The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X100-40S 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, 100mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X100-40S is a double-acting, single-rod pneumatic cylinder that delivers 1559 N of push force at 0.5 MPa, stepping up to 2805 N at the maximum operating pressure of 0.9 MPa. Its defining feature is the rear-cap adjusting screw, which provides a 40 mm range to fine-tune the stroke end position without removing the cylinder from the machine.
This model includes a built-in magnet, allowing for direct mounting of CMSG, DMSG, or EMSG sensors on the tie-rod barrel for precise end-of-stroke detection. With a 20 mm rod diameter, PT1/4 ports, and a 28 mm air cushion, it offers reliable deceleration for loads in automated positioning tasks.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X100-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 100 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. |
| ×100 | 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.
Adjust the end stop on a new assembly line to dial in the exact pressing depth without swapping out the cylinder.
Quickly reset the stroke for a different box size on a packaging machine by turning the rear screw.
Take up mechanical play in a clamping fixture over time to maintain consistent clamping force.
Select this cylinder when your application requires a 100 mm nominal stroke that can be shortened by up to 40 mm during commissioning or format changes. If you need more force, the 80 mm bore provides 2513 N of push at 0.5 MPa. For applications where the stroke is fixed and never needs adjustment, the standard SC63X100 is a simpler alternative. As a direct replacement, match the bore, 100 mm nominal stroke, 40 mm adjust range, PT port thread, and the -S magnet option. For strokes of 300 mm or more, evaluate side-load forces and consider an external guide rail to protect the rod from bending.
Adjustable-stroke checklist
At 0.5 MPa, it generates 1559 N pushing and 1402 N pulling. The maximum push force at 0.9 MPa is 2805 N.
Yes, if you need field adjustability. Ensure the bore (63 mm), nominal stroke (100 mm), and port size (PT1/4) match. The SCJ adds a rear screw, making the body slightly longer than a standard SC.
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