Airtac SCJ50 Standard Cylinder SCJ50X175-50STC
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X175-50STC 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. Ø50mm bore, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ50 mm
- Nominal stroke175 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X175-50STC
The SCJ50X175-50STC is a double-acting, single-rod pneumatic cylinder with a 50mm bore and a nominal 175mm stroke, featuring a rear adjusting screw that provides a 50mm field-adjustable range for fine-tuning the stroke end position. With a 20mm diameter piston rod and PT1/4 ports, it delivers 982 N of push force and 825 N of pull force at 0.5 MPa, scaling up to 1767 N of push force at the maximum operating pressure of 0.9 MPa.
This model includes a built-in magnet (S suffix) for direct mounting of CMSG/DMSG/EMSG sensors, and is configured with a centre trunnion (TC suffix) for pivoting applications, supplied with the TCM1 bracket. The adjustable cushion and tie-rod construction make it ideal for commissioning and format changeovers where the end-stop needs precise, repeatable adjustment without swapping the cylinder.
Airtac SCJ50 Standard Cylinder SCJ50X175-50STC Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X175-50STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 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 | 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 SCJ50X175-50STC
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | 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 SCJ50 Standard Cylinder SCJ50X175-50STC Is Used
Commissioning & Setup
The 50mm adjustment range allows engineers to precisely dial in the end-stop during initial machine commissioning, accommodating stack-up tolerances without needing to machine custom spacers or swap cylinders.
Format Changeovers
Ideal for packaging or assembly lines that run multiple product sizes. Operators can quickly adjust the stroke end to suit a new format, reducing downtime between batches.
Wear Compensation
In clamping or pressing operations, the adjustable screw can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent contact force and position.
Is the Airtac SCJ50 Standard Cylinder SCJ50X175-50STC the Right Cylinder?
Choose the SCJ50X175-50STC when your application requires a mid-range force of 982 N push at 0.5 MPa and the ability to trim the stroke end by up to 50mm on the machine. If you need more force, stepping up to a 63mm bore provides 1559 N of push force; for a lighter, more compact solution, the 40mm bore offers 628 N. The centre trunnion mount is the correct choice for loads that need to pivot during the stroke.
For a direct replacement, match the 50mm bore, 175mm nominal stroke, 50mm adjust range, PT port thread, and the TC mounting configuration with the F-SC50TC trunnion kit. Since this stroke exceeds 150mm, ensure the load is guided externally to prevent side-loading and rod bending. If the stroke length is fixed and will never need adjustment, a standard SC fixed-stroke cylinder is a simpler, more cost-effective alternative.
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 SCJ50 Standard Cylinder SCJ50X175-50STC FAQ
The rear cap has an adjusting screw that limits how far the piston retracts, effectively shortening the stroke end by up to 50mm. The nominal 175mm stroke is the maximum; you can reduce it to any point down to 125mm. It does not change the cylinder's force output or extend stroke.
At the standard 0.5 MPa operating pressure, the push force is 982 N and the pull force is 825 N (lower due to the 20mm rod area). At the maximum 0.9 MPa operating pressure, the push force reaches 1767 N.
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