Airtac SCJ50 Standard Cylinder SCJ50X50-50S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø50mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke50 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-50S
The SCJ50X50-50S is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal 50 mm stroke, featuring a rear-cap adjusting screw that provides a full 50 mm of field-adjustable stroke reduction. This allows fine-tuning of the piston end position without swapping the cylinder, ideal for commissioning and format changes. It delivers 982 N of push force and 825 N of pull force at 0.5 MPa, with a 20 mm diameter piston rod and M16x1.5 rod thread for robust connection.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors on the tie-rod barrel for reliable end-of-stroke position feedback. The cylinder body length (A dimension) is 194 mm, and it features an adjustable air cushion of 21 mm for smooth deceleration. It uses standard PT1/4 ports and a default TPU seal for operation from -20 to +70 °C.
Airtac SCJ50 Standard Cylinder SCJ50X50-50S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 50 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 21 mm |
| Max stroke | Up to 1200 mm |
Specifications follow the official AirTAC SCJ (adjustable-stroke) datasheet. The rear adjusting screw sets the stroke end position; force is the same as the equivalent single-rod SC bore. Confirm against the product label before installation. Thread options: PT (standard) / G.
Theoretical Output Force (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 kgf | |
SCJ is single-rod, so force matches the equivalent SC bore: push uses the full bore area, pull subtracts the rod area. Actual usable force is lower than theoretical due to friction and back-pressure; size with a safety margin.
Model Code: Airtac SCJ50 Standard Cylinder SCJ50X50-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -50 | Adjustable-stroke range in mm (options 10/20/30/40/50/75/100). |
| -S | Optional built-in magnet for sensor position sensing. |
Related types: SC (single rod, fixed stroke), SCD (double rod), SCT (multi-position). SCJ mounting: Basic, FA, LB, TC, TCM1. Seals: TPU standard / H = Viton / N = NBR. Thread: blank = PT, G = G thread.
Where the Airtac SCJ50 Standard Cylinder SCJ50X50-50S Is Used
Commissioning & Setup
The 50 mm stroke-end adjustment allows technicians to dial in the exact stopping point during machine commissioning without fabricating custom hard stops, significantly reducing setup time on assembly lines.
Product Changeover
Quickly adapt to different product heights or widths on packaging or sorting conveyors by adjusting the cylinder stroke end, eliminating mechanical change parts and reducing downtime between batches.
Wear Compensation
In clamping or pressing fixtures, the adjustable screw can be advanced to take up for tooling or pad wear over time, maintaining consistent clamping force and part quality without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-50S the Right Cylinder?
Choose the SCJ50X50-50S when you need a mid-range force actuator with a 50 mm adjustable stroke-end range for precise mechanical setup. If your application requires more force, stepping up to a 63 mm bore (SCJ63) provides 1559 N of push force at 0.5 MPa. For applications needing a fixed, non-adjustable stroke, the standard SC50 series offers a more economical option without the rear adjusting mechanism.
A direct replacement must match the 50 mm bore, 50 mm nominal stroke, 50 mm adjust range, PT1/4 ports, basic mounting, and integrated magnet. This SCJ cylinder is a tie-rod design and is not dimensionally interchangeable with ISO 15552 profiles. For strokes of 300 mm or longer, evaluate side-loading on the 20 mm rod and consider an external guide or a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ50 Standard Cylinder SCJ50X50-50S FAQ
At the standard operating pressure of 0.5 MPa, this cylinder provides a push force of 982 N and a pull force of 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N. The pull force is lower due to the area of the 20 mm piston rod.
A threaded screw in the rear cap acts as an internal, adjustable end-stop for the piston. You can shorten the effective stroke by up to 50 mm from the nominal 50 mm maximum. This sets the retracted end position; it does not adjust the cylinder's speed or output force.
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