Single-coat cooling rollers
Double-coated cooling rolls with steel coating
Double-coated cooling rolls with stainless steel coating

Single-coat cooling rollers

1200 mm

Diameter

10000 mm

Length

550 mm

Wall thickness

0,05 – 0,5 mm

Radial run-out

Diameter: 100 – 1200 mm
Bale length: 1000 – 10000 mm
Wall thickness: 5 – 50 mm
Typical materials: all common steels and stainless steels
Typical radial runout accuracy: 0.05 – 0.5 mm based on the total length
Typical surface: turned, belt grinded, chrome-plated, rubberized, Anti-adhesion coating
Balancing: static or dynamic in all standard balancing qualities according to DIN ISO 1940
Pressure test: according to specification, usually with water

We manufacture this type of cooling roller with coatings, made of stainless steel or steel, whereby the steel rollers are usually given a coating for protection against corrosion. If we use our stainless steel guide roll production for the cooling rollers, the typical dimensions and geometric tolerances mentioned there, also apply to wall thicknesses of 2 – 5 mm.

The bottom-shaft units are mostly manufactured in welded construction, less often as screw construction. The water drainage can be designed on both sides as well as on one side with internal water return.

Depending on the requirements, the thick-walled roller sleeves are turned inside out in order to obtain a uniform wall thickness across the width and circumference. As a rule, however, this is not desired, since the best compromise between price and function is often in the foreground in the case of single-coat construction.

If the dimensions and tolerances permit, we therefore recommend our cooling rollers made of calibrated stainless steel tube, because a uniform wall thickness is guaranteed, since the sheet metal coat is not turned.

Double-coated cooling rolls with steel coating

1200 mm

Diameter

4000 mm

Length

3 – 50 mm

Wall thickness

0,05 – 0,5 mm

Radial run-out

Diameter: 200 – 1200 mm
Bale length: 1000 – 4000 mm
Wall thickness outer coat: 3 – 50 mm
Wall thickness inner coat: 8 – 50 mm
Typical materials: all common steels and stainless steels
Typical radial run out accuracy: 0.05 – 0.5 mm based on the total length
Typical surface: turned, belt grinded, chrome-plated, rubberized, Anti-adhesion coating
Balancing: static or dynamic in all standard balancing qualities according to DIN ISO 1940
Pressure test: according to specification, usually with water

The use of double-coated cooling rolls is necessary, if a defined cooling of the web with minimal deviation of the temperature over length and width is important in the production process.

Due to the forced guidance of the cooling water in a helical channel, which is formed between the inner and outer coat of the cooling roller, the surface temperature of the cooling roller or the heat transfer to the web can be set very precisely. Depending on the requirement profile, the water ducts are arranged in co current or counter current. The internal structure of the cooling rollers can be specified by the customer or designed by our specialists according to the specified boundary conditions. On request, we can create the mechanical and thermal design of your cooling roller(s) including recommendations for rotary unions and roller bearings.

The materials used are again steel and stainless steel as a welded construction or with screwed pin base units.

Double-coated cooling rolls with stainless steel coating

1200 mm

Diameter

4000 mm

Length

3 – 5 mm

Wall thickness

0,1 – 0,5 mm

Radial run-out

Diameter: 200 – 1200 mm
Bale length: 1000 – 4000 mm
Wall thickness outer coat: 3 – 5 mm
Wall thickness inner coat: 8 – 20 mm
Typical materials: all common steels and stainless steels for the Inner body, outer coat usually made of 1.4301 or 1.4404
Typical radial run out accuracy: 0.1 – 0.5 mm related to the Overall length
Typical surface: turned, belt grinded, Anti-adhesion coating
Balancing: static or dynamic in all industry-standard Balancing qualities according to DIN ISO 1940
Pressure test: according to specification, usually with water

A speciality is cooling rollers with an inner body made of black steel and a thin-walled stainless steel outer coat. The outer sheaths are rounded from 3 – 5mm thick stainless steel sheet and shrunk warm onto the inner body without internal processing. The outer coat adapts to the shape of the inner body and after finishing, this coat has a very uniform wall thickness. With this design, we achieve radial run out accuracies of 0.1 – 0.5 mm and are therefore able to offer a double-coated cooling roller at a very good price-performance ratio, which can be used in many production processes. The decisive advantage: The surface of the cooling roll is 100% corrosion-protected without subsequent coating. The usual, expensive and time-consuming chrome plating is completely eliminated.