The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X25-20TC 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, 25mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X25-20TC is an 80 mm bore, double-acting, single-rod pneumatic cylinder engineered for applications where the stroke end position must be fine-tuned during setup or changeover. Its rear-cap adjusting screw provides up to 20 mm of stroke-length reduction from the 25 mm nominal maximum, allowing machine builders to dial in the exact stopping point without swapping the cylinder or adding external hard stops.
This model is configured with a TC centre trunnion mount (supplied with the TCM1 bracket for F-SC80TC), making it ideal for pivoting applications. The 25 mm diameter piston rod delivers a push force of 2513 N at 0.5 MPa, while the PT3/8 port and integrated air cushion ensure smooth deceleration across its 30-800 mm/s speed range.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X25-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 25 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. |
| ×25 | 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 end-of-stroke position during initial machine commissioning without mechanical rework. The 20 mm adjustment range allows precise alignment of tooling or stops.
Quickly adapt stroke length for different product sizes on packaging or sorting lines. Operators can adjust the rear screw to accommodate new box heights or pallet dimensions.
Take up mechanical play or tooling wear over time by slightly extending the effective stroke. The adjustable screw maintains consistent part contact without replacing the cylinder.
Select the SCJ80X25-20TC when you need a compact, pivoting actuator with field-adjustable stroke end. The 80 mm bore provides 2513 N of push force at 0.5 MPa, a significant step up from the 1559 N offered by a 63 mm bore. If your application requires a fixed, non-adjustable stroke, a standard SC80X25 cylinder is a simpler alternative. For guided loads, consider pairing this cylinder with an external guide rail.
As a direct replacement, match the 80 mm bore, 25 mm nominal stroke, 20 mm adjust range, PT3/8 port thread, and TC centre trunnion mounting. The F-SC80TC trunnion kit is included. Note that this model does not have a built-in magnet; if you need sensor feedback, specify the -S suffix.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 2513 N and the pull force is 2268 N. The push force is higher because it acts on the full 80 mm bore area, while the pull force is reduced by the 25 mm rod cross-section.
No. Like all standard pneumatic cylinders, the SCJ80X25-20TC will drift or drop if air pressure is lost or the valve is centered. The adjustable screw only sets the stroke end position and does not act as a mechanical lock. You must add an external rod brake or pilot-operated check valve for load holding.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.