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3.1 An overview of linear guideways

An overview of linear guideways

The SCHNEEBERGER range of linear guideways offers you perfect solutions for your specific applications.

Assessment of the advantages

R

R

RD

RD

RN

RN

RNG

RNG

N/O

N/O

M/V

M/V

Type R RD RN RNG N/O M/V
For features and dimension table, see chapter 5.1 5.1 5.2 5.3 5.4 5.5

Parameter: displacement force & high level of smoothness

Rolling element R RD RN RNG N/O M/V
- balls ++++ ++++ n/a n/a n/a n/a
- rollers +++ +++ +++ +++ n/a n/a
- needles n/a n/a n/a n/a ++ ++

Parameter: High loading capacity

Rolling element R RD RN RNG N/O M/V
- balls + + n/a n/a n/a n/a
- rollers ++ ++ +++ +++ n/a n/a
- needles n/a n/a n/a n/a ++++ ++++

Legend

++++ best choice | + good choice | n/a not available

Performance parameters

Parameter R RD RN RNG N/O M/V
Maximum acceleration in m/s², without cage control 50 50 50 50 50 50
Maximum acceleration with cage control in m/s² n/a n/a 300 300 200 200
Maximum speed in m/s 1 1 1 1 1 1
Maximum speed with cage control in m/s n/a n/a 1 1 1 1
Quality classes see chapter 9.1
Operating temperature in °C -40 to +80 -40 to +80 -40 to +80 -40 to +80 -40 to +80 -40 to +80

Material (standard)

Component R RD RN RNG N/O M/V
Rail
tool steel, hardness in HRC		 58-62 58-62 58-62 58-62 58-62 58-62
Rolling element
tool steel, hardness in HRC		 58-64 58-64 58-64 58-64 58-64 58-64

Material (corrosion-resistant)

Component R RD RN RNG N/O M/V
Rail
tool steel, hardness in HRC		 min. 54 min. 54 min. 54 min. 54 min. 54 min. 54
Rolling element
tool steel, hardness in HRC		 min. 56 min. 56 min. 56 min. 56 min. 56 min. 56

Special versions

Note: The following special versions do not apply in respect of every rail cross-section or every rail length. For details and technical information, see chapter 7.

Special versions Order code(5) R RD RN RNG N/O M/V
Precision in special quality(1) SQ ✓ ✓ ✓ ✓ ✓ ✓
Precision in super special quality(1) SSQ ✓ ✓ ✓ ✓ ✓ ✓
Linear guideways made of corrosion-resistant steel(2) RF ✓ ✓ ✓ ✓ ✓ ✓
Run-ins rounded EG ✓ ✓ ✓ ✓ ✓ ✓
Prepared for roller cage type EE EE ✓ ✓ n/a n/a n/a n/a
Multi-part linear guideways ZG ✓ ✓ ✓ ✓ ✓ ✓
Pair of height-matched guideways HA/EHA ✓ ✓ ✓ ✓ ✓ ✓
DURALLOY® coating(3) DU ✓ ✓ ✓ ✓ ✓ ✓
DryRunner coating(4) DR n/a n/a ✓ ✓ n/a n/a
Cage control FORMULA-S KS n/a n/a ✓ ✓ n/a n/a
Cage control KZST n/a n/a n/a n/a ✓ ✓
Various versions of fixing holes V, G, D ✓ ✓ ✓ ✓ ✓ ✓

Notes

  1. SQ / SSQ: There are limitations relating to corrosion-resistant steel, coatings and maximum rail length.
  2. RF:
    • Maximum rail length is limited (in normal quality as well as in options SQ and SSQ)
    • Hardness of the steel is reduced to a min. 54 HRC, which affects the service life of the linear guideway
  3. DU (DURALLOY): The special versions ZG and SSQ are not possible; special quality (SQ) only on request.
  4. DryRunner: supports operation without lubricant; the additional use of the option «cage control FORMULA-S» is recommended due to increased cage creep; options ZG and SSQ cannot be supplied; option SQ only on request; there are limitations concerning maximum rail length; not available for sizes RN/RNG 9 and RN/RNG 12.
  5. Order reference, see p.139(5)
ESC