The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30TC 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, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-30TC is a double-acting, single-rod pneumatic cylinder with a rear-cap adjusting screw that lets you fine-tune the stroke end position within a 30 mm range without removing the cylinder from the machine. At 0.5 MPa it delivers 1559 N of push force and 1402 N of pull force, making it a strong mid-bore workhorse for tasks that need a precise, repeatable end stop.
This model ships with a centre trunnion (TC) mount and the TCM1 bracket, allowing the cylinder to pivot as it strokes—ideal for swinging or articulating linkages. The 63 mm bore uses a 20 mm diameter piston rod, PT1/4 ports, and an M16x1.5 rod thread, with a 28 mm air cushion at each end for smooth deceleration.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-30TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 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. |
| ×50 | 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.
During machine setup, dial the rear screw to fine-tune the cylinder's extended position by up to 30 mm. This eliminates the need to shim or reposition hard stops, cutting commissioning time on assembly fixtures.
On packaging or sorting lines that handle multiple product sizes, the adjustable stroke lets operators quickly reset the pusher or diverter stroke end for a new format without swapping the cylinder.
In clamping or pressing operations where tooling or seals wear over time, the 30 mm adjustment range allows the stroke end to be extended slightly to maintain consistent contact force and part quality.
Choose the SCJ63 when you need roughly 1560 N of push force at standard shop air. If your load is lighter, stepping down to the 50 mm bore (982 N push at 0.5 MPa) saves space and air consumption; for heavier work, the 80 mm bore provides 2513 N push. The adjustable stroke is the key differentiator—if your application runs a fixed, never-changing stroke, the simpler SC63 fixed-stroke cylinder is a more economical choice.
For direct replacement, match an AirTAC SCJ adjustable-stroke cylinder with 63 mm bore, 50 mm nominal stroke, 30 mm adjust range, PT ports, and TC centre trunnion mounting. This model does not include a magnet; if you need piston position sensing, order the -S variant and add CMSG/DMSG sensors.
Adjustable-stroke checklist
At 0.5 MPa the push force is 1559 N and the pull force is 1402 N (the difference is due to the single 20 mm rod). At the maximum operating pressure of 1.0 MPa, the theoretical push force reaches 3118 N. Always size for your working pressure.
Yes, provided the mounting style, port thread, and bore match. The SCJ body is slightly longer to house the adjusting screw, so check the 197 mm base body length against your available space. The TC centre trunnion mount also requires the TCM1 bracket, which is included.
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