Stop Bolts GN 251.2

Type: S - Normally open

Operating Instruction GN 251.2 Strength Values of Screws IP Protection Classes

Product description

Stop bolts GN 251.2 are supplied with a hardened spherical head that serves as an end stop.

The two hex nuts allow exact positioning with counter-locking.

When the workpiece contacts the bolt head, the built-in limit switch transmits an electrical control signal.

By means of the knurled screw, the limit switch can be installed and removed without need for loosening the stop bolt.

Specification

Bolt
Steel

Property class 5.8
Hex head hardened to HRC 45
Nickel plated

Hex nuts
Steel, nickel plated

Toothed washer
Steel, zinc plated

Limit switch

Voltage: 5 - 24 V DC
Recommended switching current: 5 - 10 mA
Max. switching current: 20 mA DC
Life expectancy: 3 million operations
Operating temperature
+14 °F to +176 °F (-10 °C to +80 °C)
Load: ≈ 0.2 lbf (1 N)

Supply cable
Polyvinyl chloride (PVC)

Ø 3 mm, 2-core, ≈ 2 meters long
Max. tensile load: 6.7 lbf (30 N)
Gray for Type S
Black for Type O

Protection class IP 40

RoHS

Accessory

Mounting Blocks GN 412.1 (Zinc Die-Cast)

Part Number	d	l₁	e	k	l₂ max.	l₃	s

6N21CZB/S	M 6	0.83	0.45	0.16	0.12	0.14	0.39
6N21CZB/O	M 6	0.83	0.45	0.16	0.12	0.14	0.39
8N25CZB/S	M 8	0.98	0.59	0.28	0.16	0.20	0.51
8N25CZB/O	M 8	0.98	0.59	0.28	0.16	0.20	0.51
10N25CZB/S	M 10	0.98	0.77	0.28	0.16	0.24	0.67
10N25CZB/O	M 10	0.98	0.77	0.28	0.16	0.24	0.67

d	l₁	e	k	l₂ max.	l₃	s

M 6	0.83	0.45	0.16	0.12	0.14	0.39
M 8	0.98	0.59	0.28	0.16	0.20	0.51
M 10	0.98	0.77	0.28	0.16	0.24	0.67

l₁

l₂
max.

l₃

M 6

0.83

0.45

0.16

0.12

0.14

0.39

M 8

0.98

0.59

0.28

0.16

0.20

0.51

M 10

0.98

0.77

0.28

0.16

0.24

0.67

Selected Part

Part Number

Total (net)

Can$272.89

Available within 1-2 weeks

Quantity

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Please note our quantity discounts (Canadian Dollars).

Min	Max	Price
1	49	Can$272.89
50	99	Can$250.15
100	249	Can$227.41
≥ 250		Can$204.67

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: 0.176 lbs

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