding machines, we can grind Calendar Rolls, Work Rolls, Back Up Rolls, Dryer Cylinder, Rams, Calendar Rolls for PVC, Granite Rolls, Rubber Rolls etc.

We have over 40 years of extensive experience in Hard Chrome Plating Rolls/ Dies of various sizes and base materials.

We have world class technical know-how through our 3 technical collaborations.

We can HCP upto:

• 2000 mm X 4000 mm L

• 900 mm  X 10000 mm L

• 350 mm  X 15000 mm L,

• 20 Tons weight capacity.

• 1,25,000 Amp Rectifier Capacity.

We can Hard Chrome Plate, Work Roll, Auto Dies, Mass Quantity Jobs, Centerless Bar Hard Chrome Plating, PQF Mandrel Bars, Dryer Cylinders, Baskets, Baffles for Chemical Industrial, Calendar for PVC, Doctor Roll, Super Calendar Rolls, Rams, Tie Bars, Metering Bar, T- Dies, Crane Booms etc.

Heavy Rolls turning:  - We can turn heavy rolls upto 25 tons,  1400 mm X 8000 mm Lg.

Typical jobs include Steel Mill Back Up Rolls, Dryer Cylinder, Long Shaft Etc.

We have high precision German Super Finishing Machine to achieve high gloss mirror finish subsequent to the grinding operation. We use special abrasive tools to reduce peak to valley height and impart High Gloss Mirror Finish to the Roll resulting in a surface finish of 0.005 Micron Ra Value on the Roll.

Maximum Capacity : 524 mm X 6000 mm L, 25 Tons Weight Capacity.

We have a special infrastructure for fabrication of Single/ Double Jacket Rolls in Mirror Finish/ Matt Finish for various applications ranging from Heating / Cooling / Coating / Lamination / Calendaring Etc.

Uniform temperature gradient across the roll: - For heating/ Cooling Rolls our special internal construction ensures very low temperature gradient across the entire barrel length of the Roll, resulting in uniform quality and thickness of sheet/film passing between the Rolls.

Hard Chrome Plating: - We have over 40 years experience coupled with technology from German consultant, to deliver you the best quality Hard Chrome Plating, of 62-65 HRC hardness & good corrosion resistance.

Roll Surface Hardening: - Using specialized techniques we produce a roll with a shell hardenss of 60 HRC & shell depth of 8 mm.

Grinding: - We grind your Rolls on precision German machines to produce geometric tolerances in the range of 3-5 microns.

Matt Finish: - We can produce different surface roughness values (Ra Values ranging from1-4 microns) in dull/ bright finish, using different parameters in Sand Blasting.

Mirror Finish: - Using specialized German Machine we can produce high gloss (lusture) mirror finish of Ra value 0.005 microns.

Embossing: - We can produce different embossed finishes on the Roll surface ranging from Knurled/ Diamond Etc.

Dynamic Balancing: - We use special manufacturing techniques to ensure that the fabricated Rolls are dynamically balanced to close tolerances, resulting in vibration free running.

Using the above specialized manufacturing techniques, we can Manufacture / Repair various Rolls for the following Industries: -

Coating Line: - Single/ Double Jacket Heating / Cooling Winding Core Idler Roll/ Guide Roll	BOPP: - Chill Roll Stretcher Roll MDO Roll Winding Core Ozone Corona Treatment	Polyester: - Chill Roll Winding Core Idler Roll / Guide Roll
Sheet Line: - Polishing Rolls Screw Barrel Idle Roll/ Guide Roll	Flooring: - Calander Roll Take off Roll Idler Roll/ Guide Roll Single/ Double Jacket- Heating/ Cooling Roll	Lamination Line: - Single/ Double Jacket Heating / Cooling Idler Roll/ Guide Roll
Inspection Moulding Machine: - Tie Bar Ram Dies	Laminate / Sunmaica: - Doctor Roll/ Squeezing Roll/ Impregnation Roll	Tape/ Yarn Line: - Godet Roll Idler Roll/ Guide Roll
PVC: - Calender Roll Take Off Roll	Press Manufacturer: - Hydraulic Ram