Airtac SCJ50 Standard Cylinder SCJ50X150-50STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X150-50STC 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, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke150 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X150-50STC
The SCJ50X150-50STC is a double-acting, single-rod pneumatic cylinder with a 50 mm bore and a nominal 150 mm stroke, equipped with a rear adjusting screw that provides a 50 mm field-adjustable range for fine-tuning the stroke end position. With a 20 mm diameter piston rod and PT1/4 ports, this tie-rod cylinder delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a strong performer in its class for applications requiring on-machine stroke calibration.
This model features a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG sensors, and a centre trunnion (TC) mount, supplied with the TCM1 bracket (F-SC50TC), which allows the cylinder to pivot for swinging or angular load paths. The body length A(SCJ) is 194 mm, and the adjustable air cushion decelerates the piston smoothly at both ends, protecting the end caps during high-cycle operation.
Airtac SCJ50 Standard Cylinder SCJ50X150-50STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X150-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 150 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 SCJ50X150-50STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×150 | 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 SCJ50X150-50STC Is Used
Commissioning & Setup
The 50 mm adjustment screw allows technicians to dial in the exact stroke end position during machine commissioning without swapping cylinders or machining custom stops, saving hours of setup time.
Format Changeovers
In packaging or sorting lines, the 50 mm adjustable range lets operators quickly retract the stroke end to accommodate different product sizes or box formats, reducing changeover downtime.
Wear Compensation
Over time, gripper pads or tooling tips can wear down. The rear screw can be advanced to take up this mechanical play, restoring the precise end position without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X150-50STC the Right Cylinder?
Choose the SCJ50 bore for push forces up to 1767 N at 0.9 MPa. If your application requires more force, stepping up to the SCJ63 provides 1559 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC series is a direct alternative. This SCJ50X150-50STC is a genuine AirTAC replacement for any SCJ adjustable-stroke cylinder with a 50 mm bore, 150 mm nominal stroke, 50 mm adjust range, PT ports, magnet, and TC centre trunnion mount. For strokes of 300 mm or longer, consider an external guide rail or a guided cylinder to protect the 20 mm rod from side-load bending.
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 SCJ50X150-50STC FAQ
At the standard 0.5 MPa operating pressure, this 50 mm bore cylinder generates 982 N of push force and 825 N of pull force. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1963 N.
Yes, if you need the added benefit of a field-adjustable stroke. The SCJ50X150-50STC matches the mounting footprint of an SC50X150 with TC mount, but adds a 50 mm adjustable stroke-end screw. Ensure your machine has clearance for the slightly longer rear cap.
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