Airtac SCJ50 Standard Cylinder SCJ50X50-30STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X50-30STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 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-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X50-30STC
The SCJ50X50-30STC is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a 50 mm nominal stroke, featuring a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. This model delivers a push force of 982 N at 0.5 MPa and is equipped with a built-in magnet for direct mounting of CMSG/DMSG/EMSG sensors, paired with a TC centre trunnion pivot for applications requiring angular movement.
With a 20 mm diameter piston rod and PT1/4 ports, the SCJ50X50-30STC uses a tie-rod construction and includes an adjustable air cushion for smooth deceleration. The TC mounting, supplied with the TCM1 bracket, allows the cylinder to pivot, making it ideal for swinging or articulating loads where the actuator must follow a curved path.
Airtac SCJ50 Standard Cylinder SCJ50X50-30STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X50-30STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 30 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 SCJ50X50-30STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×50 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ50X50-30STC Is Used
Commissioning & Setup
The 30 mm adjustable stroke allows technicians to precisely dial in the end position during machine commissioning without swapping cylinders or fabricating custom hard stops, saving significant setup time.
Pivoting Diverter Gates
The TC centre trunnion mount lets this cylinder pivot freely, making it perfect for actuating diverter gates on conveyor systems where the stroke end can be fine-tuned to ensure a perfect seal or alignment with the mating chute.
Wear Compensation
In high-cycle clamping or pressing fixtures, the adjustable stroke-end screw can be periodically advanced to compensate for wear on tooling or workpiece contact surfaces, maintaining consistent clamping force without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X50-30STC the Right Cylinder?
Choose the SCJ50X50-30STC when you need a 50 mm bore cylinder with a nominal 50 mm stroke and the ability to fine-tune the stroke end position by up to 30 mm, particularly on a pivoting assembly. If the 982 N push force at 0.5 MPa is insufficient, stepping up to an SCJ63 bore provides 1559 N of push force. For applications where the load path is strictly linear and does not require a trunnion mount, a basic or foot-mounted SCJ50 model would be a more cost-effective choice.
This unit is a direct replacement for another AirTAC SCJ50X50-30STC cylinder with the same bore, 50 mm nominal stroke, 30 mm adjust range, PT port thread, TC centre trunnion mount, and integrated magnet. For fixed-stroke applications without the need for field adjustment, the standard SC series offers a simpler alternative.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X50-30STC FAQ
As a single-rod cylinder, the push and pull forces differ. At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N. The maximum push force at the 0.9 MPa operating limit is 1767 N.
Yes, the SCJ50X50-30STC has the same bore, rod diameter, and port size as an SC50, but its body length is slightly longer to accommodate the adjusting screw. You can replace an SC50 with this model if you need the 30 mm adjustable stroke feature and the physical space allows for the longer body length. The mounting accessories are from the same F-SC50 family.
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