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Tube.

Picture
Load Diagram for Steel Tubes.
  • statically evenly distributed load
  • maximum curvature of 0.5 mm in the middle of the tube
  • maximum permissible material tension 120 N/mm2
  • for RL < 300 mm, the material tension is the determining factor
  • for RL > 300 mm the curvature
  • for a point load, for example in pallet transport, the load capacity shown in the diagram should be multiplied by a factor of 0.6
  • for stainless steel tubes, you should allow for a safety margin because if the lower load capacity
Picture
Picture
Tube Types

Steel Tubes
Material                                  :welded steel precision tube made from hot-band steel, with/without weld seam filed away
Tolerance                                :according to DIN:2394
Quality                                    :St:37.2 according to DIN:1710
Straightness                           :according to manufacturer approx 0.25% of the measured length 
Note                                        :special seamless tube is not supplied according to previous standards

Stainless Steel Tubes
Material                                   :welded stainless steel precision tube (AISI 304)
Tolerance                                :according to DIN 2463 D2/T3
EUR material code number  :1.4301
Straightness                           :according to manufacturer, approx 0.25% of the measured length

Steel Tube Galvanisation
Galvanisation Method          :electrolytic
Zinc Layer                              :for indoor use 5 to 8 um, for outdoor use 12 to 15 um (on request)
                                                Note galvanisation takes place after the tube has been worked, due to the quality requirements.

Steel Tube fitted with PVC or Rubber covering
The PVC or rubber covering is glued onto a sanded tube.  The seam will be sealed closed where possible.  The purpose of the covering is to protect the product to be transported against damage, to achieve more grip or to prevent inappropriate materials from sticking to the roller.  There are lots of sorts of PVC and rubber coverings, each with different characteristics.  We will be glad to advise you and help find the best possible solutions for your particular situation. 

Steel Tube fitted with PVC hose
The PVC hose os blown around a tube with compressed air.  The aim is mostly to protect the product to be transported against damage, to achieve more grip for transporting the product or to prevent inappropriate materials from sticking to the roller,
Material                               :soft PVC, hardness +/- 70 shore
Material Thickness             :standard stock 3 or 5 mm
Temperature range            :- 30'c to 70'c
Resistance to weathering :good
Resistance to UV               :fair
Colour                                :Grey
Tube Diameter                  :deliverable in 40mm, 50mm , 60mm and 80mm dia

Powered Coated Steel Tube
In powder coating a polyester coating is applied to the tube ny ,eats of electrostatic charge.  The whole object is the heated to 200'c in a curing oven, causing the powder particles to met and flow together into a single homogenous covering layer.  This is done to prevent rusting.
Characteristics                    :impact and scratch resistant, long-lasting, easy to clean and environ environmentally friendly.
Layer Thickness                  :from 60 to 150 um
Colour                                  :standard is mid grey, but can also be delivered in all other RAL colours
Temerpature Range            :-10'c to 70'c without risk of discolouration (short periods unto 150'c)
Resistance to weathering  :good
Resistance tp UV                :excellent
Outdoor Use                      :for outdoorr configurations, we recommend two layers or a galvanised underlayer.

Rilsan-coated Steel Tube
Risen coating is the application of a layer of Super polyamide 11 on a tube that has been sanded and brought to a high temperature.  This creates a tough, flexible, impact resistant, hardwiring and corrosion resistant layer.  Risen coatings are used primarily when the roller is to come into contact with foodstuffs and drinking water.
Layer Thickness        :between 300 and 400 um
Colour                        : MAC 5161 (mid grey)
Temperature Range :-65'c to 100'c (short periods unto 140'c)

Teflon-Coated Steel Tube
Teflon coating is the application of a covering layer of fluorocarbon on a finely sanded steel tube.  Depending on the end use, this can be based on PTFE, FEP or PFA.  The result is a layer that very little sticks too and that is moreover comically never enough inert.  Fluorocarbon coverings are primarily used for "non-stick" and chemically resistant coverings.  They are used in the food, tobacco, pharmaceutical and chemical industries.
Layer Thickness            :at least 35 um
Colour                            :normally black
Temperature Range     :-50'c to 280'c
Picture
Load diagram for Plastic Tubes
  • statically evenly distributed load
  • maximum curvature of 0.5mm in the middle of the tube
  • E = 1500 N/mm2 (the calculated values have been cut off at a given maximum, since no guarantees can be given at higher loads)
  • If a point load cannot be avoided, the load capacity given in the diagram should be multiplied by 0.6
  • permanent distortion can occur with static loads
SPINDLES
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  • Home
  • About
  • ROLLERS
    • CHOOSING A ROLLER >
      • LOAD, LENGTH AND PITCH
      • STANDARDS AND TOLERANCES
      • MATERIAL SPECIFICATIONS >
        • TUBES
        • SPINDLES
        • Order Examples
      • COVERINGS >
        • PVC
        • RUBBER
      • GROOVED BEARINGS
    • PRODUCTS >
      • BALL BEARING ROLLERS
      • GRAVITY AND SLIDE BEARING ROLLERS
      • POWERED ROLLERS
      • TROUGHED IDLERS AND DRUMS >
        • Troughed Idlers
        • Drum Rollers
      • CONICAL ROLLERS
      • 24v MOTOR ROLLERS >
        • Driven Rollers
        • Control Cards
        • 24v MOTOR EXPLAINED
      • Accessories
  • Contact
    • NDW NL
    • ALSO Group BE
  • NEWS