The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X275-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 275mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X275-40 is a double-acting, single-rod pneumatic cylinder with a 63 mm bore and a nominal stroke of 275 mm. Its defining feature is the rear-cap adjusting screw, which provides a 40 mm field-adjustable range to precisely set the stroke end position without removing the cylinder. This model delivers 1559 N of push force at 0.5 MPa and up to 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust actuator for mid-range industrial tasks.
The SCJ63 body length (A dimension) is 197 mm, and it uses a 20 mm diameter piston rod with an M16x1.5 thread. The cylinder features an adjustable air cushion of 28 mm for smooth deceleration and PT1/4 ports. As a genuine AirTAC component, it is built for reliable performance in filtered-air systems up to 1.0 MPa.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X275-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 275 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/4 |
| Rod thread | M16×1.5 |
| 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 | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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. |
|---|---|
| 63 | Bore size in mm. |
| ×275 | Nominal (maximum) stroke length in mm. |
| -40 | 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 40 mm adjustment screw allows engineers to dial in the exact stroke end position on a new machine without fabricating custom stops, speeding up system setup and debugging.
In packaging or sorting lines, quickly adjust the stroke end to accommodate different product sizes or box heights, reducing changeover time between production runs.
Over time, tooling or contact surfaces can wear. The adjustable stroke provides a simple way to take up this slack and maintain precise positioning without replacing the entire cylinder.
Select the SCJ63X275-40 when you need a 275 mm stroke with the ability to fine-tune the end position by up to 40 mm during commissioning or for format changes. If your force requirement is lower, consider stepping down to a 50 mm bore, which provides 982 N of push force at 0.5 MPa. For higher force needs, an 80 mm bore delivers 2513 N at the same pressure. If your application requires a fixed, non-adjustable stroke, the standard SC63X275 is a more economical choice. For exact drop-in replacement, match the 63 mm bore, 275 mm nominal stroke, 40 mm adjust range, PT port thread, and basic mounting. With a stroke of 275 mm, be mindful of side loads; if the rod is subjected to lateral forces, use an external guide rail or switch to a guided cylinder to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
A screw in the rear cap limits the piston's retraction stroke. By turning this screw, you can shorten the stroke end by up to 40 mm from the nominal 275 mm. It adjusts the mechanical stop position, not the cylinder's force or speed.
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum push force at the 0.9 MPa operating limit is 2805 N. The pull force is lower because the rod reduces the effective piston area on the return stroke.
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.