The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X90-50 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø80mm bore, 90mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X90-50 is an 80 mm bore double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end. A rear-cap adjusting screw provides up to 50 mm of retraction from the nominal 90 mm stroke, letting you fine-tune the end position during commissioning or format changes without replacing the cylinder. At 0.5 MPa, it delivers 2513 N of push force and 2268 N on the pull stroke, using a 25 mm diameter piston rod.
This tie-rod cylinder uses PT3/8 ports and an M20x1.5 rod thread, with a 28 mm air cushion at each end for smooth deceleration. The SCJ body length A is 239 mm, slightly longer than a fixed-stroke SC of the same bore to house the adjustment mechanism. It operates on filtered air from 0.15 to 1.0 MPa and is rated for -20 to +70 °C with its standard TPU seals.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X90-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 90 mm |
| Stroke adjustment | Up to 50 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. |
| ×90 | Nominal (maximum) stroke length in mm. |
| -50 | 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 50 mm adjustment screw lets technicians fine-tune the actuator end-stop on a new assembly line without swapping shims or hard stops, speeding up initial machine bring-up.
On packaging or sorting conveyors, quickly adjust the pusher stroke for different box sizes. The SCJ80's 2513 N push force handles medium-weight product diversion reliably.
In clamping or pressing fixtures, the adjustable stroke can be extended slightly over time to compensate for pad or tooling wear, maintaining consistent clamp force without mechanical rework.
Choose the SCJ80X90-50 when you need to dial in a precise stroke end position on the machine, with a 50 mm adjustment window. If your force requirement is lower, stepping down to a 63 mm bore reduces push force to 1559 N at 0.5 MPa. For higher force, the 100 mm bore provides 3927 N. If the stroke never needs field adjustment, the fixed-stroke SC80 series is a simpler, lower-cost alternative. For a direct replacement, match an AirTAC SCJ cylinder with an 80 mm bore, 90 mm nominal stroke, 50 mm adjustment range, PT3/8 ports, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa air pressure, this 80 mm bore cylinder generates 2513 N of push force and 2268 N of pull force. Push force is higher because the single rod reduces the effective piston area on the return stroke. Maximum operating force at 0.9 MPa is 4523 N push.
A screw in the rear cap sets the retracted stroke end position. Turning the screw moves the internal stop, shortening the effective stroke by up to 50 mm on this model. It adjusts only the stroke end, not the cylinder's force or speed. The nominal 90 mm stroke is the maximum achievable.
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