Airtac SCJ50 Standard Cylinder SCJ50X175-30S
The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X175-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 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-30 mm
- Port sizePT1/4
- Rod threadM16×1.5
- CushionAdjustable, 21 mm
About the Airtac SCJ50 Standard Cylinder SCJ50X175-30S
The SCJ50X175-30S is a double-acting, single-rod pneumatic cylinder that puts stroke-end fine-tuning at your fingertips. Its rear-cap adjusting screw provides a 30 mm adjustable range, letting you dial in the exact stop position without changing the cylinder or adding external hard stops. With a 50 mm bore and 20 mm rod, it delivers a robust 982 N of push force at 0.5 MPa, making it a workhorse for mid-range automation tasks.
This model includes a built-in magnet (-S), so you can directly mount CMSG, DMSG, or EMSG sensors along the tie-rod barrel for reliable, non-contact position sensing. The standard TPU seals and PT ports keep it ready for filtered-air service from -20 to +70 °C. The adjustable cushion decelerates the piston smoothly, and the body length A(SCJ) is 194 mm, providing a compact envelope for its 175 mm nominal stroke.
Airtac SCJ50 Standard Cylinder SCJ50X175-30S Technical Specifications
| Model | Airtac SCJ50 Standard Cylinder SCJ50X175-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 175 mm |
| Stroke adjustment | Up to 30 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 SCJ50X175-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×175 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ50X175-30S Is Used
Commissioning & Setup
Fine-tune the stroke end position during machine commissioning without swapping cylinders. The 30 mm adjustment range allows engineers to quickly dial in the perfect actuator throw for new tooling or processes.
Product Changeover
Ideal for packaging or assembly lines running multiple product sizes. Operators can adjust the cylinder stroke to match a new format in seconds, minimizing downtime between batches.
Wear Compensation
In high-cycle clamping or pressing applications, the adjustable screw can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent performance without replacing parts.
Is the Airtac SCJ50 Standard Cylinder SCJ50X175-30S the Right Cylinder?
Choose the SCJ50X175-30S when you need field-adjustable stroke control in the 982 N push force class. If your application demands more force, stepping up to a 63 mm bore provides 1559 N of push at the same 0.5 MPa pressure. For applications where the stroke is fixed and never needs adjustment, a standard SC50X175 cylinder is a simpler, more cost-effective alternative. This SCJ model is a direct replacement for an existing AirTAC SCJ50X175-30S with a magnet, PT ports, and basic mounting. For strokes of 300 mm or more, evaluate side-loading and rod bending; an external guide or a guided cylinder may be required to protect the rod and seals.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ50X175-30S FAQ
A rear-cap adjusting screw limits the piston's retraction, effectively shortening the stroke end by up to 30 mm from the nominal 175 mm. You simply turn the screw to set the desired stop position, which is a mechanical limit—it does not adjust air pressure or speed.
At the standard operating pressure of 0.5 MPa, the push force is 982 N and the pull force is 825 N. The push force is higher because the single rod reduces the piston area on the pull side. The maximum push force at 0.9 MPa is 1767 N.
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