Airtac SCJ40 Standard Cylinder SCJ40X175-50STC
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X175-50STC 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke175 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X175-50STC
The SCJ40X175-50STC is a 40 mm bore double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw lets you fine-tune the final stroke position across a 50 mm range, making it ideal for commissioning trials or format changeovers where the exact end-stop needs to be dialled in on the machine. With a 16 mm diameter piston rod and PT1/4 ports, it delivers 628 N of push force at 0.5 MPa.
This model is factory-equipped with a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG sensors, and a centre trunnion pivot (TC) that ships with the TCM1 bracket, allowing the cylinder to swing for pivoting load applications. The body length A(SCJ) is 185 mm, and the adjustable cushion provides smooth deceleration at the stroke end. It is a genuine AirTAC tie-rod cylinder, not an ISO 15552 profile unit.
Airtac SCJ40 Standard Cylinder SCJ40X175-50STC Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X175-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 175 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 SCJ40X175-50STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×175 | 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 SCJ40X175-50STC Is Used
Commissioning & Setup
The 50 mm adjustment range allows technicians to precisely dial in the stroke end during machine commissioning, eliminating the need to shim or reposition the cylinder body for fine positional changes.
Format Changeovers
On packaging or sorting lines, the adjustable stroke lets operators quickly adapt the cylinder's push distance for different product sizes, reducing downtime between batches without swapping hardware.
Wear Compensation
In high-cycle clamping or pressing fixtures, the stroke-end screw can be advanced over time to compensate for tooling or pad wear, maintaining consistent contact force without reprogramming the machine.
Is the Airtac SCJ40 Standard Cylinder SCJ40X175-50STC the Right Cylinder?
Choose the SCJ40 when you need a mid-range force of 628 N push at 0.5 MPa and the ability to shorten the stroke end by up to 50 mm without replacing the cylinder. If you require more force, step up to the SCJ50 which provides 982 N push; for a lighter, more compact solution, the SCJ32 offers 402 N. If your application does not require stroke adjustability, a fixed-stroke SC40 cylinder is a simpler, cost-effective alternative.
For direct replacement, match the 40 mm bore, 175 mm nominal stroke, 50 mm adjust range, PT1/4 ports, centre trunnion (TC) mount, and the magnet (-S) sensor option. The F-SC40TC mounting kit is included. For this 175 mm stroke, ensure the rod is not subjected to excessive side loads; if lateral forces are present, consider an external guide rail or 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 (-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 SCJ40X175-50STC FAQ
At the standard operating pressure of 0.5 MPa, this single-rod cylinder generates 628 N of push force on the full bore area and 528 N of pull force on the annulus side. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 1280 N.
Yes, if your existing cylinder is an AirTAC SCJ40 with a 175 mm nominal stroke, a 50 mm adjustable range, PT1/4 ports, centre trunnion (TC) mount, and a magnet for sensors. The SCJ is a tie-rod cylinder, so it is a direct dimensional match for another SCJ with the same specifications, but it is not interchangeable with ISO 15552 profile cylinders.
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