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Ball screws
Rolling screw drives that convert rotary motion into linear motion with high efficiency, precision and positioning repeatability.
Ball screws from ELTMAR
In a ball screw, balls roll between the screw thread and the nut and circulate in a closed loop. This gives the drive high efficiency, low friction and very little wear compared with a trapezoidal lead screw.
We offer rolled and ground screws in various accuracy classes, with single or preloaded nuts. We machine the journals to the customer’s drawing and supply complete assemblies with bearing supports.
Availability
Popular versions always in stock
Consulting
+48 790 280 320
[email protected]
Quality of Ball Screw Assemblies
A ball screw assembly is a mechanism that uses ball bearings as rolling elements to convert rotary motion into linear motion, or vice versa. In practice, the requirements for these assemblies – as well as their available configurations – are highly diverse.
Advantages of ball screw assemblies:
- Efficiency of up to 98%
- Extended service life due to virtually wear-free operation; rolling friction results in only minimal energy loss
- Low drive power requirements
- Minimal temperature rise, thanks to rolling friction and high efficiency
- Precise positioning
- High travel speeds
- Absence of the “stick-slip” effect (jerky, intermittent motion)
Versions, range and material
We offer ball screw assemblies manufactured via whirling (hard whirling technology), grinding, and rolling; these products are characterized by tight lead tolerances and excellent surface quality.
Our nut designs comply with the DIN 69051 standard; we also fulfill orders for custom configurations tailored to specific client requirements.
Every assembly undergoes a thorough inspection and is supplied with a quality test report.
Ball Screw Assembly Range
- Diameter: 4–125 mm (smaller and larger diameters available upon request)
- Lead: from 1 mm
- Length: up to 10 m (lengths exceeding 10 m available upon request)
- Right-hand and left-hand threads
- Tolerance classes from T3 according to DIN 69051 (ground, whirled, or rolled)
Material
Ball screw assemblies are manufactured using high-quality materials sourced from Europe. Standard materials include:
- Ball screw: 42 CrMo4V / 50 CrMo4 / CF-53 (material numbers: 1.7225 / 1.7228 / 1.1213)
- Ball nut: 100Cr6 / 15 CrNi6 / 16 MnCr5 (material numbers: 1.3505 / 1.5919 / 1.7131)
Design
What a ball screw consists of and what determines its operating parameters.
Screw
Shaft with a rolled or ground thread.
Nut
Flanged or cylindrical, with ball recirculation.
Balls and recirculation
Rolling instead of sliding friction – high efficiency.
Journals and supports
End machining for fixed and floating bearing arrangements.
Fields of use
- Machine tool feed axes
- Electromechanical actuators
- Positioning tables
- Presses and assembly equipment
- Special-purpose machines
Selection parameters
- Axial load and required service life
- Lead and linear speed
- Accuracy class and axial play
- Screw length and bearing arrangement
- Critical speed and buckling
Comparison of versions
Indicative overview – the final choice depends on the application parameters.
| Feature | Rolled | Ground |
|---|---|---|
| Lead accuracy | standard | high |
| Cost | lower | higher |
| Lengths | long sections | to order |
| Typical use | automation, handling | machine tools, precision positioning |
Variants and versions
- Rolled
- Ground
- Flanged nuts
- Preloaded nuts
- Journal machining to drawing
- Bearing supports
How we select
Enquiry
You send us the application parameters, a drawing or the part number.
Analysis and selection
We check loads, service life and operating conditions and propose options.
Quotation
A specific offer with price and delivery date.
Delivery and support
We deliver the complete set and stay in touch during assembly and commissioning.
Frequently asked questions
Can’t find your question here? Call us: +48 790 280 320
Ball screw or trapezoidal screw?
A ball screw offers much higher efficiency, service life and precision. A trapezoidal screw is cheaper and self-locking, and works well at low speeds.
Do you machine journals to drawing?
Yes – to the customer’s drawing or with standard ends for bearing supports.
How do I choose the lead?
Based on the required linear speed, motor speed and the positioning resolution needed.
Enquiry: ball screws
Give us the parameters you know – we will clarify the rest by phone. You can also send a drawing to [email protected].
+48 790 280 320
Company headquarters
- ul. Strzelców Bytomskich 13B lok. 7
- 44-109 Gliwice, Poland
Contact details
Elements of Linear Technique for Machinery Automation Robotics
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