The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X200-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø80mm bore, 200mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X200-20S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you a 20 mm fine-tuning range on the 200 mm nominal stroke. Its 80 mm bore delivers 2513 N of push force at 0.5 MPa (4523 N at 0.9 MPa), driven by a 25 mm diameter piston rod through PT3/8 ports.
The built-in magnet (S suffix) lets you clamp CMSG/DMSG/EMSG reed or solid-state sensors directly onto the tie-rod barrel for precise, non-contact end-of-stroke sensing. The adjustable rear screw is purely a mechanical stroke-end stop—it does not alter the cylinder's force output or speed, making it ideal for commissioning adjustments or format changeovers without swapping the cylinder.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X200-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 200 mm |
| Stroke adjustment | Up to 20 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT3/8 |
| Rod thread | M20×1.5 |
| 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, 28 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 | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 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. |
|---|---|
| 80 | Bore size in mm. |
| ×200 | Nominal (maximum) stroke length in mm. |
| -20 | 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 cylinder's end position during machine setup without re-plumbing or replacing the actuator, saving hours of mechanical adjustment on packaging lines.
Quickly adapt the stroke length for different product sizes on conveyors or diverters by adjusting the rear screw, eliminating the need for multiple fixed-stroke cylinders.
The built-in magnet allows direct mounting of CMSG/DMSG sensors to confirm the adjusted stroke end, providing closed-loop feedback for automated format changes.
Choose the SCJ80X200-20S when you need to dial in the exact stopping position of a 200 mm stroke on the machine floor. If your load requires more force, stepping up to the 100 mm bore provides 3927 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC80X200 is a simpler, cost-effective alternative. When replacing this unit, match the 80 mm bore, 200 mm nominal stroke, 20 mm adjust range, PT port thread, and the integrated magnet. For strokes of 300 mm or longer, evaluate side-loading on the 25 mm rod and consider adding an external linear guide to prevent rod bending.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, the cylinder provides 2513 N of push force and 2268 N of pull force. The maximum push force at 0.9 MPa is 4523 N. The pull force is lower due to the 25 mm piston rod reducing the effective piston area on the retract stroke.
A mechanical screw in the rear end-cap acts as an internal stop for the piston, allowing you to shorten the stroke end by up to 20 mm from the nominal 200 mm maximum. It is a physical limit stop, not a pressure or speed regulator, and it does not lock the piston in place when air pressure is removed.
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