Airtac SCJ50 Standard Cylinder SCJ50X350-50SH
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X350-50SH 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, 350mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke350 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X350-50SH
The SCJ50X350-50SH is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, offering a 50 mm adjustment range via a rear-cap screw. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa and up to 1767 N at 0.9 MPa, making it a strong mid-range actuator for applications needing precise end-position tuning without swapping the cylinder.
This model is configured with a built-in magnet (-S) for direct mounting of CMSG/DMSG/EMSG sensors, and a Viton (FKM) seal (-H) that extends the operating temperature range to 0–150°C, ideal for hot or aggressive environments. The body length A(SCJ) is 194 mm, and the standard PT1/4 ports ensure straightforward pneumatic connections.
Airtac SCJ50 Standard Cylinder SCJ50X350-50SH Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X350-50SH |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 350 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 SCJ50X350-50SH
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×350 | 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 SCJ50X350-50SH Is Used
Hot-Environment Format Changeover
In packaging or thermoforming machines operating at elevated temperatures, the Viton seals handle the heat while the 50 mm adjustment screw allows operators to quickly dial in a new stroke end for different product sizes without downtime.
Wear Take-Up on Clamping Jigs
For assembly fixtures where tooling or pads wear down over time, the 50 mm adjustable stroke lets technicians compensate for material loss by extending the cylinder's end position, maintaining consistent clamping force without replacing the actuator.
Commissioning & Sensor Calibration
During machine commissioning, the built-in magnet and 50 mm fine-adjustment range enable precise end-position calibration with CMSG/DMSG sensors, allowing engineers to perfectly synchronize the 350 mm stroke with other automated sequences.
Is the Airtac SCJ50 Standard Cylinder SCJ50X350-50SH the Right Cylinder?
Choose this SCJ50X350-50SH when you need a mid-bore actuator with a long 350 mm stroke and the ability to fine-tune the stroke end by up to 50 mm on the machine, especially in high-temperature settings. If 982 N of push force at 0.5 MPa is insufficient, stepping up to a 63 mm bore provides 1559 N; if it is more than needed, a 40 mm bore delivers 628 N. For applications requiring a fixed, non-adjustable stroke, the standard SC series is a simpler alternative.
As a direct replacement, match an AirTAC SCJ cylinder with a 50 mm bore, 350 mm nominal stroke, a 50 mm adjust range, PT ports, and the Viton seal and magnet options. Given the 350 mm stroke length, be mindful of potential rod bending under high side loads; using an external guide rail or switching to a guided cylinder assembly is recommended to protect the rod and bearing from premature wear.
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 SCJ50X350-50SH FAQ
Being a single-rod cylinder, 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. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 200 kgf. The 50 mm stroke adjustment does not alter these force values.
Yes, provided the bore (50 mm), maximum stroke (350 mm), and port thread (PT) match. The SCJ body is slightly longer to house the adjusting screw, so verify the available space. The -S magnet and -H Viton seal on this model must also be matched if your application uses sensors or operates above 70°C.
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