The AirTAC Airtac SCJ80 Standard Cylinder SCJ80X65-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø80mm bore, 65mm nominal stroke, PT3/8 ports and adjustable end cushioning.
The SCJ80X65-30S is an 80mm bore, double-acting single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 30mm of field-adjustable stroke-end reduction. This model includes a built-in magnet (S) for direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors, enabling precise end-of-stroke or mid-stroke position feedback without external brackets. At 0.5 MPa, it delivers 2513 N of push force and 2268 N of pull force, making it a robust choice for medium-to-heavy automation tasks.
With a 25mm diameter piston rod and a PT3/8 port, the SCJ80X65-30S features an adjustable air cushion (28mm cushion length) for smooth deceleration. The tie-rod construction keeps the body length (A dimension) at 239mm, slightly longer than a fixed-stroke SC of the same bore. This cylinder is ideal for commissioning trials, format changeovers, or applications where the end-stop position needs fine-tuning without swapping the cylinder or adding external hard stops.
| Model | Airtac SCJ80 Standard Cylinder SCJ80X65-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø80 mm |
| Nominal stroke | 65 mm |
| Stroke adjustment | Up to 30 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. |
| ×65 | Nominal (maximum) stroke length in mm. |
| -30 | 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 30mm rear adjustment screw allows engineers to fine-tune the stroke end-stop on the fly during initial machine setup, eliminating the need to swap cylinders or machine custom stops.
Ideal for packaging or assembly lines that switch between product sizes. Operators can quickly adjust the cylinder stroke to match new box heights or part positions without mechanical rework.
The built-in magnet (S) works with CMSG/DMSG sensors to provide reliable, non-contact position sensing, confirming the adjusted stroke end is reached in automated sequences.
Choose the SCJ80 when your load requires the force class of an 80mm bore—2513 N push at 0.5 MPa. If your force needs are lower, stepping down to the 63mm bore (1559 N push) reduces air consumption and physical size; for higher force demands, the 100mm bore offers 3927 N push. The 30mm adjustment range on this model lets you dial in the exact stroke end, which is particularly useful during machine commissioning or when accommodating part tolerance variations. For a fixed, non-adjustable stroke, the standard SC series is a simpler alternative. If your application involves significant side loading, consider an external guide rail or a guided cylinder, especially given the 65mm nominal stroke. This SCJ80X65-30S is a direct replacement for any AirTAC SCJ80 cylinder with the same 65mm nominal stroke, 30mm adjust range, PT3/8 port, and magnet option.
Adjustable-stroke checklist
A rear-cap adjusting screw limits the piston's retract stroke end. You can shorten the effective stroke by up to 30mm from the nominal 65mm maximum. This sets the end position precisely; it does not change the cylinder's force or speed.
At 0.5 MPa, the SCJ80X65-30S generates 2513 N of push force and 2268 N of pull force. The pull force is lower due to the 25mm rod reducing the effective piston area on the return stroke. At the maximum operating pressure of 1.0 MPa, the theoretical push force is 5026 N.
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