The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X175-30 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, 175mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X175-30 is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. Its rear-cap adjusting screw lets you shorten the stroke end by up to 30 mm without removing the cylinder, so commissioning and format changeovers happen in minutes instead of hours. At 0.5 MPa this 63 mm bore delivers 1559 N of push force and 1402 N on the pull stroke, driven by a 20 mm piston rod through PT1/4 ports.
The tie-rod body measures 197 mm long and includes a 28 mm air cushion to decelerate the piston quietly. The adjustable screw only sets the stroke end position—it does not alter the cylinder's force rating or speed. For position sensing, add the -S magnet option to mount CMSG/DMSG sensors directly on the barrel.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X175-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 175 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. |
| ×175 | 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 during machine bring-up without swapping cylinders or machining spacer blocks. The 30 mm screw range lets technicians dial in the exact stroke on the fly.
Packaging and assembly lines that switch between product sizes use the SCJ63X175-30 to adjust push or eject strokes quickly. Operators reset the stop in seconds, keeping changeover time short.
In clamping or pressing fixtures, tooling wear gradually shifts the stroke end. The rear screw provides a simple way to take up the slack and restore full engagement without replacing the cylinder.
Step up to an 80 mm bore when the 1559 N push at 0.5 MPa is marginal—the SCJ80 delivers 2513 N from the same pressure. If your stroke never needs field adjustment, a fixed-stroke SC63 cylinder is a simpler, lower-cost alternative. For a direct replacement, match the 63 mm bore, 175 mm nominal stroke, 30 mm adjust range, PT port thread, and basic mounting; the SCJ mounting subset includes FA front flange, LB foot, and TC centre trunnion, but no FB flange or CA/CB clevis. At 175 mm stroke, rod bending under side load is unlikely, but if the load is off-axis, add an external guide rail or switch to a guided cylinder to protect the rod bearing.
Adjustable-stroke checklist
At 0.5 MPa air pressure the cylinder produces 1559 N pushing and 1402 N pulling. At the maximum operating pressure of 1.0 MPa, push force reaches 3118 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
Yes, provided the mounting style and port thread match. The SCJ63X175-30 has the same bore, rod diameter, and port size as an SC63, but the body is slightly longer to house the adjusting screw. Check that the extra length fits your machine envelope before ordering.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.