GN 509.4 Heavy Duty Ball Transfer Units Steel, without Flange

Heavy Duty Ball Transfer Units GN 509.4: Steel, without Flange

Overview of Types of Ball Transfer Units Technical Instructions

Product description

Heavy duty ball transfer units GN 509.4 are used in machine and fixture construction, for example, to move heavy loads in any direction without great effort. The roller bearing of the ball ensures reliable operation and a long service life.

The turned housing is especially sturdy and permits higher load values. A mounting hole created as a circular pocket accepts the diameter d₂ radially, while the floor of the pocket receives the applied load axially.

Specification

Housing
SteelS, turned
Zinc plated, blue passivated fnish

Load ball
Steel, Plain finishBL

Bearing balls
Steel, plain finish

RoHS

GN 509.4 Steel Heavy Duty Ball Transfer Units, without Flange sketch

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Part Options / Table

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Dimensions in: Inch (change to Metric)

Part Number	Size	d₁ Load ball	d₂ ±0.003	d₃ Sheet steel cover	h₁ ±0.012	h₂ ±0.012	h₃	Load rating C

509.4-8-SBL	8	0.31	0.709 ±0.003	0.71	0.472 ±0.012	0.079 ±0.012	0.20	26.98 lbf (120 N)
509.4-12-SBL	12	0.50	0.866 ±0.003	0.87	0.689 ±0.012	0.217 ±0.012	0.30	44.96 lbf (200 N)
509.4-15-SBL	15	0.62	0.945 ±0.003	-	0.787 ±0.012	0.197 ±0.012	-	112 lbf (500 N)
509.4-22-SBL	22	0.87	1.437 ±0.003	-	1.181 ±0.012	0.236 ±0.012	-	292 lbf (1300 N)
509.4-30-SBL	30	1.19	1.756 ±0.003	-	1.449 ±0.012	0.295 ±0.012	-	562 lbf (2500 N)
509.4-45-SBL	45	1.75	2.465 ±0.003	-	2.106 ±0.012	0.512 ±0.012	-	1349 lbf (6000 N)

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Metric

Dimensions in: Inch (change to Metric)

Size	d₁ Load ball	d₂ ±0.003	d₃ Sheet steel cover	h₁ ±0.012	h₂ ±0.012	h₃	Load rating C

8	0.31	0.709	0.71	0.472	0.079	0.20	26.98 lbf (120 N)
12	0.50	0.866	0.87	0.689	0.217	0.30	44.96 lbf (200 N)
15	0.62	0.945	-	0.787	0.197	-	112 lbf (500 N)
22	0.87	1.437	-	1.181	0.236	-	292 lbf (1300 N)
30	1.19	1.756	-	1.449	0.295	-	562 lbf (2500 N)
45	1.75	2.465	-	2.106	0.512	-	1349 lbf (6000 N)

Build & Price

Arrangement and Size Selection


When determining the size of the ball transfer units, it is necessary to consider not only the weight but also the size and nature of the base area of the load. The maximum distance between the ball transfer units „a₂“ (assuming a flat base area) is calculated by dividing the shortest edge length of the load by 2.5. This ensures that the load always rests on the ball transfer units, preventing it from tipping over into the spaces between them. The required load capacity of the ball transfer units is calculated by dividing the weight of the load by 3. This results from the assumption that, due to tolerances of the load base area and the ball transfer units, only three ball transfer units are normally used.

a₁ = Shortest edge length of the load a₂ = Max. distance between ball transfer units a₂ = a₁/2.5						F₁ = Load weight F₂ = Load per ball transfer unit F₂ = F₁/3

Speed and Friction

The permissible conveying speed is up to 2 m / sec. With larger ball transfer units at speeds exceeding 1 m / sec., depending on the load weight, an increase in temperature must be expected.

The friction values of the ball transfer units are about 0.005 µ at a speed of 1 m / sec. However, this value is subject to large variations depending on the operating conditions.

Compared to ball transfer units with steel sheet housing (GN 509), those with solid steel housing (GN 509.1) have a higher rigidity. In this case, the static values of steel balls can be applied.

Lubrication is recommended as protection against corrosion. The general rolling bearing regulations can be applied. In most applications, lubrication can be dispensed with.

Temperature Resistance

Ball transfer units from size 36 upwards are fitted with a felt seal as protection against ingress of dust and dirt. With this version, the max. operating temperature is 212 °F (100 °C) for balls made of steel.

Ball transfer units without felt seal can also be used at higher temperatures. However, this will lead to a reduced load rating (C). The following guide values apply:

257 °F (125 °C) ./. 10 %
302 °F (150 °C) ./. 20 %
338 °F (170 °C) ./. 30 %
392 °F (200 °C) ./. 50 %

The max. operating temperature for ball transfer units with plastic ball is 140 °F (60 °C).

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Part Number

Total (net)

Can$9.95

Delivery time 5-7 days: 862
Contact for delivery time >862

Quantity

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Please note our quantity discounts (Canadian Dollars).

Min	Max	Price
1	49	Can$9.95
50	99	Can$9.12
100	249	Can$8.29
≥ 250		Can$7.46

Prop 65: Not compliant

WARNING:
Cancer and Reproductive Harm - www.P65Warnings.ca.gov

RoHS: Compliant

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)).

Weight: 0.039 lbs

If weight is not listed, please contact our Sales Department for additional information regarding weight.
Phone: 1-800-397-6993