Airtac SCJ50 Standard Cylinder SCJ50X150-50H
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X150-50H 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 SCJ50X150-50H
The SCJ50X150-50 is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides a 50 mm field-adjustable stroke-end range. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, making it a versatile mid-range actuator for tasks like pressing, clamping, and material handling where the final stop position needs fine-tuning during commissioning or changeovers.
This model is equipped with Viton (FKM) seals, extending its operating temperature range to 0–150 °C, which suits it for hot environments or applications with aggressive media where standard TPU would degrade. The body length A(SCJ) is 194 mm, and the adjustable air cushion decelerates the piston smoothly at the end of its stroke. The port is PT1/4, and the rod thread is M16×1.5.
Airtac SCJ50 Standard Cylinder SCJ50X150-50H Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X150-50H |
|---|---|
| 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 SCJ50X150-50H
| 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 SCJ50X150-50H Is Used
Commissioning & Setup
Fine-tune the end position of a pusher or stop gate on a new assembly line without needing to machine custom spacers or order multiple fixed-stroke cylinders.
Format Changeovers
Quickly adjust the stroke of a labeling or packaging machine's applicator arm when switching between product sizes, minimizing downtime between batches.
Wear Compensation
Compensate for the gradual wear of a brake pad or friction material in a tensioning device by incrementally advancing the stroke end with the rear screw.
Is the Airtac SCJ50 Standard Cylinder SCJ50X150-50H the Right Cylinder?
Choose the SCJ50X150-50 when you need to dial in a precise stroke end without swapping the cylinder. If 982 N of push force at 0.5 MPa is insufficient, stepping up to the SCJ63 bore provides 1559 N of push force. For applications requiring a fixed, unchangeable stroke, the standard SC series is a simpler, more cost-effective choice. This cylinder is a direct replacement for another AirTAC SCJ50 with a 150 mm nominal stroke, a 50 mm adjust range, PT ports, and Viton seals. For strokes of 150 mm, side-loading is generally minimal, but if the rod is subjected to significant radial forces, consider adding an external guide rail or switching to a guided cylinder.
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 SCJ50X150-50H FAQ
At the standard operating pressure of 0.5 MPa, the push force is 982 N and the pull force is 825 N. The maximum push force at 0.9 MPa is 1767 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
Yes, if you need the 50 mm stroke-end adjustability. The SCJ shares the same bore, rod, and port dimensions as the SC series. Ensure your mounting and port thread (PT) match, and note that the SCJ body is slightly longer to accommodate the adjusting screw mechanism.
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