Airtac SCJ40 Standard Cylinder SCJ40X160-75
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X160-75 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, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke160 mm
- Stroke adjust-75 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X160-75
The SCJ40X160-75 is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides up to 75 mm of field-adjustable stroke-end control. 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 where the retract position must be precisely tuned without swapping the cylinder or adding external hard stops.
This genuine AirTAC SCJ unit has a PT1/4 port, M12x1.25 rod thread, and a 21 mm air cushion for smooth deceleration. Its tie-rod body length A(SCJ) is 185 mm. The adjustable screw only sets the stroke end position; it does not alter the cylinder's force output or maximum speed range of 30-800 mm/s.
Airtac SCJ40 Standard Cylinder SCJ40X160-75 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X160-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 160 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 SCJ40X160-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×160 | 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 SCJ40X160-75 Is Used
Format Changeover Stops
On packaging or filling lines, the 75 mm adjustment range lets operators quickly dial in a new retract position for different product sizes without mechanical rework, minimizing downtime during batch changes.
Commissioning & Fine-Tuning
During machine commissioning, the rear screw allows engineers to experimentally determine the optimal stroke end for a clamp or ejector, then lock it in place, eliminating the need to stock multiple fixed-stroke cylinders for trials.
Wear Compensation
In high-cycle pressing or clamping fixtures, the adjustable stroke can be periodically shortened to compensate for pad or tooling wear, maintaining consistent contact force without replacing the entire actuator.
Is the Airtac SCJ40 Standard Cylinder SCJ40X160-75 the Right Cylinder?
Step up to a 50 mm bore SCJ for 982 N of push force at the same 0.5 MPa pressure if your load exceeds the 40 mm bore's 628 N capacity. For lighter, more compact needs, the 32 mm bore SCJ offers 402 N. If your application does not require stroke-end adjustability, a fixed-stroke SC40X160 cylinder is a simpler, more cost-effective alternative. When replacing this unit, match the bore (40 mm), nominal stroke (160 mm), adjust range (-75), and PT port thread exactly.
For this 160 mm stroke length, ensure the load is guided to prevent excessive side-loading and rod bending. If external guides are impractical, consider a guided cylinder or an SCT multi-position unit instead.
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 SCJ40X160-75 FAQ
At the standard 0.5 MPa operating pressure, this 40 mm bore cylinder produces 628 N of push force (full bore area) and 528 N of pull force (rod-side area deducted). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N. The adjustable stroke screw does not change these force values.
Yes, provided the bore (40 mm), port size (PT1/4), and mounting style match. The SCJ40X160-75 has a nominal maximum stroke of 160 mm, but its rear screw can shorten the stroke end by up to 75 mm. Ensure your application has clearance for the slightly longer body length A(SCJ) of 185 mm compared to a fixed-stroke SC.
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