The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X160-50S 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. Ø250mm bore, 160mm nominal stroke, PT1" ports and adjustable end cushioning.
The SCJ250X160-50S is a heavy-duty, double-acting single-rod cylinder with a 50mm field-adjustable stroke end, allowing operators to fine-tune the piston's stop position without removing the unit. With a 50mm rod and a push force of 24544 N at 0.5 MPa, this tie-rod cylinder is built for large-scale industrial automation tasks that demand precise end-point calibration.
This model includes a built-in magnet (-S), enabling direct mounting of CMSG/DMSG/EMSG sensors for reliable position feedback. The body length A(SCJ) is 409 mm, and it features a 40 mm air cushion to decelerate high-inertia loads smoothly at the end of travel.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X160-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 50 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. |
| -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.
Fine-tune the end-of-stroke position during initial machine setup by up to 50mm, eliminating the need for shims or hard stops on large assembly fixtures.
Adjust the stopping point for pallets or heavy components on a conveyor line to accommodate different product sizes without swapping the cylinder.
Compensate for tooling wear or material thickness variations in hydraulic-pneumatic clamping systems by dialing the stroke end forward.
Select this 250mm bore for applications requiring a push force of 24544 N at 0.5 MPa. If your force requirement is lower, stepping down to the 200mm bore provides 15708 N of push force. The 50mm adjustable stroke range is ideal for commissioning and format changeovers, but if a fixed stroke is sufficient, the standard SC series eliminates the rear adjustment mechanism. For this 160mm stroke, ensure the load is guided externally if significant side forces are present, as the single rod is not designed to bear lateral loads.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N. The maximum theoretical force at 1.0 MPa is 5006 kgf. The push force is greater than the pull force because it is a single-rod cylinder.
Yes, if your existing cylinder is an AirTAC SCJ250 with a 160mm nominal stroke and a 50mm adjust range. Ensure the port thread (PT), mounting style, and magnet option match. The adjusting screw sets the stroke end position, not the cylinder's force.
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