The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X40-40TC 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, 40mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X40-40TC is a double-acting, single-rod pneumatic cylinder that puts a 40 mm field-adjustable stroke range at your fingertips via a rear-cap screw. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa, making it a solid mid-range workhorse for applications where the end position needs frequent fine-tuning.
This model ships with a centre trunnion (TC) mount and the TCM1 bracket, allowing the cylinder to pivot as it strokes—ideal for swinging or articulating loads. The 20 mm piston rod, PT1/4 ports, and 28 mm air cushion work together to provide reliable, decelerated end-of-stroke performance without the bulk of a fixed external stop.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X40-40TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 40 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. |
| ×40 | 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.
Quickly adjust the retract or extend end position for different product sizes on a packaging line without swapping cylinders or mechanical hard stops.
Fine-tune the clamping stroke on a welding or assembly fixture to accommodate varying workpiece thicknesses, using the rear screw for precise, repeatable depth control.
During machine commissioning, dial in the exact stroke end to synchronize with other actuators. Later, adjust the screw to compensate for gripper pad wear, maintaining consistent contact.
Step up to an 80 mm bore (2513 N push at 0.5 MPa) if the 63 mm frame leaves too little force margin, or down to a 50 mm bore (982 N) for a lighter, faster actuator. The SCJ is the right choice when you need to dial in a stroke end position during commissioning or changeover; if your stroke is fixed and never varies, a standard SC cylinder saves cost and complexity. For a direct replacement, match an SCJ of the same 63 mm bore, 40 mm nominal stroke, 40 mm adjust range, PT port thread, and TC mounting (F-SC63TC). At this short 40 mm stroke, rod bending from side loads is rarely a concern, but always align the rod with the load path to prevent seal wear.
Adjustable-stroke checklist
At the standard 0.5 MPa operating pressure, the cylinder pushes with 1559 N and pulls with 1402 N (the pull force is lower due to the 20 mm rod area). At the maximum 0.9 MPa, push force reaches 2805 N.
Yes, if you need the 40 mm stroke-end adjustability. The SCJ shares the same mounting footprint for the 63 mm bore, but ensure your application can accommodate the slightly longer body length (A=197 mm) and that you order the matching TC centre trunnion (F-SC63TC) if you are replacing a pivoting SC.
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