Airtac SCJ50 Standard Cylinder SCJ50X125-10S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X125-10S 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, 125mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke125 mm
- Stroke adjust-10 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X125-10S
The SCJ50X125-10S is a 50 mm bore, single-rod double-acting AirTAC cylinder offering a 125 mm nominal stroke with a 10 mm field-adjustable range via a rear-cap screw. This configuration delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a precise actuator for applications where the stroke end must be fine-tuned during commissioning or changeovers without swapping the cylinder.
This model includes a built-in magnet (-S suffix), allowing direct mounting of CMSG/DMSG/EMSG sensors on the tie-rod barrel for reliable end-of-stroke or mid-stroke position feedback. With a 20 mm piston rod, PT1/4 ports, and a 21 mm air cushion, the cylinder body length A(SCJ) is 194 mm, providing a compact yet robust solution for adjustable linear motion.
Airtac SCJ50 Standard Cylinder SCJ50X125-10S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X125-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 125 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 SCJ50X125-10S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×125 | 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 SCJ50X125-10S Is Used
Commissioning & Setup
Fine-tune the end-of-stroke position during initial machine setup without mechanical stops, using the 10 mm rear adjustment to perfectly align with mating components.
Format Changeovers
Quickly adapt the stroke for different product sizes on packaging or sorting lines, reducing downtime between batches with a simple screw adjustment.
Wear Compensation
Adjust the stroke end to compensate for tooling or pad wear over time, maintaining consistent pressing or clamping depth without replacing the actuator.
Is the Airtac SCJ50 Standard Cylinder SCJ50X125-10S the Right Cylinder?
Select the SCJ50X125-10S when you need to dial in a precise stroke end within a 10 mm window on a 50 mm bore platform. If the push force is insufficient, stepping up to a 63 mm bore (SCJ63) provides 1559 N at 0.5 MPa; for a lighter, more compact design, the 40 mm bore (SCJ40) offers 628 N. This adjustable-stroke unit is ideal over a fixed-stroke SC when the process requires frequent minor stroke adjustments. For a direct replacement, match the 50 mm bore, 125 mm nominal stroke, 10 mm adjust range, PT port thread, basic mounting, and the integrated magnet for sensor compatibility.
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 SCJ50X125-10S FAQ
At the standard 0.5 MPa operating pressure, it generates 982 N of push force and 825 N of pull force. The maximum push force at 0.9 MPa is 1767 N. The push force is greater than the pull force because it is a single-rod cylinder.
Yes, if you need the 10 mm field-adjustable stroke feature. It directly replaces a fixed-stroke SC of the same 50 mm bore and 125 mm stroke, provided the mounting (basic), port thread (PT), and magnet option (S) match. The body length is slightly longer to accommodate the adjusting screw.
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