SOLID SHAFT WV-20H6-CR
Manufacturer: Bosch Rexroth
Material #: R100002060
Model : SOLID SHAFT WV-20H6-CR
***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 SOLID SHAFT (R100002060) is a precision-engineered component designed for use with linear bushings and shafts in demanding applications. This solid shaft is made from heat-treated steel and features a hard chrome plating, providing optimal surface corrosion protection on the outer diameter. With a shaft diameter tolerance classified under grade h6, this product ensures high precision in fitting and operation. The chrome plating has a thickness of approximately 20 micrometers, with a hardness of around 900 HV, enhancing the durability and lifespan of the shaft.
This model boasts an impressive hardness depth of at least 0.55mm, ensuring consistent performance even under high-stress conditions. The surface roughness RA is maintained at less than 0.2 micrometers, contributing to the smooth interaction with linear bushings. The straightness tolerance is held to within 0.1mm per meter of length, adhering to ISO standards for precision.
The SOLID SHAFT WV-20H6-CR's cylindricity and roundness tolerances further attest to its manufacturing excellence, ensuring reliable guidance and reduced friction for moving parts. Weighing approximately 2.58 kg per meter, this solid shaft can be combined in sections to achieve longer lengths without compromising functionality—linear bushings can simply roll over joints without interruption.
Designed for robust performance in linear motion systems, this Bosch Rexroth precision steel shaft exemplifies quality and reliability for various mechanical applications where precise motion control is paramount. Its construction not only provides strength but also maintains accuracy over extended use, making it an essential component for industrial-grade linear guidance systems.
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Dimensional accuracy and tolerance zones
The diameters of the precision steel shafts come in h6 and h7 tolerance zones. The adjacent table shows information on dimensional accuracy. The diameter tolerance of annealed shaft cross-sections vary slightly from the specified tolerance zone.
|
Ød |
mm |
12 | 16 | 20 | 25 | 30 | 40 | 50 | 60 | 80 | |||||||||
|
Tolerance grade |
h6 | h7 | h6 | h7 | h6 | h7 | h6 | h7 | h6 | h7 | h6 | h7 | h6 | h7 | h6 | h7 | h6 | h7 | |
|
Diameter tolerance |
µm |
0 - 11 |
0 - 18 |
0 - 11 |
0 - 18 |
0 - 13 |
0 - 21 |
0 - 13 |
0 - 21 |
0 - 13 |
0 - 21 |
0 - 16 |
0 - 25 |
0 - 16 |
0 - 25 |
0 - 19 |
0 - 30 |
0 - 19 |
0 - 30 |
|
t1 |
µm |
5 | 8 | 5 | 8 | 6 | 9 | 6 | 9 | 6 | 9 | 7 | 11 | 7 | 11 | 8 | 13 | 8 | 13 |
|
t2 1) |
µm |
8 | 11 | 8 | 11 | 9 | 13 | 9 | 13 | 9 | 13 | 11 | 16 | 11 | 16 | 13 | 19 | 13 | 19 |
|
t3 2) |
µm/m |
100 | |||||||||||||||||
|
Ra |
µm |
0.32 | |||||||||||||||||
| 1) | Measurements if differences in diameter |
| 2) | The smallest possible value is 40 µm for lengths under 1 m. Straightness is measured based on ISO 13012. |
Measurement of straightness based on ISO 13012
The measuring points are evenly distributed between the support points and the shaft sections protruding past them. More supports are used accordingly for long, thin shafts. Straightness is half of the gauge measurement when turning the shaft 360°.
Measurement of roundness
The drawing shows the roundness of a raw shaft compared to a precision steel shaft.
a) Raw shaft
b) Precision shaft
Shaft hardness
The outer zone of the shaft is induction-hardened. Depending on the shaft diameter, the depth of hardness ranges from 0.4 to 2.4 mm. Linear and transverse surface hardness and depth of hardness are highly consistent. This ensures high dimensional consistency and long service life. The adjacent figure shows the cross-section and longitudinal section of a hardened and polished precision steel shaft. The hardened surface zone is made visible by caustic etching.
Technische Daten
|
Ød |
mm |
12 | 16 | 20 | 25 | 30 | 40 | 50 | 60 | 80 |
|
L 1) |
mm |
75 | ||||||||
|
Mill-cut length |
mm |
6100 | ||||||||
|
Lmax 2) |
mm |
5350 | 6350 | 6850 | ||||||
|
Hardness 3) |
Min. 60 HRC (about 700 HV) | |||||||||
|
Material no. |
1.1213 | |||||||||
|
Depth of hardness (min.) |
mm |
0.6 | 0.9 | 1.5 | 2.2 | |||||
|
m |
kg/m |
0.88 | 1.57 | 2.45 | 3.83 | 5.51 | 9.8 | 15.32 | 22.05 | 39.21 |
| 1) | Regarding geometry and hardness |
| 2) | Sections are combined for longer overall lengths. Linear bushings can simply be rolled over joints. |
| 3) | Optional: Chrome plating (about 10 μm thick), about 1000 HV |
Legend
|
Symbol |
Description |
Unit |
|
Ød |
Shaft diameters |
mm |
|
L |
Length |
mm |
|
Lmax |
Maximum length |
mm |
|
m |
Mass |
kg/m |
|
t1 |
Roundness tolerance |
μm |
|
t2 |
Cylindricity |
μm |
|
t3 |
Straightness |
μm/m |
|
Ra |
Surface roughness |
μm |
Technical data
Shaft machining
Chamfering
When used as round guides for Linear Bushings, the ends of steel shafts must be chamfered so the ball retainers/wiper seals are not damaged when the Linear Bushings are pressed onto the shafts. The figure and table show the chamfering dimensions. Linear bushings with wiper seals cannot be pressed over sharp edges on the shaft (e.g., retaining ring grooves) since the sealing lips will be damaged.
|
Shaft diameters |
mm |
3 |
4 |
5 |
8 |
10 |
12 |
14 |
16 |
20 |
25 |
25 |
30 |
40 |
50 |
60 |
80 |
|
Length of chamfers L1 |
mm |
1 |
1,5 |
1,5 |
1,5 |
1,5 |
2 |
2 |
2 |
2 |
2 |
2 |
2 |
3 |
3 |
3 |
3 |
Processing
Hardened and polished steel shafts are available in mill-cut lengths. These can be cut to size and machined to include:
Spigots Female and male threads Counterbores Radial and axial holes Grooves Other machining
Unmachined, cut-to-size shafts come chamfered for accident prevention unless ordered otherwise.
Annealing machined sections
Annealing may be necessary when machining shafts due to the hardened outer zone (minor change in size possible).
Length tolerance for cut-to-size shafts
|
Shaft length |
Tolerance (mm) |
|
< 400 |
±0,5 |
|
≤ 400 ‒ 1000 |
±0,8 |
|
≤ 1000 ‒ 2000 |
±1,2 |
|
≤ 2000 ‒ 4000 |
±2,0 |
|
≤ 4000 ‒ 6000 |
±3,0 |
|
≤ 6000 ‒ 8000 |
±3,5 |
Steel shafts with smaller length tolerances are also available at additional cost.
Concentric and axial spigot runout
A review in accordance with a specified principle will be performed upon request. Values xxx < 0.02 on request.
a) about 50 mm
Life expectancy calculation
Interconnected shafts – plug-and-socket connection
We also provide interconnectable steel shafts when more than the mill-cut length is needed. One shaft then comes with a spigot-and-recess arrangement, the next with a matching recess (see figure). The interconnected shaft must be supported throughout or at intervals, though generally at the joins (see Section "Shaft support rails"). The shafts must be under axial tension when fastening the shaft support rails so no gaps form at the joins. Linear bushings can simply be rolled over joints.
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