The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X95-20S 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, 95mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X95-20S is an 80 mm bore double-acting single-rod cylinder that lets you fine-tune the stroke end by up to 20 mm without swapping the unit. With a 25 mm rod and PT3/8 ports, it delivers 2513 N push and 2268 N pull at 0.5 MPa, making it a strong mid-range actuator for commissioning and format changes.
This model includes a built-in magnet (-S suffix), so CMSG, DMSG, or EMSG sensors clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The body length A(SCJ) is 239 mm, and the adjustable cushion decelerates the piston smoothly across the 30-800 mm/s speed range.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X95-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 95 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. |
| ×95 | 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.
The 20 mm rear adjusting screw lets operators dial in the exact stroke end position during machine commissioning or after replacing wear components, without removing the cylinder.
On packaging or sorting lines, quickly adjust the push-out stroke for different box or product sizes. The built-in magnet provides sensor feedback to confirm each format position.
Use the 2513 N push force for consistent clamping. The adjustable stroke prevents over-travel on delicate assemblies, while the air cushion protects the end cap at speed.
Choose the SCJ80 when you need roughly 2.5 kN of push at standard shop air. If your load is lighter, stepping down to the 63 mm bore saves space and drops push force to 1559 N at 0.5 MPa; for heavier work, the 100 mm bore provides 3927 N. The 20 mm adjust range is ideal for taking up tooling wear or dialling in a precise end stop during trial runs.
For a direct replacement, match an SCJ cylinder with 80 mm bore, 95 mm nominal stroke, -20 adjust range, PT ports, and the -S magnet option. If your application does not need field-adjustable stroke, a fixed-stroke SC80X95-S will be more cost-effective. At 95 mm stroke, rod bending is not a primary concern, but always align the load axially.
Adjustable-stroke checklist
A screw in the rear cap limits how far the piston retracts, shortening the stroke end by up to 20 mm from the nominal 95 mm. It sets a mechanical stop for the return stroke only and does not alter the cylinder's bore, force, or extend speed.
No. Like any standard double-acting cylinder, the SCJ80X95-20S will drift or drop if pressure is exhausted or the valve centres. The air cushion only decelerates the piston near stroke end. For load holding without live air, add a pilot-operated check valve or an external rod lock.
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