PRODUCTS INFORMATIONSpherical Rolling Joint
Spherical Rolling Joint
High Rigidity and High Precision with Zero Clearance Rolling Guideways
The essential multi-degree-of-freedom joints for parallel mechanisms have conventionally been obtained 2 to 3 degrees of freedom with combinations of spherical joints. However, such spherical joints combinations often lead to structural complexity and bulkiness.
There are multi-degree-of-freedom sliding spherical ball bearings available, but they come with large frictional resistance and internal clearance issues.
Hephaist has developed SRJ - Spherical Rolling Joints as the solutions to all these issues.
Features
High Precision
The moving parts of SRJ are preloaded rolling bearing structure, and it makes SRJ achieved high accuracy with low frictional resistance and zero clearance.
Downsizing
SRJ achieving higher rigidity and downsizing compared to a combination of rolling bearings with 3 degrees of freedom.
Highly Suited for Parallel Mechanisms
Optimal for parallel mechanisms requiring high precision, high rigidity, and compactness.
Super-Precise Spherical Surface Processing
Unique Hephaist processing technology provides super-precise spherical surfaces.
Dimension Chart
| Model Number | ΦA | ΦB | C | D | E | F | G | ΦH (spigot joint) |
ΦI | J | K (Thread runout section) |
ΦL Drill: U counterbore: Depth: |
M (Width across flats) |
ΦN | P | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SRJ004C | 19 | 0 -0.008 |
15 | 3.8 | 2.5 | 10 | 6 | M3 | 3.6 | -0.004 -0.012 |
4.5 | 2 | 1 | 4-2 φ3.5 1.5 |
4 | 6 | 1.5 |
| SRJ006C | 25 | 0 -0.013 |
20 | 5.5 | 3.8 | 11.5 | 8 | M4×0.5 | 4.5 | -0.004 -0.012 |
6 | 2 | 1 | 4-3 φ5 2.3 |
5 | 10 | 2 |
| SRJ008C | 30 | 0 -0.021 |
24 | 7 | 4 | 16 | 12 | M5×0.5 | 5.5 | -0.004 -0.012 |
8 | 4 | - | 4-3.4 φ6 2 |
7 | 11 | 2 |
| SRJ012C | 42 | 0 -0.02 |
34 | 11 | 6 | 20 | 15 | M10 | 11 | -0.006 -0.017 |
16 | 2 | 2 | 4-4.3 φ8 3.6 |
14 | 14 | 2 |
| SRJ016C | 56 | 0 -0.03 |
45 | 12 | 7 | 32 | 18 | M12 | 12.6 | -0.006 -0.017 |
16 | 3 | - | 4-5.5 φ9.5 4.6 |
14 | 25 | 5 |
| SRJ024C | 74 | 0 -0.03 |
62 | 17 | 11 | 42 | 23 | M14 | 15 | -0.006 -0.017 |
19 | 5 | - | 4-6.6 φ11 5.5 |
17 | 35 | 7 |
| SRJ032C | 100 | 0 -0.035 |
84 | 22 | 16 | 60 | 30 | M16 | 16.6 | 0 -0.011 |
25 | 6 | - | 4-9 φ14 8.6 |
22 | 48 | 10 |
| SRJ048C | 136 | 0 -0.04 |
114 | 38 | 22 | 78 | 38 | M28×2 | 30 | 0 -0.013 |
36 | 6 | - | 6-11 φ17.5 10.8 |
30 | 60 | 10 |
Note 1) Delivered with rust-preventive oil as standard.If the customer specifies a grease, it will be applied.
Note 2) When the axis is turned, the retainer projects beyond the bottom of the housing, so the mounting face on the other side has to be machined to create a recess.
Material
Housing：SUJ2/ROD：SUJ2・S45C/Retainer：C3604A-LCd
Product Specifications
| Model Number | Basic Load Rating C(N) | Static load capacity | Permissible Load | Weight(kg) | Permissible angle of swing(°) | ||
|---|---|---|---|---|---|---|---|
| C(N) | Co(N) | Axial pushing(N) | Axial pulling(N) | Radial(N) | |||
| SRJ004C | 128 | 100 | 102 | 38 | 64 | 0.015 | ±15 |
| SRJ006C | 320 | 280 | 256 | 96 | 160 | 0.036 | ±30 |
| SRJ008C | 490 | 540 | 392 | 147 | 245 | 0.06 | ±30 |
| SRJ012C | 720 | 770 | 576 | 216 | 360 | 0.18 | ±30 |
| SRJ016C | 1170 | 1300 | 936 | 351 | 585 | 0.37 | ±30 |
| SRJ024C | 2840 | 3920 | 2272 | 852 | 1420 | 0.93 | ±30 |
| SRJ032C | 5800 | 8820 | 4640 | 1740 | 2900 | 2.3 | ±30 |
| SRJ048C | 10600 | 16000 | 8480 | 3180 | 5300 | 6.73 | ±30 |
Model Configuration
The standard product material is SUJ2 (high carbon, high chromium bearing steel).
Stainless steel is also used upon request.
Surface treatment (low-temperature black chromium treatment) can also be arranged.
Precision class SP is available for items SRJ008 to SRJ032.
Spherical Rolling Joint Short Shaft Type SRJSPRODUCTS
Reduced height contributes to the utilization of limited space
SRJ is widely used in semiconductor manufacturing equipment and optical equipmentdue to its compatibility with tilt mechanisms.
In recent years, there has been an increasing demand for reducing the height of the tilt mechanism. We have added a short shaft type to our product lineup that reduces the height by shortening the shaft while maintaining the conventional high rigidity and high accuracy.
Features
Even more compact
Responding to requests to reduce the height direction, we have achieved a reduction of up to 35%.
Increased freedom of choice with additional options
Surface treatment and grease sealing are also available.
※Surface treatment and grease filling are also available.
Shorter delivery lead time
We have stocked these products as part of our standard lineup and shortened the delivery time.
These products are kept in stock as part of our standard lineup, enabling shorter delivery times.
Compatibility
Installation compatibility with conventional products and easy switching.
| Model Number | A | B | C ➀ | D | E | F | G | H | I | J | K | L | M | N | P | Q | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| SRJS008C | φ30 | 0 -0.021 |
11 | 16.5 | 10 | φ8.6 | φ5.5 | -0.004 -0.012 |
2 | M5×0.5 | - | ±15° | 2 | φ11 | 3 Width Across Flats 7 |
0.6 | 7 | 9.5 |
| SRJS012C | φ42 | 0 -0.020 |
17 | 24.5 | 15 | φ12.6 | φ11 | -0.006 -0.017 |
2 | M10 | φ30 | ±20° | 2 | φ14 | 3.5 Width Across Flats 10 |
1 | 13.5 | 11 |
| SRJS016C | φ56 | 0 -0.030 |
19 | 29.5 | 18 | φ16 | φ12.6 | -0.006 -0.017 |
3 | M12 | φ40 | ±20° | 5 | φ25 | 4.5 Width Across Flats 14 |
3.4 | 17.5 | 12 |
| SRJS024C | φ74 | 0 -0.030 |
28 | 40.5 | 23 | φ21 | φ15 | -0.006 -0.017 |
5 | M14 | φ50 | ±20° | 7 | φ35 | 4.5 Width Across Flats 17 |
5.3 | 23.5 | 17 |
| Standard SRJC C ➁ |
Short Shaft Dimension ➁-➀ | Height Reduction Ratio |
Recommended Spanner Thin Spanner (Made by TRUSCO) |
|
|---|---|---|---|---|
| SRJS008C | 23 | 6.5 | 28.3% | Part Number：TSS-5507 |
| SRJS012C | 31 | 6.5 | 21.0% | Part Number：TSS-1012 |
| SRJS016C | 44 | 15.5 | 35.2% | Part Number：TSS-1417 |
| SRJS024C | 59 | 18.5 | 31.4% | Part Number：TSS-1417 |
