Specification
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
Black, RAL 9005, textured finish
- Fixing surface / mounting surface
Machined, plain finish
Spindle with trapezoidal thread
- 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
Information
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.
Mounting facilities of the end pieces
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 facilities at the slider
Mounting with screws for thread d4 or bore d5
Assembly of position indicator and handwheel
Usage of installation kit, position indicator and handwheel
Technical description / Load capacity
| d | Fx in N | Fy in N | Fz in N | Mx in Nm | My in Nm | Mz in Nm |
| - | - | l = 500 | l = 1000 | l = 1500 | l = 500 | l = 1000 | l = 1500 | - | - | - |
| 18 | 425 | 215 | 110 | - | 105 | 80 | - | 22 | 35 | 40 |
| 30 | 850 | 1100 | 900 | 550 | 600 | 350 | 150 | 100 | 100 | 100 |
| 40 | 1100 | 3700 | 2800 | 1400 | 2100 | 600 | 180 | 150 | 140 | 170 |
| 50 | 1900 | 3850 | 2400 | 2100 | 3100 | 700 | 200 | 180 | 220 | 290 |
| 60 | 2700 | 69000 | 5700 | 5100 | 6300 | 2800 | 360 | 320 | 350 | 500 |
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 DD52R/ DD51/ DD52R-E/ DD51-E may be attached. The required extension of the shaft journal is enabled by installation kits GN 491.1.
Designs
Double Tube Linear Actuators GN 491 / GN 492 with right or left hand thread, single shaft end or two shaft ends.
