GN 491Double Tube Linear Actuators

Double Tube Linear Actuators

with Right or Left Hand Thread, Single Slider

GN 491

Catalogue
d1
l1
l1 Max. stroke
Shaft thread
b
d2
d3**
d4***
d5
d6
d6
For screw
DIN 912
d7
GN 491-18-100-L1-SCR
18
100
420
TR10x3
28
6
-
M 5
5.3
-
-
-
GN 491-18-150-L1-SCR
18
150
420
TR10x3
28
6
-
M 5
5.3
-
-
-
GN 491-18-200-L1-SCR
18
200
420
TR10x3
28
6
-
M 5
5.3
-
-
-
GN 491-18-250-L1-SCR
18
250
420
TR10x3
28
6
-
M 5
5.3
-
-
-
GN 491-30-100-L1-SCR
30
100
1500
TR14x4
50
8
M 6
M 6
6.5
9
M 5
10.5
GN 491-30-150-L1-SCR
30
150
1500
TR14x4
50
8
M 6
M 6
6.5
9
M 5
10.5
GN 491-30-200-L1-SCR
30
200
1500
TR14x4
50
8
M 6
M 6
6.5
9
M 5
10.5
GN 491-30-300-L1-SCR
30
300
1500
TR14x4
50
8
M 6
M 6
6.5
9
M 5
10.5
GN 491-40-100-L1-SCR
40
100
2650
TR20x4
60
12
M 8
M 8
8.5
13.5
M 6
13.5
GN 491-40-150-L1-SCR
40
150
2650
TR20x4
60
12
M 8
M 8
8.5
13.5
M 6
13.5
GN 491-40-200-L1-SCR
40
200
2650
TR20x4
60
12
M 8
M 8
8.5
13.5
M 6
13.5
GN 491-40-300-L1-SCR
40
300
2650
TR20x4
60
12
M 8
M 8
8.5
13.5
M 6
13.5
GN 491-50-100-L1-SCR
50
100
2760
TR20x4
72
12
M 10
M 8
8.5
13.5
M 8
13.5
GN 491-50-150-L1-SCR
50
150
2760
TR20x4
72
12
M 10
M 8
8.5
13.5
M 8
13.5
GN 491-50-200-L1-SCR
50
200
2760
TR20x4
72
12
M 10
M 8
8.5
13.5
M 8
13.5
GN 491-50-300-L1-SCR
50
300
2760
TR20x4
72
12
M 10
M 8
8.5
13.5
M 8
13.5
GN 491-60-300-L1-SCR
60
300
2740
TR25x5
80
14
M 10
M 10
10.5
13.5
M 8
16.5
GN 491-60-400-L1-SCR
60
400
2740
TR25x5
80
14
M 10
M 10
10.5
13.5
M 8
16.5
GN 491-60-500-L1-SCR
60
500
2740
TR25x5
80
14
M 10
M 10
10.5
13.5
M 8
16.5
** usable depth of thread from both sides min. 2 x d3*** usable depth of thread min. 1,5 x d4

Types

  • Type R1: Right hand thread, shaft journal at one end
  • Type R2*: Right hand thread, shaft journal at both ends
  • Type L1*: Left hand thread, shaft journal at one end
  • Type L2*: Left hand thread, shaft journal at both ends

* usually not available from stock

Guide tubes DIN 2391

Steel, chrome-plated SCR

End pieces / Slider

Aluminum

  • Powder coated

Black, RAL 9005, textured finish

  • Fixing surface / mounting surface

Machined, plain finish

Spindle with trapezoidal thread

  • Steel, plain finish
  • With ball-bearing
  • Positioning accuracy ±0.2 mm/300 mm travel

Follower nut

Gun metal

Socket cap screws DIN 912

Steel, zinc plated

Hex nuts DIN 985

Steel, zinc plated

Self-locking with polyamide ring

In addition to the standard travel lengths specified in the above table for the double tube linear actuator GN 491 any length inside the maximum travel length is available.

In order to measure the movement and positioning of the sliders, digital position indicators can be added.

  • Installation Kits GN 491.1  (for Position Indicators)

Horizontal with screws for thread d4 or bore d5

 

Vertical

From outside, with screws for thread d3

From inside, with screws for bore d6

From inside, with screws for bore d5 / d7

 

Mounting with screws for thread d4 or bore d5

 

Usage of installation kit, position indicator and handwheel

 
 
dFx in NFy in NFz in NMx in NmMy in NmMz in Nm
--l = 500l = 1000l = 1500l = 500l = 1000l = 1500---
18425215110-10580-223540
308501100900550600350150100100100
4011003700280014002100600180150140170
5019003850240021003100700200180220290
602700690005700510063002800360320350500

The specified forces Fy and Fz cause a flexure of the guide tube of approx. 0.5 mm.

Description

The slider is moved via a bearing-type trapezoidal thread spindle and a guide nut. The slider is guided through two parallel chrome-plated tubes, resulting in a high load capacity and allowing high bending moments to be compensated by the linear actuator.

For type GN 492 , a second slider and an adapter plate extend the options for applications.

These double tube linear actuators have been designed for manual operation (handwheel). With the appropriate lubrication, they can also absorb rotary spindle speed of as much as 250 rpm.

The positioning accuarcy is 0.2 mm / 300 mm travel, the maximum revers play is 0.1 mm.

To measure the adjustment or the positioning, digital position indicators DD52RDD51DD52R-EDD51-E may be attached. The required extension of the shaft journal is enabled by installation kits GN 491.1.

 

Double Tube Linear Actuators GN 491 / GN 492  with right or left hand thread, single shaft end or two shaft ends.

Related products
Double Tube Linear Actuators

GN 492

Double Tube Linear Actuators with Right or Left Hand Thread, Double Slider
Disc handwheel Ø 100

GN 923.30

Disc handwheel Ø 100 for linear actuators Ø 30
Without handle

GN 9234-A

Handwheels Aluminum, Powder Coated, for Linear Actuators
Spoked handwheel Ø 140

GN 924.50

Spoked handwheel Ø 140 for linear actuators Ø 50