The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X150-75STC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø63mm bore, 150mm nominal stroke, PT1/4 ports and adjustable end cushioning.
This SCJ63X150-75STC is a double-acting, single-rod pneumatic cylinder with a 75 mm field-adjustable stroke end, letting you fine-tune the 150 mm nominal stroke without swapping the unit. The 63 mm bore delivers 1559 N of push force at 0.5 MPa and up to 2805 N at 0.9 MPa, while the 20 mm piston rod provides robust, guided linear motion.
The built-in magnet (S suffix) enables direct mounting of CMSG/DMSG/EMSG sensors for end-of-stroke detection, and the TC centre trunnion mount (supplied with TCM1 bracket) allows the cylinder to pivot, making it ideal for swinging or articulating loads. A 28 mm air cushion decelerates the piston quietly at each end of travel.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X150-75STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 150 mm |
| Stroke adjustment | Up to 75 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. |
| ×150 | Nominal (maximum) stroke length in mm. |
| -75 | 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 stroke end by up to 75 mm to handle different box or carton sizes on the same packaging line without mechanical stops.
Fine-tune the actuator's end position during machine commissioning to perfectly align with mating parts, eliminating hard-stop shimming.
Periodically adjust the stroke to take up mechanical wear in grippers or clamps, maintaining consistent clamping force over the tooling's life.
Choose this 63 mm bore when a 50 mm unit (982 N push) is slightly underpowered but an 80 mm (2513 N push) would be oversized for your fixture. The 75 mm adjustment range is particularly useful for commissioning trials or multi-format machines where the stroke end needs frequent, precise changes. If your application does not require stroke adjustment, the fixed-stroke SC63 offers a simpler, more compact alternative.
For replacement, match the bore (63 mm), nominal stroke (150 mm), adjust range (-75), PT port thread, TC centre trunnion mounting (F-SC63TC), and the -S magnet. Since the stroke is under 300 mm, rod bending from side loads is less of a concern, but always ensure the load is guided to prevent seal wear.
Adjustable-stroke checklist
At 0.5 MPa, this 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. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, if you need field-adjustable stroke. The SCJ63X150-75STC has the same 63 mm bore, PT1/4 port, and 20 mm rod as an SC63, but its body is slightly longer to house the rear adjusting screw. Ensure the 75 mm adjustment range and TC trunnion mount fit your machine layout.
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