The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X70-30S 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. Ø63mm bore, 70mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X70-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing a 30 mm fine-tuning range on the nominal 70 mm stroke. Its 63 mm bore delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks that need precise end-position setting without swapping the cylinder.
A built-in magnet (suffix -S) allows direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection. The cylinder uses a 20 mm diameter piston rod, PT1/4 ports, and an M16x1.5 rod thread, with a 28 mm air cushion to decelerate the load smoothly.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X70-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 70 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. |
| ×70 | 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.
Fine-tune the end-stop position on a new assembly line without removing the cylinder. The 30 mm adjustment screw lets technicians quickly dial in the exact stroke for a pick-and-place mechanism.
Adjust the stroke end for different product sizes on a packaging line. The SCJ63X70-30S allows operators to shift a stop gate's position by up to 30 mm in seconds to handle a new box format.
Take up mechanical play in a clamping fixture over time. As tooling wears, the rear adjusting screw can extend the effective stroke by up to 30 mm to maintain consistent clamping force without replacing components.
Choose the SCJ63X70-30S when you need to dial in the stroke end during commissioning or format changes. If 1559 N of push force at 0.5 MPa is insufficient, stepping up to the 80 mm bore provides 2513 N; if it is more than you need, the 50 mm bore delivers 982 N. For applications where the stroke never needs field adjustment, a fixed-stroke SC63X70 is a simpler, cost-effective alternative.
A direct replacement must match the 63 mm bore, 70 mm nominal stroke, 30 mm adjustable range, PT port thread, and the built-in magnet. This model uses a basic mount; if a pivoting motion is required, the TC centre trunnion with the TCM1 bracket is the correct SCJ mounting accessory.
Adjustable-stroke checklist
At 0.5 MPa, the cylinder provides 1559 N of push force and 1402 N of pull force. The maximum push force at the 0.9 MPa operating limit is 2805 N. Because it is a single-rod cylinder, the pull force is lower due to the area of the 20 mm rod.
You can replace it if you need the adjustable stroke feature. The SCJ63X70-30S has the same bore, rod, and port specifications as a fixed-stroke SC63, but its body is slightly longer to house the adjusting screw. Ensure the 30 mm adjustment range suits your application and that you match the port thread, mounting style, and magnet option.
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