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GN 509.4 Ball Transfer Units Heavy Duty Steel-Housing, without Collar


GN 509.4 Ball Transfer Units, Heavy Duty Housing, without Collar

Product description


Ball transfer units GN 509.4 are used on conveyer tracks. They assist a linear or rotary movement of heavy loads on a conveyer track.

They have no support collar, taking the load at the housing diameter d2 instead.


Housing steelSBL
  • Turned
  • Zinc plated, blue passivated
  • Ball steel, blank


On request

Plastic balls (Polyamide)
Stainless steel balls
Stainless steel housings

Technical drawing

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GN 509.4 Ball Transfer Units, Heavy Duty Housing, without Collar sketch

Article options / Table

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d2 ±0.08d3
Sheet steel cover
h1 ±0.3h2 ±0.3h3Load C in N

Build & Price

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Size Größe

Arrangement and choice of ball size

When deciding on the size of the conveyer the following factors have to be taken into account: Weight, size, base material as well as the load to be carried.

The max. distance between the roller balls „a2 (on a plane surface) is arrived at by dividing the shortest edge length of the load to be conveyed by 2,5. This ensures that a load will always be supported by carrier balls thus preventing it from tipping over into an empty space.

The required load carrying capacity of the balls is determined by the weight of the actual load divided by three. This is arrived at from the assumption that, due to tolerances on the load carrying face and the spacing of the balls in general, only three balls will be under load at any one time.

Sketch GN 509

a1 = shortest edge length of the load

a2 = max. distance between roller balls

a2 = a1/2,5

F1 = Load weight

F2 = Load per roller ball

F2 = F1/3

Speed and friction

The permissible conveying speed is 2 m/sec. With larger roller balls at speeds exceeding 1m/sec., depending on the weight being conveyed, an increased temperature would be expected.

The friction values of the balls at a speed of 1 m/sec. will be in the region of 0,005 µ. This value is, however, dependent on application of usage and could be subject to large variations.

In comparison of balls with sheet metal housings (GN 509) with balls in heavy duty steel housing (GN 509.1), the latter have a higher rigidity. Hence the static values of balls in steel housing can be applied.

Lubrication to prevent corrosion is recommended. The general recommendations applicable to ordinary roller bearings will be sufficient. In most applications lubrication can be ignored.

Resistance to temperature

Balls from size 36 upwards are fitted with a felt seal as protection against ingress of dirt and dust. The latter have a max temperature of 100 °C only.

Balls without the felt seal can also be used at higher operating temperatures. This, however, will lead to a reduced conveying capacity (c). The following table gives indicative values:

125 °C ./. 10 %
150 °C ./. 20 %
170 °C ./. 30 %
200 °C ./. 50 %

The max. operating temperatur for ball transfer units with plastic ball is 60 °C.

Selected Part (How to order)

Total (net)
plus VAT 0,70 €
gross 4,36 €
In stock
Weight: 0,018 kg
If this article is new in our product range, it may happen that details concerning weight are as yet not listed.
If you do need weight details, please contact our Sales Department!
Phone +49 7723 6507 - 0
RoHS: Yes
This article is RoHS-compliant in application of Annex III., which means it complies with EU Directive 2011/65/EU, including extension (2015/863/EU), for restricting the use of certain hazardous substances in electrical and electronic devices. The Directive regulates the use of hazardous substances in devices and components. The implementation in national law is summarily described with RoHS(Restriction of (the use of certain) hazardous substances).
Please note our order discounts.
With a total value (net) per order:
from 175,00 € -> 10 % discount
from 275,00 € -> 20 % discount
from 375,00 € -> 30 % discount

Surcharge for small volume purchases:
-> 15,00 Euro
for value of goods less than 25,00 €
-> 10,00 Euro
for value of goods from 25,00 to 50,00 €
All prices in accordance with our price list No. 55, valid from 1 September 2022, plus VAT only valid for Germany.

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Our service team is available from Monday to Friday between 7:00 AM and 5:30 PM: +49 7723 6507 - 0

To the customised elements | To the contact persons

GN 509.4-8-SBLGN 509.4-12-SBLGN 509.4-15-SBLGN 509.4-22-SBLGN 509.4-30-SBLGN 509.4-45-SBL

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