The AirTAC Airtac SCJ63 Standard Cylinder SCJ63X550-100H is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 100 mm range without swapping the cylinder. Ø63mm bore, 550mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X550-100H is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, allowing operators to fine-tune the piston's stop position by up to 100 mm without dismounting the unit. With a 63 mm bore and a 20 mm piston rod, it delivers 1559 N of push force at 0.5 MPa and up to 2805 N at the maximum operating pressure of 0.9 MPa, making it a robust choice for mid-range automation tasks that require on-the-fly mechanical adjustment.
This model features a Viton (FKM) seal, extending its operating temperature range to 0–150 °C for reliable performance in high-heat or aggressive environments. It uses a PT1/4 port, an M16x1.5 rod thread, and has a 28 mm air cushion for smooth deceleration. The body length A is 197 mm, and the cylinder is a genuine AirTAC tie-rod design, built for consistent, repeatable cycle life.
| Model | Airtac SCJ63 Standard Cylinder SCJ63X550-100H |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 550 mm |
| Stroke adjustment | Up to 100 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. |
| ×550 | Nominal (maximum) stroke length in mm. |
| -100 | 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 push stroke end by up to 100 mm to accommodate different box sizes or product heights on a single packaging machine, eliminating mechanical change parts and reducing downtime between batches.
The Viton seals withstand 0–150 °C operating temperatures, making this cylinder suitable for hot press platens or molding stations where the final clamping position must be dialed in precisely as tooling wears.
During new machine commissioning, the 100 mm adjustment range allows engineers to empirically find the optimal actuator stroke for a mechanism without ordering multiple fixed-stroke cylinders, accelerating the debug phase.
Select the SCJ63X550-100H when you need to commission a 550 mm stroke with the ability to shorten the end position by up to 100 mm for process tuning or format changes. If 1559 N of push force at 0.5 MPa is insufficient, stepping up to an 80 mm bore provides 2513 N; if it's excessive, a 50 mm bore delivers 982 N. This cylinder is ideal when the stroke length needs frequent, tool-free adjustment, but if your application requires a fixed, repeatable stroke with no variation, a standard SC fixed-stroke cylinder is a simpler and more cost-effective alternative.
For a direct replacement, match the 63 mm bore, 550 mm nominal stroke, 100 mm adjustment range, PT port thread, and Viton seal. This model uses a basic mount; if a pivoting motion is needed, the TC centre trunnion (F-SC63TC) is the correct SCJ-compatible accessory. For this 550 mm stroke, be mindful of side-loading on the 20 mm rod—an external guide rail or a guided cylinder is recommended to prevent rod bending and ensure long seal life.
Adjustable-stroke checklist
The output force is determined by the 63 mm bore and air pressure, not the stroke adjustment. At 0.5 MPa, it generates 1559 N of push force and 1402 N of pull force. At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N. The rear adjusting screw only sets the stroke end position; it does not regulate pressure or force.
A direct functional replacement requires another SCJ adjustable-stroke cylinder with a 63 mm bore, 550 mm nominal stroke, and a 100 mm adjustment range. A fixed-stroke SC63X550 will mount and connect identically, but you will lose the ability to fine-tune the stroke end on the machine. If the adjustment feature is not needed, the SC is a suitable alternative; otherwise, the SCJ is required.
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