SJC Series
Jaw Coupling
- Product Overview
Dimensions / Performance / CAD
SJC(No mark / Set-screw) SJC-C (Side-clamp) SJCM-C (Side-clamp/Space-saving) SJC-T (Taper-ring) SJC-I (Shaft-insertion)
- Power transmission through the spider (sleeve) in the middle
- The highest durability comparing to other coupling series
- Various clamping methods available
- High precision with preloaded assembly
Set-screw Size : 14 ~ 100View more >
Structure | Material | Surface Treatment |
---|---|---|
Hub | High Strength Aluminum Alloy | Anodizing |
Sleeve | Hytrel®(RD/GR) TPU (BL) |
- |
Fastening Screw | SCM435 | Black Oxide |
Side-clamp (Space-saving) Size : M-55C ~ M-100CView more >
Structure | Material | Surface Treatment |
---|---|---|
Hub | High Strength Aluminum Alloy | Anodizing |
Sleeve | Hytrel®(RD/GR) TPU (BL) |
|
Fastening Screw | SCM435 | Black Oxide |
Side-clamp Size : 14C ~ 100CView more >
Structure | Material | Surface Treatment |
---|---|---|
Hub | High Strength Aluminum Alloy | Anodizing |
Sleeve | Hytrel®(RD/GR) TPU (BL) |
- |
Fastening Screw | SCM435 | Black Oxide |
Side-clamp Size : 120C ~ 160CView more >
Structure | Material | Surface Treatment |
---|---|---|
Hub | Steel | Electroless Nickel Plating |
Sleeve | Hytrel®(RD/GR) | - |
Fastening Screw | SCM435 | Electroless Nickel Plating |
Taper-ring Size : 55T ~ 100TView more >
Structure | Material | Surface Treatment |
---|---|---|
Hub | High Strength Aluminum Alloy | Anodizing |
Sleeve | Hytrel®(RD/GR) TPU (BL) |
- |
Fastening Screw | SCM435 | Black Oxide |
Shaft-insertion Size : 25I ~ 65IView more >
Structure | Material | Surface Treatment |
---|---|---|
Hub | High Strength Aluminum Alloy | Anodizing |
Sleeve | Hytrel®(RD/GR) TPU (BL) |
- |
Bushing | Stainless Steel | |
Fastening Screw | SCM435 | Black Oxide |
How to Order(Set-screw / Side-clamp / Taper-ring)
① Clamping Methods
- No mark
- Set-screw
- C
- General Side-clamp
- CW
- Side-clamp Hub Split
- T
- Taper-ring
② Sleeve Type (Shore Hardness)
- RD
- Hytrel, Sh63D
- GR
- Hytrel, Sh98A
- BL
- TPU, Sh98A
③ Center-Through
- No mark
- Center-Solid
- TH
- Center-Through
④ Side-clamp Hub Split
- No mark
- Not Split
- W
- Split (Only applicable on Side-clamp Type)
⑤ Keyway
- No mark
- No Keyway
- K(b size)
- Keyway processed according to the indicated b size.
(Keyway is not applicable on Taper-ring type)
※ HOW TO ORDER(Shaft-insertion) : View more >
Side-clamp Hub Split(W) Option is available
- From certain outer diameter (OD) sizes, we can provide Side-clamp Hub Split products. Please refer to “HOW TO ORDER” page for more details.
Product Features & Application
Sleeve Material | Hytrel (RD/GR) | TPU (BL) | |
---|---|---|---|
Backlash free (Precision) | ○ | ○ | |
High Torque (Durability) | ☆ | ☆ | |
Torsional Stiffness | △ | △ | |
Vibration Absorption | △ | ○ | |
Misalignment Absorption | △ | △ | |
Insulation of Electric Current | ○ | ○ | |
Applicable Motors | Servo | ○ | ○ |
Stepping | ○ | ○ | |
Encoder | △ | △ | |
General | ☆ | ☆ | |
Permissible Temperature | -20℃ ~ 120℃ | -20℃ ~ 70℃ |
Application : Machine tools, Press machine, Injection Molding machine, Pneumatic machine, Pump, Cartesian Robot, Belt Drive, Logistics facilities etc.
Clamping Methods
Set-screw (No mark) |
General | △ |
---|---|---|
With Keyway | △ | |
Side-clamp (C) | General | ○ |
Hub Split | △ | |
With Keyway | ○ | |
Shaft-insertion (I) | △ | |
Taper-ring (T) | △ |
※ △ symbol in the above table means that the availability is subject to differ according to each outer diameter size.
※ You may check more details on the “Dimensions / Performance” tables in the following pages.
Sleeve Material
- A Sleeve (Spider) is the medium that transmits motion absorbing impact and misalignment and it is the core part of Jaw couplings.
- Hytrel® is superior in terms of mechanical strength, abrasion resistance and heat resistance whereas TPU (Thermoplastic polyurethane) has higher damping capacity.
- According to material and shore hardness, there are 3 types of sleeves, RD(Hytrel, Sh 63D), GR(Hytrel, Sh 98A) and BL(TPU, Sh 98A) respectively.
Sleeve Types (General: Center-Solid / TH: Center-Through)
If the shaft has to be inserted deeper than L1 value, we can provide appropriate center-through sleeves. Please refer to “HOW TO ORDER” in the previous page. Either type has the identical value of transmittable torque and the same level of misalignment absorption.
Type | 14 - 30 | 40 | 48 - 100 | 120 - 135 | 160 |
---|---|---|---|---|---|
General : Center-Solid | - | - | |||
TH : Center-Through |
Center-Through Sleeve Bore Size
Model | Max. standard ID | Sleeve-TH ID |
---|---|---|
SJC-14 | Φ5 | - |
SJC-20 | Φ8 | Φ6 |
SJC-25 | Φ10 | Φ6.35 |
SJC-30 | Φ14 | Φ8 |
SJC-40 | Φ18 | Φ15 |
SJC-48 | Φ28 | Φ20 |
SJC-55 | Φ28 | Φ25 |
SJC-65 | Φ35 | Φ25 |
SJC-80 | Φ45 | Φ32 |
SJC-90 | Φ50 | Φ40 |
SJC-100 | Φ60 | Φ45 |
SJC-120 | Φ65 | Φ55 |
SJC-135 | Φ70 | Φ65 |
SJC-160 | Φ80 | Φ75 |
Preload on Sleeves
Sung-il’s SJC Series is assembled with adequate preload and its outstanding features are as below.
- Improved static torsional stiffness brings faster response
- Minimized backlash as there is no clearance at the assembled area
Model | Distance S | Model | Distance S | Model | Distance S |
---|---|---|---|---|---|
SJC-14 | 1.0mm | SJC-40, 48, 55 | 2mm | SJC-100 | 3.5mm |
SJC-20 | 1.0mm | SJC-65 | 2.5mm | SJC-120 | 4mm |
SJC-25 | 1.2mm | SJC-80 | 3mm | SJC-135 | 4.5mm |
SJC-30 | 1.5mm | SJC-90 | 3mm | SJC-160 | 5mm |
Performance table according to sleeve types
Model | Code | Material | Shore Hardness |
Rated Torque (N·m) |
Max. Torque (N·m) |
Static Torsional Stiffness (N·m/rad) |
Permissible Misalignment | ||
---|---|---|---|---|---|---|---|---|---|
Angular (˚) |
Parallel (mm) |
End-play (mm) |
|||||||
SJC-14 | BL | TPU | 98A | 2 | 4 | 22 | 1 | 0.05 | -0.2 ~ +0.6 |
GR | Hytrel | 98A | 2 | 4 | 25 | 1 | 0.05 | -0.2 ~ +0.6 | |
RD | Hytrel | 63D | 2.5 | 5 | 34 | 1 | 0.03 | -0.2 ~ +0.6 | |
SJC-20 | BL | TPU | 98A | 4 | 8 | 50 | 1 | 0.07 | -0.3 ~ +0.8 |
GR | Hytrel | 98A | 4 | 8 | 60 | 1 | 0.07 | -0.3 ~ +0.8 | |
RD | Hytrel | 63D | 6 | 12 | 74 | 1 | 0.05 | -0.3 ~ +0.8 | |
SJC-25 | BL | TPU | 98A | 9 | 18 | 220 | 1 | 0.07 | -0.4 ~ +1.0 |
GR | Hytrel | 98A | 9 | 18 | 260 | 1 | 0.07 | -0.4 ~ +1.0 | |
RD | Hytrel | 63D | 12 | 24 | 300 | 1 | 0.05 | -0.4 ~ +1.0 | |
SJC-30 | BL | TPU | 98A | 12 | 24 | 170 | 1 | 0.08 | -0.5 ~ +1.0 |
GR | Hytrel | 98A | 12 | 24 | 200 | 1 | 0.08 | -0.5 ~ +1.0 | |
RD | Hytrel | 63D | 16 | 32 | 220 | 1 | 0.06 | -0.5 ~ +1.0 | |
SJC-40 | BL | TPU | 98A | 17 | 34 | 1,500 | 1 | 0.06 | -0.6 ~ +1.2 |
GR | Hytrel | 98A | 17 | 34 | 1,600 | 1 | 0.06 | -0.6 ~ +1.2 | |
RD | Hytrel | 63D | 21 | 42 | 1,750 | 1 | 0.04 | -0.6 ~ +1.2 | |
SJC-48 | BL | TPU | 98A | 35 | 70 | 1,800 | 1 | 0.08 | -0.6 ~ +1.3 |
GR | Hytrel | 98A | 35 | 70 | 2,800 | 1 | 0.08 | -0.6 ~ +1.3 | |
RD | Hytrel | 63D | 40 | 80 | 3,600 | 1 | 0.05 | -0.6 ~ +1.3 | |
SJC-55 | BL | TPU | 98A | 60 | 120 | 3,000 | 1 | 0.09 | -0.6 ~ +1.4 |
GR | Hytrel | 98A | 60 | 120 | 4,500 | 1 | 0.09 | -0.6 ~ +1.4 | |
RD | Hytrel | 63D | 75 | 150 | 6,000 | 1 | 0.06 | -0.6 ~ +1.4 | |
SJC-65 | BL | TPU | 98A | 150 | 300 | 6,500 | 1 | 0.1 | -0.6 ~ +1.5 |
GR | Hytrel | 98A | 150 | 300 | 8,500 | 1 | 0.1 | -0.6 ~ +1.5 | |
RD | Hytrel | 63D | 180 | 360 | 10,000 | 1 | 0.08 | -0.6 ~ +1.5 | |
SJC-80 | BL | TPU | 98A | 300 | 600 | 8,000 | 1 | 0.1 | -0.6 ~ +1.5 |
GR | Hytrel | 98A | 300 | 600 | 12,000 | 1 | 0.1 | -0.6 ~ +1.5 | |
RD | Hytrel | 63D | 380 | 760 | 14,000 | 1 | 0.08 | -0.6 ~ +1.5 | |
SJC-90 | BL | TPU | 98A | 450 | 900 | 12,000 | 1 | 0.15 | -0.6 ~ +2.0 |
GR | Hytrel | 98A | 450 | 900 | 14,000 | 1 | 0.15 | -0.6 ~ +2.0 | |
RD | Hytrel | 63D | 500 | 1,000 | 16,000 | 1 | 0.1 | -0.6 ~ +2.0 | |
SJC-100 | BL | TPU | 98A | 500 | 1,000 | 24,000 | 1 | 0.15 | -0.6 ~ +2.0 |
GR | Hytrel | 98A | 500 | 1,000 | 30,000 | 1 | 0.15 | -0.6 ~ +2.0 | |
RD | Hytrel | 63D | 600 | 1,200 | 40,000 | 1 | 0.1 | -0.6 ~ +2.0 | |
SJC-120 | GR | Hytrel | 98A | 620 | 1,240 | 50,000 | 0.9 | 0.16 | -1.0 ~ +2.2 |
RD | Hytrel | 63D | 740 | 1,480 | 90,000 | 0.8 | 0.11 | -1.0 ~ +2.2 | |
SJC-135 | GR | Hytrel | 98A | 850 | 1,700 | 60,000 | 0.9 | 0.17 | -1.0 ~ +2.2 |
RD | Hytrel | 63D | 1,050 | 2,100 | 100,000 | 0.8 | 0.12 | -1.0 ~ +2.2 | |
SJC-160 | GR | Hytrel | 98A | 1,700 | 3,400 | 90,000 | 0.9 | 0.2 | -1.5 ~ +3.0 |
RD | Hytrel | 63D | 2,100 | 4,200 | 150,000 | 0.8 | 0.14 | -1.5 ~ +3.0 |