The AirTAC Airtac SCJ250 Standard Cylinder SCJ250X1000-30S 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, 1000mm nominal stroke, PT1" ports and adjustable end cushioning.
The AirTAC SCJ250X1000-30S is a large-bore, double-acting single-rod cylinder engineered for heavy industrial applications where a 1000 mm nominal stroke must be precisely tuned on-site. Its rear-cap adjusting screw provides a 30 mm field-adjustable range to shorten the stroke end, eliminating the need for external hard stops during commissioning or format changes. With a 50 mm piston rod and a 24544 N push force at 0.5 MPa, it delivers substantial power for pressing, clamping, and material handling tasks.
This model features a built-in magnet (suffix -S), allowing direct mounting of CMSG/DMSG/EMSG sensors along the tie-rod barrel for reliable, non-contact position feedback. The cylinder body length A(SCJ) is 409 mm, and it includes an adjustable air cushion for smooth deceleration. As an ISO 6430 class tie-rod cylinder, it operates on 40 µm filtered air from 0.15 to 1.0 MPa, with a maximum push force of 44178 N at 0.9 MPa.
| Model | Airtac SCJ250 Standard Cylinder SCJ250X1000-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder (ISO 6430 class) |
| Bore size | Ø250 mm |
| Nominal stroke | 1000 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. |
| ×1000 | 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.
Fine-tune the 1000 mm stroke end by up to 30 mm during initial machine setup, allowing engineers to dial in the exact stopping position for large-scale pressing or forming operations without mechanical modifications.
Quickly adjust the cylinder's end stop to accommodate different product sizes on heavy-duty conveyors or palletizing systems, minimizing downtime during batch changes with the 24544 N push force at 0.5 MPa.
Compensate for tooling wear or material compression over time in high-cycle clamping fixtures. The 30 mm screw adjustment maintains consistent clamping force without replacing the 50 mm rod cylinder.
Select the SCJ250X1000-30S when you need a 1000 mm stroke with the ability to fine-tune the end position by up to 30 mm in heavy-duty applications. If your force requirement is lower, stepping down to a 200 mm bore reduces push force to 15708 N at 0.5 MPa, which may be sufficient for medium-duty tasks. For applications needing a fixed, unchangeable stroke, the standard SC series is a simpler alternative; if the load requires external guidance due to the long 1000 mm stroke, consider pairing this cylinder with an external guide rail or switching to a guided cylinder to prevent rod bending under side loads.
To replace an existing unit, match the SCJ250 bore, 1000 mm nominal stroke, and 30 mm adjust range exactly. This S-suffix model requires a magnet-equipped replacement for sensor compatibility. The basic mount configuration uses the cylinder body directly, but if a pivot mount is needed, the F-SC250TC trunnion kit is available. The standard PT port thread must also be confirmed for a direct fit.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 24544 N and the pull force is 23562 N due to the 50 mm piston rod reducing the effective area on the return stroke. The maximum push force at the 0.9 MPa operating limit is 44178 N.
Yes, if your old cylinder did not have a magnet. The -S suffix adds a built-in magnet for mounting CMSG/DMSG/EMSG sensors. It is mechanically and dimensionally identical to a non-magnet SCJ250X1000-30, so it will fit the same mounting points and air ports, but now enables electronic position sensing.
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