Airtac SCJ50 Standard Cylinder SCJ50X30-30
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X30-30 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, 30mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke30 mm
- Stroke adjust-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X30-30
The SCJ50X30-30 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, allowing operators to fine-tune the retract position by up to 30 mm via a rear-cap screw. With a 50 mm bore delivering 982 N of push force at 0.5 MPa, it handles moderate clamping, pressing, and positioning tasks where the exact stroke length must be dialed in during commissioning or changeover.
This model uses a 20 mm diameter piston rod and PT1/4 ports. The adjustable screw shortens the nominal 30 mm stroke end without altering the cylinder's push force, which can reach 1767 N at the maximum operating pressure of 0.9 MPa. The body length (A dimension) is 194 mm, slightly longer than a fixed-stroke SC of the same bore.
Airtac SCJ50 Standard Cylinder SCJ50X30-30 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X30-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 30 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 SCJ50X30-30
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×30 | 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 SCJ50X30-30 Is Used
Commissioning & Setup
Fine-tune the retract end-stop on a new assembly line without swapping cylinders or machining external hard stops, speeding up machine bring-up.
Format Changeover
Adjust the stroke end for different product sizes on a packaging machine, allowing a single cylinder to handle multiple formats with a simple screw turn.
Wear Compensation
Take up mechanical play or seal wear in a clamping fixture over time by slightly shortening the stroke, maintaining consistent clamp force without replacing parts.
Is the Airtac SCJ50 Standard Cylinder SCJ50X30-30 the Right Cylinder?
Step up to a 63 mm bore (1559 N push at 0.5 MPa) if the 50 mm bore's 982 N push force is marginal for the application. For applications that do not require in-field stroke adjustment, a fixed-stroke SC50 cylinder is a simpler, more cost-effective alternative. The direct replacement for this unit is another SCJ adjustable-stroke cylinder with a 50 mm bore, 30 mm nominal stroke, a 30 mm adjust range, PT ports, and basic mounting.
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 SCJ50X30-30 FAQ
Push force is 982 N at 0.5 MPa and 1767 N at 0.9 MPa. Pull force is lower due to the single 20 mm rod, providing 825 N at 0.5 MPa and 1485 N at 0.9 MPa.
Yes, if you need the ability to shorten the stroke end by up to 30 mm. The SCJ50X30-30 has the same bore, rod, and port size but includes the rear adjusting screw, making its body slightly longer. Ensure the longer A dimension (194 mm) fits your machine.
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