Linear components
Besides complete linear units with nut and/or controller (system) we can offer you a wide range of components to build your own linear system.
Slider Units - Rapid Guide Screw (RGS)
Rapid Guide Screw Datasheet (294kB)
The Kerk RGS is a new screw-driven slide that offers exceptional linear speed, accurate positioning, and long life in a compact, value-priced assembly. The length and speed of the Kerk RGS is not limited by critical screw speed, allowing high RPM and linear speeds, even over long spans.
Standard leads include .100", .200", .500" and 1.00" travel per revolution. Many optional leads, both inch and metric based, offer everything from high efficiency to non-backdriving leads for vertical applications, eliminating the need for brakes. With Kerk's wide range of available leads, speeds of more than 60 inches per second (1.5 meters per second) are possible, rivaling belts and cables while offering superior positioning accuracy, repeatability and axial stiffness.
The Kerk RGS slide includes a precision aluminum guide and carriage and is driven by a precision rolled stainless steel lead screw. The moving surfaces include Kerkite™ high performance polymers running on Kerkote™ TFE coating.
The Kerk RGS has a unique, compact profile that provides exceptional torsional stiffness and stability for its size and weight. The integral mounting base allows support over the entire length if desired. Lengths up to 8 feet (2.4 meters) can readily be built, and longer lengths are possible on a special order basis.
Options
- additional driven or passive carriages can be added.
- application specific customization.
- linear guides without drive screw are also available.
Characteristics
- length and speed is not limited by critical scew speed
- repeatability
- axial stifness
- TFE coating
- wear compensating
- anti-backlash
- plug and play
Spindles
We can offer you the following spindles:
- Helix
- Ball-screw
- Trapezoidal
When do you use a Helix screw, a Ball-screw or a Trapezoidal screw?
Helix screws
These screws are selected for their price performance ratio. Some types have the unique possibility to reduce the axial play to almost zero, with a very low drag torque.
Some specific details:
- large pitch and small diameter combinations possible
- aluminum screws available
- zero backlash
- low noise
- special nuts possible
- smooth run with Teflon coating
- special materials on request
Ball-screws
Are mostly used for high load applications.
Some specific details:
- large diameters range (10mm to 200 mm) and long screws (up to 16 meter) are possible
- pitch range 4 to 63 (depending on diameter)
- high accuracy
- low noise
- no self locking
Spline Shafts
Kerk Spline Shafts Datasheet (294kB)
The Spline Shaft system has been designed for light load applications, where low cost, low friction and long life are primary design considerations.
The assembly consists of a light weight, aluminium spline shaft treated with Kerk's proprietary low friction TFE coating, mated with a graphite and PTFE filled thermoplastic bushing. The bushing is supplied with an integral brass collar to facilitate various mounting configurations without nut distortion.
Characteristics
- light weight (aluminium) construction
- TFE coating, mated with graphite and PTFE filled thermoplastic bushing
- integral brass collar
- anti-backlash assembly available
| Specifications |
|
|---|---|
| Straightness | .003" |
| Intolerance class | .002"to .003" |
Spindles - Helix lead screws
We offer lead screws from the supplier Kerk. Lead screws are specifically designed for motion control applications. They are not compromized adaptions of general purpose screws or nuts.
Characteristics
- custom sizes and leads can be special ordered
- hard metric and left hand threads
- 303 stainless steel
- produced with exclusive precision rolling process
- TFE coating
- maintenance free
- high pitch
| Specifications |
|
|---|---|
| Standard diameters | 1/8"(3,2mm) till 15/16"(23mm) |
| Standard leads | .02 till 3"(0,5mm till 76mm) |
| Positional bi-directional | within 50 micro inches (.0013mm) |
| Standard lead accuracy | available to .0001 in./in (mm/mm) + individual screw mapping optional (laser-interferometer verification) |
We offer 6 lead screws anti-backlash designs:
|
|
Style | Dynamic
load (N) |
Diameter
(mm) |
Description |
|---|---|---|---|---|
|
ZBX series (131kB) | 23 - 160
|
6,35 - 15,88 | self-lubricating polyacetal nut, precise positional accuracy and repeatability at a low cost |
|
ZBA series (94kB) | 23 - 160 | 6,35 - 15,88 | unique patented self-lubricating polyacetal nut can be adjusted for torque ranges |
|
KHD series (68kB) | 100 | 9,53 | for moderate load applications; delivers increased load capacity and greater axial stifness with low drag torque
|
|
NTB series (105kB) | 45 - 909 | 6,35 - 23,81 | self-compensating nut assembly maintains axial stifness throughout its life with minimum system drag torque. Easily modified for custom applications |
|
VHD series (83kB) | 680 - 1590 | 12,7 - 15,88 | revolutionary miniature designs for applications prevously off limits to lead screw technology. Available in NTB and NTG anti-backlash and B style general purpose configurations |
|
NTG series (71kB) | 680 - 1590 | 12,7 - 15,88 | delivers maximum load carrying capability, with highest axial and radial stifness |
|
B series (110kB) | 45 - 91 | 6,35 - 9,53 | compact anti-backlash assembly allows drag torque to be pre-set according to system requirements |
|
Mini series (67kB) | 200 - 2270 | 6,35 - 23,81 | for applications that do not require anti-backlash or wear compensation; long life at minimal cost |
Spindles - Ball screws
A ball screw is a mechanical drive that converts either rotary motion to linear motion or vice versa.As the balls are in rolling contact with precise ball races, an optimal efficiency (up to 98%) is achieved. For this reason ball screws are not self-locking like Acme screws. The efficiency of ball screws varies slightly depending upon whether torque is converted into force or vice versa.
HighDyn
Standard ball screws with high precision. Quality according to DIN-ISO 9001. When needed NAT spec. AQAP4 cold deformed brings you in a good price quality condition.
Characteristics
- longer life-time
- less wear
- less drive power required
- higher traversing speed
- no stick-slip effect
- less heat generation
- more precise positioning over total life
| Specifications |
|
|---|---|
| Precision | till 12N / 300 mm |
| Intolerance class | 0 - 7 |
Spindles - Trapezoidal screws & nuts
Trapezoidal Datasheet (489kB)
Trapezoidal screws are one of the motion converters to convert rotation into a linear movement. The thread has a trapezoidal shape and the nut is formed out of one piece of steel, bronze or plastic. Because of its simple thread shape and the minimum amount of parts, the price can stay low. This design needs most of the time lubrication to reduce friction between screw and nut. The same friction can also be used to establish self braking. This is a characteristic which can be used in lifting devices to establish a safe system.
Applications:
- lifting devices
- coordination tables
- entrance gate openers
- machine adjustments
- ventilation valves opener
Characteristics
- low-cost
- shock load resistant
- self braking if the pitch is 1/3rd of the diameter
- low noise level
| Specifications |
|
|---|---|
| Tolerances | DIN 103 - 7e |
| Material | standard C15, other material on request |
| Lead-direction | from Tr 10 x 2 till Tr 36 x 6 in right- and lefthand
from Tr 40 x 27 till Tr 60 x 9 in righthand from Tr 40 x 7 till Tr 60 x 9 lefthand on request |
| Delivery length | 1, 1,5, 2 and 3 m. Other length >3 m on request |
| Lead accuracy | 0,1/300 mm GK1
0,3/300 mm GK2 |
| Straightness | 0,8/1000 mm GK1
0,5/1000 mm GK2 |
Better classes and Machined ends on request
