The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X30-10S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 10 mm range without swapping the cylinder. Ø40mm bore, 30mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X30-10S is a double-acting, single-rod pneumatic cylinder that delivers 628 N of push force at 0.5 MPa, making it a capable mid-range actuator for tasks requiring a compact footprint. Its key feature is the rear-cap adjusting screw, which provides a 10 mm field-adjustable stroke range, allowing you to fine-tune the piston's end position without removing the cylinder or adding external hard stops.
This model includes a built-in magnet (denoted by the -S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for precise position feedback. The 16 mm diameter piston rod and PT1/4 port ensure solid flow and mechanical rigidity, while the standard TPU seal operates reliably from -20 to +70 °C.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X30-10S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 30 mm |
| Stroke adjustment | Up to 10 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. |
| ×30 | Nominal (maximum) stroke length in mm. |
| -10 | 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 10 mm adjustment screw lets technicians quickly set the precise end-stop during initial machine setup, compensating for small stack-up tolerances in the assembly without machining custom spacers.
Fine-tune the clamp stroke for delicate components in electronics or medical device assembly. The 628 N push force at 0.5 MPa provides a firm grip, while the adjustable end prevents over-travel and part damage.
In high-cycle dispensing or pressing operations, the adjustable stroke can be periodically tweaked to compensate for tooling wear or material thickness changes, maintaining consistent process quality without downtime for cylinder swaps.
Choose the SCJ40X30-10S when you need to dial in a precise stroke end during commissioning or for a machine that handles different product formats. If your force requirement is lower, stepping down to a 32 mm bore reduces push force to 402 N at 0.5 MPa; for significantly more power, the 50 mm bore delivers 982 N. For applications where the stroke is permanently fixed, the standard SC series offers the same mounting and force characteristics without the adjustment mechanism. This cylinder is a direct replacement for another AirTAC SCJ40 with a 30 mm nominal stroke and 10 mm adjust range, matching PT ports and basic mounting.
Adjustable-stroke checklist
A screw in the rear cap acts as an internal, adjustable end-stop. Turning the screw changes the retracted position of the piston, shortening the effective stroke by up to 10 mm from the nominal 30 mm maximum. It adjusts the stroke end only and does not alter the cylinder's force, speed, or the extended end position.
At the standard operating pressure of 0.5 MPa, the SCJ40X30-10S generates 628 N of push force. The pull force on the retract stroke is 528 N, which is lower due to the area of the 16 mm piston rod. At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 128 kgf.
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