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BOSCH REXROTH
R044229341


$112.75 USD
  • BOSCH REXROTH
  • Material:R044229341
  • Model:MWA-012-SNS-C0-H-0

Quantity in stock: 0

Note: Sales tax, and shipping will be calculated at checkout.
***Disclaimer: The following summary contains information gathered from various sources such as product descriptions, technical specifications and catalogs. While efforts have been made to provide accurate details, inaccuracies may occur. It is advised to verify all information by contacting Bosch Rexroth directly.***
The Bosch Rexroth MINI R.BLOCK NRII (R044229341) is a high-precision miniature ball runner block designed for smooth, quiet linear motion in applications requiring compact and corrosion-resistant components. This model boasts an SNS size format, indicating a slimline width, normal length, and standard height, which makes it suitable for space-constrained environments. The runner block body is constructed from corrosion-inert steel to ensure longevity and resistance to harsh conditions. Featuring a preload class C, this MINI R.BLOCK NRII is preload-free, allowing for ease of movement without any initial tension. The high accuracy class H reflects its capability to maintain precise positioning and alignment under operation. Notably, this model does not include a ball chain or initial lubrication and lacks attachment elements on both the left and right front reference edges. However, it does come with relubrication openings to facilitate maintenance. The overall length of the runner block is specified as . mm, providing a compact footprint for various applications. One of the key attributes of this product is its interchangeability with guide rails of every accuracy class—P, H, and N—allowing for flexible system integration. The absence of self-alignment in this model necessitates precise alignment during installation but offers static torsional moment load capacity. This MINI R.BLOCK NRII has been engineered for optimal ball return and guidance which contributes to its smooth operation. Additionally, it has been designed with ball retention features that simplify the replacement process if needed. The product operates within a permissible ambient temperature range from min ... max °C and can handle dynamic load capacities as calculated according to DIN standards. In summary, the Bosch Rexroth MINI R.BLOCK NRII (R044229341) offers robust performance in miniature ball rail systems where space-saving design and corrosion resistance are essential requirements without compromising precision or load handling capabilities.


Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free

The miniature version of the ball runner block is characterized by the following product features:
Size 12
Format SNS: Width = slimline, length = normal, height = standard
Runner block body made of corrosion-inert steel
Preload class C0: Preload-free
Accuracy class H: High
Without ball chain
Without preservation
Without initial lubrication
Without attachment element, left (front reference edge)
Without attachment element, right (front reference edge)
With relubrication openings
Runner block body in standard version
Overall length of the runner block = 34.8 mm
Interchangeability: The runner block and the guide rails can be combined with each other with every accuracy.

Unpacked Weight: 0.033 kg
Accuracy classes P, H and N
Relubrication hole available
Smooth, quiet running thanks to optimally designed ball return and guideway
Ball retention for easy replacement
Material (profiled rail systems)Corrosion resistant steel
Height of runner block10
Footnote permissible ambient temperature (min ... max)100 °C admissible for short time.
Footnote dynamic load capacity CCalculated values acc. to DIN 636, part 2
Size E2 (profiled rail systems)15
Max. acceleration amax250
Permissible ambient temperature-10 °C ... +80 °C
Size A (profiled rail systems)27
Size A3 (profiled rail systems)7.5
Preload force0
FormatSNS - slimline, normal, standard height
Size A2 (profiled rail systems)12
Self-aligning for compensation of misalignmentsWithout self-alignment
Static torsional moment load capacity Mt0 footnoteCalculated values (derived from C, C0)
Maximum permissible linear speed vmax3
LubricationWithout initial lubrication and without preservation
Ball chainWithout ball chain (standard)
Size N3 (profiled rail systems)3.5
Footnote static load capacity C0Calculated values acc. to DIN 636, part 2
Pitch T guide rail25
Height of runner block with guide rail13
Static load rating C03470
Dynamic torsional moment load capacity Mt13.7
Size B (profiled rail systems)34.8
Note: Maximum permissible speed vmaxSpeeds of up to 5 m/s possible. Service life is limited by heightened wear to plastic parts.
Preload classC0 – Without preload (clearance)
Static longitudinal moment load capacity ML0 footnoteCalculated values (derived from C, C0)
SealLow-friction seal (mini)
Size B1 (profiled rail systems)21.6
Size H (profiled rail system)13
Size V13.3
Productgroup ID17
Accuracy classH - Highly accurate
Size B with tolerance (profiled rail systems)34,8 mm
Dynamic longitudinal moment load capacity ML footnoteCalculated values (derived from C, C0)
Permissible ambient temperature (max)+80
Dynamic longitudinal moment load capacity ML7.9
Size S2 (profiled rail systems)M3
Permissible ambient temperature (min)-10
Static torsional moment load capacity Mt020.6
Note: Max. acceleration amaxOnly with preloaded systems. For non-preloaded systems: amax = 50 m/s2
Runner block or guide railRunner block
Width of runner block27
Size T1 min (profiled rail systems)6
Dynamic torsional moment load capacity Mt footnoteCalculated values (derived from C, C0)
Length of runner block34.8
Linear guide typeMiniature ball rail system
Dynamic load capacity C2310
Static longitudinal moment load capacity ML011.8
Size E1 (profiled rail systems)20
Internal product informationFor low-friction seal (Mini) without longitudinal seal
Weight0.033
Nominal size12
Size H1 (profiled rail systems)10

Load capacities and load moments

Size

7 9/M3 12 15 20

C 1)

N

technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free 860 1180 2310 4200 7900

C0 1)

N

1400 2100 3470 6260 12230

Mt 2)

Nm

technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free 3.1 5.4 13.7 31.2 81.4

Mt0 2)

Nm

5.1 9.6 20.6 46.3 126

ML 2)

Nm

technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free 1.9 3.6 7.9 18.3 51.7

ML0 2)

Nm

3.2 6.4 11.8 27 80
1) Calculated values as per DIN 636, Part 2
2) Calculated values (derived from C, C0)

General technical data

Size

7 9/M3 12 15 20

amax 1)

m/s²

250

vmax 2)

m/s

3

m

g

9 16 33 47 177

Operating conditions

Size

7 9/M3 12 15 20

Permissible ambient temperature (min ... max) 3)

-10 °C ... +80 °C
1) Only with pre-tensioned systems. For non-pre-tensioned systems: amax = 50 m/s2
2) Speeds of up to 5 m/s are possible. Service life is limited by increased wear to plastic parts.
3) Brief peaks up to 100°C are permissible.

Note on dynamic load capacities and moments (see the table)

Determination of the dynamic load ratings and moments is based on a total travel of 100,000 m.

Often only 50,000 m are actually stipulated. For comparison: Multiply values C, Mt and ML from the table by 1.26.

Observe friction of the different seals. See document “Technical data”.

Technical data

Accuracy classes

Legend

Symbol

Description

Unit

amax

Maximum acceleration travel

m/s2

C

Dynamic load capacity

N

C0

Static load capacity

N

m

Mass

g

ML

Dynamic longitudinal moment load capacity

Nm

ML0

Static longitudinal moment load capacity

Nm

Mt

Dynamic torsional moment load capacity

Nm

Mt0

Static torsional moment laod capacity

Nm

vmax

Maximum permissible speed

m/s

Rigidity of the miniature ball rail systems at pretension

Mounted runner block with 4 screws, strength class 12.9

technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free

lift-off load

technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free

Down load

technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free
technical illustration-R044229341-Miniature ball runner block, SNS, size 12, Resist NRII, accuracy high, preload-free
1) 4 lubrication holes
2) Sizes 7 to 12
3) Funnel-type lube nipple
4) Sizes 15 - 20

Dimensions

Size

7 9/M3 12 15 20

A

mm

17 20 27 32 46

A2

mm

7 9 12 15 20

A3

mm

5 5.5 7.5 8.5 13

B

mm

24 31 34.8 43 66

B1

mm

14.9 20.7 21.6 27.2 45.1

B2

mm

- 46 69

E1

mm

12 15 20 25 38

E2

mm

8 10 15 20 38

H

mm

8 10 13 16 25

H1 Without longitudinal seal

mm

6.5 8 10 12 17.5

H1 With longitudinal seal

mm

- 12.65 18.15

K

mm

- 4

N3

mm

2.5 3 3.5 4 6

N5

mm

- 2.1 3.1

S2

mm

M2 M3 M4

V1

mm

2 2.8 3.3 4.7 7

General technical data and calculation

General mounting instructions

Start-up and maintenance

The runner blocks are delivered on a mounting aid.