The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X40-30 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. Ø63mm bore, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X40-30 delivers a nominal 40 mm stroke with a 30 mm field-adjustable range via the rear-cap screw, letting you fine-tune the end position without swapping the cylinder. At 0.5 MPa, it generates 1559 N of push force and 1402 N on the pull stroke, driven by a 20 mm piston rod.
This 63 mm bore tie-rod cylinder uses a PT1/4 port and M16x1.5 rod thread, with a 28 mm air cushion to decelerate the piston near stroke end. The body length A measures 197 mm, and the screw shortens the stroke end by up to 30 mm for precise commissioning or format changes.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X40-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 30 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. |
| ×40 | 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.
During machine setup, the 30 mm screw adjustment lets you dial in the exact stroke end without cutting brackets or adding shims, saving hours of mechanical rework.
On a packaging line switching between box sizes, the adjustable stroke lets operators quickly reset the pusher end position to match the new product length.
In clamping or pressing fixtures, the screw can be turned to take up pad wear over time, maintaining consistent contact force without reprogramming the PLC.
Choose the SCJ63X40-30 when you need to dial in the stroke end on the machine without external hard stops. If 1559 N push is marginal, stepping up to the 80 mm bore provides 2513 N at the same pressure. For a fixed-stroke solution where the adjustment screw is not required, the standard SC63X40 is the direct alternative. A genuine replacement must match the 63 mm bore, 40 mm nominal stroke, 30 mm adjust range, PT1/4 ports, and basic mounting.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and pull force is 1402 N. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The force is identical to the fixed-stroke SC63 cylinder.
A screw in the rear cap limits how far the piston can extend, shortening the stroke end by up to 30 mm from the nominal 40 mm. It sets the mechanical stop position and does not change the cylinder's force or speed.
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