Airtac SCJ40 Standard Cylinder SCJ40X180-50S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X180-50S 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. Ø40mm bore, 180mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke180 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X180-50S
The SCJ40X180-50S brings field-adjustable stroke control to a 40 mm bore double-acting cylinder, delivering 628 N of push force at 0.5 MPa. Its rear-cap screw provides a 50 mm adjustment range, letting you fine-tune the stroke end position for commissioning trials or format changes without swapping the cylinder.
This model includes a built-in magnet, so CMSG/DMSG/EMSG sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. With a 16 mm rod, PT1/4 ports, and a 21 mm air cushion, it handles speeds up to 800 mm/s while the body length A(SCJ) is 185 mm.
Airtac SCJ40 Standard Cylinder SCJ40X180-50S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X180-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 180 mm |
| Stroke adjustment | Up to 50 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 SCJ40X180-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×180 | 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 SCJ40 Standard Cylinder SCJ40X180-50S Is Used
Commissioning & Setup
The 50 mm adjustment screw lets technicians fine-tune the actuator end-stop on a new machine during runoff, eliminating the need to stock multiple fixed-stroke cylinders for trial-and-error positioning.
Format Changeover
On packaging or assembly lines, operators can quickly adjust the stroke end to accommodate different product sizes or box heights, reducing changeover downtime between batches.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke takes up mechanical wear over time, maintaining consistent contact pressure without reprogramming the machine controller.
Is the Airtac SCJ40 Standard Cylinder SCJ40X180-50S the Right Cylinder?
Choose the SCJ40X180-50S when you need to dial in the stroke end on a 40 mm bore platform. If your force requirement grows, the 50 mm bore SCJ offers 982 N push at 0.5 MPa; for lighter loads, the 32 mm bore provides 402 N. The adjustable stroke is ideal for applications where the exact stop position must be verified during setup—if the stroke is permanently fixed, a standard SC cylinder is a simpler, lower-cost alternative.
For a direct replacement, match the 40 mm bore, 180 mm nominal stroke, 50 mm adjust range, PT ports, basic mounting, and the -S magnet option. At this 180 mm stroke, rod deflection is minimal, but if side loads are present, consider an external guide rail to protect the rod bearing.
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 SCJ40 Standard Cylinder SCJ40X180-50S FAQ
At 0.5 MPa it generates 628 N pushing and 528 N pulling. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The pull force is lower because the 16 mm rod reduces the effective piston area on the return stroke.
Yes, provided the bore (40 mm), port thread (PT1/4), and mounting style match. The SCJ body is slightly longer to house the adjusting screw, so check the 185 mm A(SCJ) dimension against your available space. You must also match the -S magnet if your application uses sensors.
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