The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X160-30S 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. Ø250mm bore, 160mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X160-30S is a double-acting, single-rod pneumatic cylinder from the AirTAC SCJ adjustable-stroke family. With a 250 mm bore and a 160 mm nominal stroke, it delivers a substantial 24544 N of push force at 0.5 MPa, making it suitable for heavy pressing, clamping, and forming operations. The rear-cap adjusting screw provides a 30 mm field-adjustable range, allowing operators to fine-tune the stroke end position without removing the cylinder from the machine.
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 reliable end-of-stroke detection. As an ISO 6430 class cylinder, it features a 50 mm diameter piston rod, a G1 inch port, and a 40 mm adjustable air cushion for smooth deceleration. The body length A(SCJ) is 409 mm, and the standard operating speed for this bore class is 30-500 mm/s.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X160-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 30 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1" |
| Rod thread | M42×2 |
| 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 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
| Max stroke | Up to 1500 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 | 24544 N | 23562 N |
| 0.7 MPa | 34361 N | — |
| Max (@1.0 MPa) | 5006 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. |
|---|---|
| 250 | Bore size in mm. |
| ×160 | 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 the setup of a large hydraulic-style pneumatic press, the 30 mm adjustment screw allows technicians to precisely set the final pressing depth for consistent part forming without needing to fabricate custom mechanical stops.
In a lumber or steel processing line, operators can quickly adjust the stroke end to accommodate different material thicknesses, ensuring the clamping or cutting head engages correctly for each new batch.
For high-cycle stamping or riveting fixtures, the adjustable stroke compensates for tooling wear over time. The stroke can be incrementally extended to maintain consistent contact pressure without replacing the entire actuator.
Select the SCJ250X160-30S when your application demands high force with the flexibility to dial in the final stroke position during commissioning or changeovers. If your force requirement is slightly lower, the SCJ200 bore provides 15708 N of push at 0.5 MPa, while stepping up is not possible within the standard SCJ range. For applications where the stroke must remain absolutely fixed after setting, a standard SC fixed-stroke cylinder is a simpler alternative.
For a direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with a 250 mm bore, a 160 mm nominal stroke, a 30 mm adjustment range, PT port threads, and the built-in magnet option. If the 160 mm stroke creates a significant side load on the 50 mm rod, consider pairing the cylinder with an external linear guide or switching to a guided cylinder assembly to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. The push force is higher because the single piston rod reduces the effective area on the return stroke. The maximum theoretical force at 1.0 MPa is 5006 kgf.
Yes, provided the bore (250 mm), port thread (PT), and mounting style match. The SCJ body is slightly longer to house the adjustment mechanism, so verify the available space. The SCJ allows you to fine-tune the stroke end, which is a key upgrade over a fixed-stroke SC for applications requiring flexibility.
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