The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X275-30S 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, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X275-30S is a double-acting, single-rod pneumatic cylinder from AirTAC, featuring a 50 mm bore and a nominal stroke of 275 mm. Its defining characteristic is a rear-cap adjusting screw that provides a 30 mm field-adjustable range, allowing the stroke end position to be fine-tuned on the machine. This model includes a built-in magnet (-S), enabling direct mounting of CMSG/DMSG/EMSG sensors for reliable end-of-stroke detection.
With a 20 mm diameter piston rod and PT1/4 ports, this cylinder delivers a push force of 982 N at 0.5 MPa and up to 1767 N at 0.9 MPa. The pull force is 825 N at 0.5 MPa, reflecting the single-rod design. It features an adjustable pneumatic cushion (21 mm length) for smooth deceleration and a body length A(SCJ) of 194 mm. The standard operating speed range is 30-800 mm/s.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X275-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 275 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.
| 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.
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 50 | Bore size in mm. |
| ×275 | 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.
During machine setup, the 30 mm adjusting screw allows engineers to precisely dial in the actuator's end stop to match tooling or workpiece variations without needing to re-plumb or replace the cylinder.
On packaging lines, the adjustable stroke enables rapid mechanical adjustment for different box or product sizes. The built-in magnet provides sensor feedback to the PLC for each new format position.
In clamping or pressing fixtures, the stroke can be incrementally extended over time to compensate for pad or tooling wear, maintaining consistent contact force without reprogramming the machine.
Choose the SCJ50X275-30S when you need to precisely dial in a stroke end position during commissioning or changeovers without swapping the cylinder. For applications requiring more force, stepping up to a 63 mm bore provides 1559 N of push force at 0.5 MPa. If a fixed, non-adjustable stroke is sufficient, the standard SC series offers a simpler, more cost-effective alternative. This cylinder is a direct replacement for another AirTAC SCJ with a 50 mm bore, 275 mm nominal stroke, 30 mm adjust range, PT ports, and a magnet.
For this 275 mm stroke, be mindful of side loads. If the rod is not guided externally, bending moments can shorten seal life. For unsupported loads, consider adding an external guide rail or switching to a guided cylinder assembly to ensure reliable operation.
Adjustable-stroke checklist
The push force is 982 N at 0.5 MPa and 1767 N at the maximum operating pressure of 0.9 MPa. The pull force on the return stroke is lower, at 825 N at 0.5 MPa, due to the area of the 20 mm piston rod.
A rear adjusting screw limits the piston's travel, shortening the stroke end by up to 30 mm from the 275 mm nominal maximum. It is a direct mechanical replacement for an AirTAC SCJ of the same bore, nominal stroke, and adjust range, but it is not a drop-in substitute for a fixed-stroke SC cylinder because the body length A(SCJ) is 194 mm, which is longer.
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.