The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X63-30SLB 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. Ø50mm bore, 63mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X63-30S is a 50 mm bore, double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that provides up to 30 mm of field-adjustable stroke-end reduction. It delivers 982 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks that need fine positional tuning without swapping the cylinder.
This model includes a built-in magnet for CMSG/DMSG/EMSG sensors and is fitted with LB (foot) mounting brackets for stable surface installation. The 20 mm rod and PT1/4 ports are standard for the 50 mm bore, and the adjustable air cushion helps decelerate the piston smoothly at the end of travel.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X63-30SLB |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 63 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×63 | 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 position of a stop gate on a conveyor during initial machine commissioning, dialing in the exact 63 mm travel needed without fabricating hard stops.
Quickly adjust a pusher arm's stroke on a packaging machine when switching between product sizes, using the 30 mm adjustment range to accommodate different box widths.
Take up mechanical play in a clamping fixture over time by slightly extending the effective stroke with the rear screw, maintaining consistent clamping force without replacing parts.
Step up to the 63 mm bore for 1559 N of push force at 0.5 MPa if the 50 mm bore's 982 N is marginal, or step down to the 40 mm bore (628 N) for a lighter, more compact solution. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC series is a more economical choice. This SCJ50X63-30SLB is a direct replacement for another AirTAC SCJ50X63-30S with LB mount and PT ports; ensure the 30 mm adjust range matches your machine's setup.
Adjustable-stroke checklist
At the standard operating pressure of 0.5 MPa, it generates 982 N of pushing force and 825 N of pulling force due to the 20 mm rod reducing the piston area on the retract side. The maximum push force at 0.9 MPa is 1767 N.
Physically, yes, but the SCJ body is longer to house the adjusting mechanism. It is a direct functional replacement only if you need the 30 mm stroke-end adjustment feature. The mounting footprint and port size (PT1/4) are identical to an SC50.
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