• Ballscrews

    For efficient moving of high loads - with maximum efficiency
  • Type F Carry ballscrews

    Developed for the highest performance, designed for the lowest price.
  • Tailor-made ballscrews

    Your revolutionary idea - our tailor-made solution: any nut shapes and end processing

Nut types (shapes)

  • Bild

    Nut with mounting thread
    Type FG…

    • cost-effective standard nut
    • outer diameter turned
    • with pin wrench hole

     

  • Bild

    Cylindrical nut
    Type ZY…

    • outer diameter ground
    • with keyway

     

  • Bild

    Flange nut
    Type FB… / FA…

    • mounting section and flange ground (Type FB…)
    • drilling pattern 1/2/3 following DIN 69051
    • flange type C on request

     

Ball return systems

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    End cap ball returns
    Type …E / …F

    • also for over-square pitches (p ≥ d0)
    • wipers firmly integrated into end caps
    • made of high-Performance technopolymer
    • cost-effective

     

  • Bild

    Tube ball return
    fully integrated into nut body
    Type …R

    • for heavy loads
    • can also be used in high temperatures
    • space-saving in length

     

  • Bild

    Single-thread ball return
    Type …I

    • space-saving in diameter
    • made of high-Performance technopolymer
    • other materials (e.g. brass) on request

     

Design features

Carry screws are made using the highly economical cold-rolling process, offering – at a significant price advantage – precision that has so far only been achieved with ground screws.
Carry screws are combined with individual steel nuts which are produced in a unique, highly efficient process.

Carry ballscrews offer all the advantages that are characteristic
of ballscrews, such as:

  • high efficiency (η > 0.9), i.e.
    low drive power
    low self-heating
  • high load ratings
  • low-friction, stick-slip-free operation
  • minimum wear, i.e. with consistent positioning precision,
    very good repeat accuracy is achieved
  • high reliability and long service life

Load ratings Cdyn and Cstat
The dynamic and static load ratings of Eichenberger ballscrews are determined on commonly used and recognised DIN calculation bases.
According to our experience, higher values are usually achieved during practical applications.

Materials

  • standard: steel
    1.3505 (100 Cr6)
    1.1213 (Cf53)
  • on request: corrosion-resistant steel 1.4034 (X46Cr13)
    other materials
    on request: coating for corrosion protection

Lead accuracy

  • standard:
    G9 ≤ 0.1 mm/300 mm (in accordance with DIN 69051)
  • on request:
    G7 ≤ 0.052 mm/300 mm
    G5 ≤ 0.023 mm/300 mm

Reduced backlash
Reduced backlash up to ≤ 0.01 mm is possible, if required (only
for paired screw and nut units or those that have been mounted).

Efficiency
Efficiency η for Carry ballscrews is more than 0.9

Operational temperatures
During normal use: –20 to +80 °C.
Different operational temperatures after consultation.

Wipers
Depending on the type, technopolymer wipers (K) or brush wipers (B) can be mounted. Felt rings (F) on request (for lifetime lubrication).

Carry ballscrews offer all the advantages that are characteristic
of ballscrews, such as:

  • high efficiency (η > 0.9), i.e.
    low drive power
    low self-heating
  • high load ratings
  • low-friction, stick-slip-free operation
  • minimum wear, i.e. with consistent positioning precision,
    very good repeat accuracy is achieved
  • high reliability and long service life

Load ratings Cdyn and Cstat
The dynamic and static load ratings of Eichenberger ballscrews are determined on commonly used and recognised DIN calculation bases.
According to our experience, higher values are usually achieved during practical applications.

Materials

  • standard: steel
    1.3505 (100 Cr6)
    1.1213 (Cf53)
  • on request: corrosion-resistant steel 1.4034 (X46Cr13)
    other materials
    on request: coating for corrosion protection

Lead accuracy

  • standard:
    G9 ≤ 0.1 mm/300 mm (in accordance with DIN 69051)
  • on request:
    G7 ≤ 0.052 mm/300 mm
    G5 ≤ 0.023 mm/300 mm

Reduced backlash
Reduced backlash up to ≤ 0.01 mm is possible, if required (only
for paired screw and nut units or those that have been mounted).

Efficiency
Efficiency η for Carry ballscrews is more than 0.9

Operational temperatures
During normal use: –20 to +80 °C.
Different operational temperatures after consultation.

Wipers
Depending on the type, technopolymer wipers (K) or brush wipers (B) can be mounted. Felt rings (F) on request (for lifetime lubrication).

  • Abstreifer K
  • Abstreifer B
  • Abstreifer F

Production / Handling / Lubrication

Production lengths
In general, Eichenberger screws are produced as threaded rods
with a length of 3 m.

Any kind of end machining
Ballscrew ends are without any machining cut by grinding (standard).
Upon request, a so-called standard screw end journal with three turned bearing seats is available. Dimensions are as per customer specifications.

Screws may also be ordered with softened ends for subsequent
finishing by the customer.

Our speciality is any application-specific end machining: Tell us
your requirements, and we’ll provide YOUR tailor-made screw!
In each instance, a detailed drawing would be necessary.

Radial loads and torque
Radial loads or torque brought to bear upon the nut result in overload of individual contact surfaces, thus seriously affecting the service life of the ballscrew assembly. Therefore it is important to properly mount the screw and to comply with all relevant form and positional tolerances.

Handling
Ballscrews are precision parts and must be protected from shock, dirt or moisture when transported or stored. Please do not unpack until ready for use.
Please check for cleanness when mounting the ballscrew. Dirt or
foreign matter on the ball race – especially inside the nut – may cause increased wear and premature failure.

Lubrication

The usual specifications for lubricating ball bearings also apply to ballscrews. However, lubrication applied only once but intended to last a lifetime is not sufficient in most cases. Regular lubrication is required to extend the service life of the ballscrew.

When shipped, screws simply have a protective film. Before mounting or operating the ballscrew, units must be lubricated with the proper lubricant (through the lube hole for nuts with wipers; directly onto the screw for nuts without wipers).

Recommended all-purpose lubricant:

  • Klüber Microlube GBU Y 131

When using another lubricant, please verify compatibility with anticorrosion agent; otherwise rinse ballscrew unit Prior to lubrication.

Do not use grease containing graphite or MoS!

Surface coatings
… possible on request:

  • generally to reduce sliding friction
  • if lubrication is not possible (e.g. in the food industry)
  • as corrosion protection

Assembling of ballscrew units

Montage von Kugelgewindetrieben
Montage von Kugelgewindetrieben

1. Remove transport lock (O-ring) on one side.

Please keep sleeve and nut in horizontal position. Otherwise, the nut may slide from the sleeve and balls may fall out of the ball race. In the event such incident does occur, balls must be properly re-inserted to prevent damage to or blockage of the ballscrew. If in doubt, please contact Eichenberger Gewinde AG.

2. Insert screw end into mounting sleeve.

Attention: Operator must be able to advance sleeve up to the thread intake. Otherwise, balls may fall out of the ball race and damage or block the unit.


3. Gently turn nut onto the screw.

Please consult lubrication recommendation before mounting or operating ballscrews.

Calculations

The following are the relevant calculations which underlie screw design and safe operation.
For detailed information on ballscrew design, please refer to DIN 69051.

«Suitability test» rotational speed characteristics

When selecting a ballscrew it is important to first ensure that the correct nut design for the ball return system required to support the maximum rotational speed demanded by the application is used (independent of the screw length).


nmax = maximum rotational speed [min-1]
d1 = outer screw diameter [mm]

Rotational speed characteristic [–] for:

  • single-thread ball return: 60 000 (Carry type …I )
  • tube ball return: 80 000 (Carry type …R )
  • end cap ball return: 80 000 (Carry type …E /…F )

Downloads for Carry ballscrews

pdf
pdf
pdf

Speedy

High-helix leadscrews
ø 4 … 36 mm
p 4 … 200 mm

Rondo

Round-thread leadscrews
ø 6 …16 mm
p 2 … 5 mm

Easy

Light leadscrews
ø 20 mm
p 80 mm

Individual thread drives

Find the right standard thread drive

Carry Ballscrews
Speedy High-helix leadscrews
Easy Light leadscrews
Rondo Round-thread leadscrews
Cylindrical nut
Type ZY...
Nut with mounting thread
Type FG...
Flange nut
according to drawing

Individual tailor-made thread drives

  • application-specific nut shapes, including integrated additional features such as axles, mounting surfaces etc.
  • individual thread profiles and customised ball sizes, e.g. for increased load ratings
  • application-specific screw diameters and end machining
  • special materials and coatings

and much more

Further information

What we are doing

We develop, produce and market innovative linear power transmission products – lead and ball screws with cold-rolled threads – designed specifically to address the needs of potential OEM applications.
read more

Next trade fair date

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Motek, Stuttgart, Germany
hall ... stand ...