GN 509.1 Ball transfer units, Steel / Stainless Steel, with collar

Size	d₁ Ball	d₂ ±0,08	d₃	h₁ ±0,3	h₂ ±0,3	h₃ ±0,3	h₄	Load C in N Types SBL	SNI	NNI

12	12,7	22	27	17	8	4	3,2	200	150	150
15	15,8	24	30	20	8,1	3,5	1	500	400	400
22	22,2	36	45	30,5	9,8	5	2,4	1300	1000	1000
30	30,1	45	55	36,8	13,8	7	4,5	2500	2000	2000
45	44,4	62	75	53,5	19	9,5	5,5	6000	4500	4500
60	60	100	117	77,5	30	15	10	13000	10000	10000

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.

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)

Part Number

Weight: 0,036 kg

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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 quantity discounts.

With a total value (net) per order:
from 175,00 Euro -> 10 % discount
from 275,00 Euro -> 20 % discount
from 375,00 Euro -> 30 % discount
With a total value (net) per order:

Quantity

All prices in accordance with our price list No. 52, valid from 1 May 2019, plus VAT only valid for Germany.