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Basic knowledge of Rubber Rollers (10,11)

10.Rubber roller handling

- For taking a good care of rubber rollers -

(1) Instruction for transport

  1. Using a solid wooden box is desirable.
  2. Attach a rope to the shafts or attach a wide belt at the center when lifting a roller.
    Avoid attaching chains or a wire to the rubber surface.
    It is advisable to protect the bearing parts to avoid damages.
  3. When using hoist equipment, be careful of lubricating oil flying off onto a rubber roller surface.
    In case it happens, wipe it off immediately.

(2)Instruction for storage

  1. When storing a rubber roller, hold at the shafts or stand the roller upright.
  2. Rubber rollers should be stored at cool and dark places.
    Do not store them near electrical equipment such as a motor and a germicidal lamp which generate ozone.
  3. We recommend re-polishing rollers which have been stored for more than 6 months.
    Wrapping the rubber roller surface with paper will slow down the surface oxidation.
  4. For large and heavy rollers with soft rubber material, rotate the rollers at regular intervals to avoid curving or bending.

(3) Instruction for use

a.Pressure and speed
In general, the maximum load capability on a rubber roller is 100 kgf/cm in linear pressure but it varies greatly depending on the rotation speed, the rubber materials, the rubber hardness, the rubber thickness, the temperature, the iron core construction, the chemicals and so on.
Depending on the operating condition, the maximum load capability can be designed for more than 100 kgf/cm.
If a roller is used at high speed and/or with large load, we recommend a roller core with a structure which can be water cooled so that water cooling can remove heat, so called hysteresis heat, which is generated when a rubber is being nipped.

Avoid rapid heating.
The maximum highest temperature for use of each rubber material are shown oncharacteristics of each rubber gradebut heat resistance of the adhesive layer is lower than rubber material's. If a roller is used under high temperature, the roller should be cooled down from inward of the roller core.

c. Chemicals
The chemical properties of each rubber material for the most part are shown oncharacteristics of each rubber gradeIf a roller is used in a special condition, please supply us the chemicals in use so that Katsura will select the suitable rubber material.

d.Mechanical Factors
Wear-out of a bearing, an axis and a gear, unfair loading and machine shaking cause over wear-out of a rubber surface or shortening of a roller life time.
Care should be taken for these factors. The same care should be taken for an unbalanced roller or a deflected roller.

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11.How to order rubber rollers

Rubber rollers are widely used in all types of industries for many purposes. Ordering the most suitable rollers for a specific purpose will contribute to your product quality, rationalization, cost reduction and etc. The most important point is to give the manufacturer detailed information about for what purpose and under what conditions you plan to use the rollers. When placing an order, please make use of the following table for your reference.

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