The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X700-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø40mm bore, 700mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X700-40S is a 40 mm bore double-acting single-rod pneumatic cylinder with a rear-cap adjusting screw, giving you up to 40 mm of field-adjustable stroke-end reduction. At 0.5 MPa it delivers 628 N push and 528 N pull, moving loads with a 16 mm diameter piston rod through a 700 mm nominal stroke. The built-in magnet lets you clamp CMSG, DMSG or EMSG sensors directly onto the tie-rod barrel for reliable end-of-stroke or mid-position sensing without extra brackets.
Its 185 mm body length (A dimension) and PT1/4 ports keep the footprint compact for the force class. The adjustable screw is ideal for commissioning trials where the exact retract stop must be dialled in after installation, or for format changeovers that need a slightly shorter stroke without swapping the cylinder. The 21 mm air cushion at each end decelerates the piston quietly, protecting end caps during high-cycle operation.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X700-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 700 mm |
| Stroke adjustment | Up to 40 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. |
| ×700 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Dial in the exact retract stop after installation without cutting rods or adding external hard stops. The 40 mm screw adjustment lets technicians fine-tune the stroke end during machine bring-up.
Packaging and assembly lines that switch between product sizes use the adjustable stroke to reposition a stop gate or pusher quickly. The 700 mm reach covers a wide range of conveyor widths.
In clamping or pressing fixtures where tooling wears over time, the screw compensates for material loss by advancing the stroke end, maintaining consistent clamp force without reprogramming.
Choose the SCJ40 when you need to fine-tune the stroke end on the machine. If the 628 N push at 0.5 MPa is borderline, stepping up to the 50 mm bore SCJ50 delivers 982 N push, while stepping down to the 32 mm bore SCJ32 gives 402 N push for lighter, faster moves. For a fixed-stroke application where the stroke never changes, the standard SC40 is a simpler, lower-cost alternative. This SCJ40X700-40S replaces another AirTAC SCJ adjustable-stroke cylinder of the same 40 mm bore, 700 mm nominal stroke, 40 mm adjust range, PT port thread, basic mounting and built-in magnet. At 700 mm stroke, the rod is extended significantly; ensure the load is guided externally or use a guided cylinder if side loads are present to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa the cylinder produces 628 N pushing force and 528 N pulling force. At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N. The push force is greater than the pull force because the single piston rod reduces the effective area on the return stroke.
Yes, if you need the 40 mm adjustable stroke-end feature. The SCJ40X700-40S matches the mounting footprint and porting of an SC40, but the body is slightly longer to house the adjusting screw. Ensure the 700 mm nominal stroke and PT1/4 ports match your existing setup.
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