The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-20TC is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø63mm bore, 50mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X50-20TC is a double-acting, single-rod pneumatic cylinder that puts fine stroke adjustment directly at the rear cap. With a 20 mm adjustment range, you can dial in the exact stroke end position during commissioning or changeovers without swapping the cylinder or adding external hard stops. The 63 mm bore delivers 1559 N of push force at 0.5 MPa, making it a solid mid-range actuator for tasks that need both power and precision.
This model ships with a centre trunnion (TC) mount and the matching TCM1 bracket, so it can pivot freely as the load swings through an arc. The 20 mm piston rod and M16x1.5 rod thread handle side loads better than smaller bores, while the 28 mm air cushion at each end decelerates the piston quietly. Body length A(SCJ) is 197 mm, and the PT1/4 ports keep plumbing simple.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X50-20TC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 50 mm |
| Stroke adjustment | Up to 20 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. |
| -20 | 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.
Quickly re-set the stroke end to match a new product size or tooling setup on a packaging or assembly line without mechanical rework.
The TC centre trunnion mount lets the cylinder swing, while the 20 mm adjustment dials in the exact gate open/close position on a conveyor sortation system.
Fine-tune the final clamp depth or workpiece stop position during trial runs, then lock the screw to hold the setting for production batches.
Choose the SCJ63 when you need more force than a 50 mm bore (982 N push at 0.5 MPa) but don't yet require the bulk of an 80 mm bore (2513 N). The 20 mm adjustable stroke is ideal for fine-tuning end positions on fixtures, clamps, or stops. If your application needs a fixed, repeatable stroke with no field adjustment, the standard SC63 is a simpler, more cost-effective alternative. For replacement, match the bore (63 mm), nominal stroke (50 mm), adjustment range (-20), PT port thread, and the TC centre trunnion mounting (F-SC63TC).
Adjustable-stroke checklist
Push force is 1559 N at 0.5 MPa and 2805 N at the maximum operating pressure of 0.9 MPa. Pull force is lower (1402 N at 0.5 MPa) because the 20 mm piston rod reduces the effective piston area on the retract side.
Yes, if you need field-adjustable stroke. The SCJ63 body is slightly longer to house the adjusting screw. Ensure the nominal stroke (50 mm), port thread (PT1/4), and mounting style (TC centre trunnion) match your current setup. The SCJ cannot accept FB flange or CA/CB clevis mounts.
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