Airtac SCJ40 Standard Cylinder SCJ40X150-75S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X150-75S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø40mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke150 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X150-75S
The SCJ40X150-75S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, allowing operators to fine-tune the 150 mm nominal stroke by up to 75 mm using the rear-cap adjusting screw. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force at 0.5 MPa, making it a versatile actuator for applications requiring on-machine stroke calibration without cylinder replacement.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for reliable end-of-stroke or mid-position sensing. The standard TPU seal operates from -20 to +70 °C, and the PT1/4 port supplies the 21 mm air cushion for smooth deceleration.
Airtac SCJ40 Standard Cylinder SCJ40X150-75S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X150-75S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 75 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M12×1.25 |
| 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 SCJ40 Standard Cylinder SCJ40X150-75S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -75 | 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 SCJ40 Standard Cylinder SCJ40X150-75S Is Used
Commissioning & Setup
The 75 mm adjustment range lets technicians precisely set the stroke end during initial machine setup, compensating for assembly tolerances without shims or custom stops.
Product Changeover
Easily re-adjust the stroke when switching between product sizes on a packaging or sorting line, reducing downtime compared to swapping fixed-stroke cylinders.
Wear Compensation
As tooling or gripper pads wear over time, the adjusting screw can be turned to restore the exact end position, maintaining process consistency.
Is the Airtac SCJ40 Standard Cylinder SCJ40X150-75S the Right Cylinder?
Choose the SCJ40X150-75S when you need to dial in the stroke end during commissioning or changeover. If 628 N of push force is marginal, stepping up to an SCJ50 bore provides 982 N at the same 0.5 MPa. For fixed-stroke applications where adjustability is not required, the standard SC series is a simpler alternative. This cylinder is a direct replacement for another AirTAC SCJ40 with a 150 mm nominal stroke, 75 mm adjust range, PT ports, and a magnet.
At a 150 mm stroke, the rod is well-supported, but if the load applies a significant side force, pair the cylinder with an external linear guide or consider a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ 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 SCJ40 Standard Cylinder SCJ40X150-75S FAQ
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum push force at the 0.9 MPa operating limit is 1130 N. The pull force is lower due to the 16 mm piston rod reducing the effective area on the retract side.
A rear-cap screw sets the stroke end position within a 75 mm range, shortening the 150 mm nominal stroke. It is a mechanical stop, not a position lock. The piston will drift if air pressure is lost; an external rod brake or pilot-operated check valve is required to hold a load without live pressure.
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