Airtac SCJ50 Standard Cylinder SCJ50X150-40
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X150-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 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-40 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X150-40
The SCJ50X150-40 provides a nominal 150 mm stroke with a 40 mm rear-end adjustment range, letting you fine-tune the stroke end position on the machine without changing the cylinder. Its 20 mm piston rod and PT1/4 ports deliver a push force of 982 N at 0.5 MPa, rising to 1767 N at the maximum operating pressure of 0.9 MPa.
This double-acting, single-rod cylinder uses an integrated adjusting screw in the rear cap, which shortens the stroke end by up to 40 mm. The body length A is 194 mm plus stroke, and the 21 mm air cushion at each end decelerates the piston smoothly. It is a genuine AirTAC product built for repeatable, field-configurable positioning.
Airtac SCJ50 Standard Cylinder SCJ50X150-40 Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X150-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 40 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 SCJ50X150-40
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ50X150-40 Is Used
Commissioning Fine-Tuning
Dial in the exact end-stop position during machine setup by turning the rear adjusting screw, avoiding the need to shim or reposition external hard stops.
Format Changeovers
Quickly adapt the stroke end for different product sizes on a packaging or assembly line, reducing changeover time between batches.
Wear Compensation
Take up mechanical play or tooling wear over time by slightly extending the effective stroke, maintaining consistent part contact without replacing the cylinder.
Is the Airtac SCJ50 Standard Cylinder SCJ50X150-40 the Right Cylinder?
Choose the SCJ50X150-40 when you need to dial in an end position during commissioning or after tooling wear, without swapping to a different fixed-stroke cylinder. If 982 N of push force at 0.5 MPa is marginal, stepping up to the 63 mm bore provides 1559 N. For applications requiring a fixed, non-adjustable stroke, the standard SC50X150 is a direct alternative. To replace this unit, match the 50 mm bore, 150 mm nominal stroke, 40 mm adjust range, PT1/4 ports, and basic mounting style.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ50X150-40 FAQ
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The push force increases to 1767 N at the maximum operating pressure of 0.9 MPa. Because it is a single-rod cylinder, the pull force is lower due to the rod area.
Yes, the SCJ50X150-40 shares the same bore, port size, and mounting interfaces as the SC series. Ensure the 40 mm adjustment range suits your application, and match the mounting type and magnet option if your original cylinder had them.
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