The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X175-50S 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X175-50S is a double-acting, single-rod pneumatic cylinder with a rear adjusting screw that provides a 50 mm field-adjustable stroke end. This allows fine-tuning of the piston stop position without changing the cylinder, ideal for commissioning and format changeovers. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force at 0.5 MPa, making it a capable actuator for medium-duty automation tasks.
This model includes a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for precise end-of-stroke or mid-stroke position feedback. The body length A(SCJ) is 185 mm, and the standard PT1/4 ports ensure straightforward pneumatic connection. Its adjustable cushion decelerates the piston smoothly, protecting the end cap and reducing noise.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X175-50S |
|---|---|
| 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.
| 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.
| 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.
The 50 mm adjustment range lets technicians fine-tune the end stop during initial machine setup without swapping cylinders or machining hard stops, accelerating commissioning.
Quickly adapt a pusher or stop gate to a new product size on a packaging line by adjusting the rear screw, minimizing downtime between production runs.
In clamping or pressing fixtures, the adjustable stroke can be extended over time to compensate for tooling or pad wear, maintaining consistent clamping force without mechanical shims.
Choose the SCJ40X175-50S when you need to dial in a precise stroke end position within a 50 mm window on a 175 mm nominal stroke. If your force requirements increase, stepping up to the SCJ50 series provides 982 N of push at 0.5 MPa. For applications where the stroke setting will never change, a fixed-stroke SC40X175 cylinder is a simpler, cost-effective alternative.
As a direct replacement, match this model with another AirTAC SCJ adjustable-stroke cylinder of 40 mm bore, 175 mm nominal stroke, 50 mm adjust range, PT ports, and a built-in magnet. For strokes of 300 mm or more, assess side-loading on the 16 mm rod; an external guide rail or a guided cylinder may be necessary to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the push force is 628 N and the pull force is 528 N. The maximum push force at 0.9 MPa is 1130 N. Because it is a single-rod cylinder, the push force is greater than the pull force due to the area of the 16 mm rod.
Yes, if you need field adjustability. The SCJ40X175-50S has the same 40 mm bore and mounting footprint as an SC40, but its body is slightly longer to house the adjusting screw. Ensure the 50 mm adjustment range fits your space and that you match the magnet option and port thread for a drop-in replacement.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.