Airtac SCJ50 Standard Cylinder SCJ50X300-10S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X300-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø50mm bore, 300mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke300 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X300-10S
The SCJ50X300-10 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 982 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides a 10 mm fine-tuning range, letting you dial in the exact stroke end position without removing the cylinder or adding external hard stops. The 20 mm diameter piston rod and PT1/4 ports suit medium-force clamping, pressing, and positioning tasks.
This model includes a built-in magnet (-S suffix), allowing CMSG, DMSG, or EMSG reed and solid-state sensors to mount directly onto the tie-rod barrel for reliable end-of-stroke detection. With a 21 mm air cushion and a body length A of 194 mm, it fits into compact machine layouts. The maximum operating pressure is 1.0 MPa, producing a push force of 1767 N.
Airtac SCJ50 Standard Cylinder SCJ50X300-10S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X300-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 10 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 SCJ50X300-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -10 | 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 SCJ50X300-10S Is Used
Commissioning Fine-Tuning
During machine setup, the 10 mm rear screw lets technicians micro-adjust the stroke end to align with tooling or fixtures, eliminating the need to shim or reposition the entire cylinder.
Wear Compensation on Stops
On a packaging line, the adjustable stroke compensates for gradual wear on a mechanical end-stop pad, maintaining consistent product placement without swapping the cylinder.
Format Changeover
When a machine switches between product sizes, the operator can quickly dial the stroke back by up to 10 mm to match a new box or part dimension, reducing changeover time.
Is the Airtac SCJ50 Standard Cylinder SCJ50X300-10S the Right Cylinder?
Choose the SCJ50X300-10 when you need a 300 mm nominal stroke with a small 10 mm adjustment window for commissioning or wear take-up. If your force requirement is lower, the 40 mm bore SCJ40 delivers 628 N push at 0.5 MPa; for higher force, the 63 mm bore SCJ63 provides 1559 N. Because this is a 300 mm stroke, evaluate side-loading on the 20 mm rod—if the load is not guided, add an external guide rail or consider a guided cylinder to prevent rod bending. For a fixed-stroke application, the standard SC series offers the same bore and force without the rear adjustment mechanism. A direct replacement must match the 50 mm bore, 300 mm nominal stroke, 10 mm adjustment range, PT port thread, and the -S magnet option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-10)
- ✓ 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 SCJ50X300-10S FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N (the pull force is lower due to the 20 mm rod area). At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N. The theoretical force at 1.0 MPa is 200 kgf.
A screw in the rear cap limits the piston's retraction stroke end. Turning the screw shortens the effective stroke by up to 10 mm from the nominal 300 mm maximum. It only adjusts the stroke end position; it does not change the cylinder's force, speed, or cushioning performance.
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