The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-100 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, 80mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X80-100 is a double-acting, single-rod pneumatic cylinder that puts fine stroke control at your fingertips. Its defining feature is a rear-cap adjusting screw that allows you to shorten the stroke end by up to 100 mm, making it ideal for commissioning trials or format changeovers where the final stop position must be dialed in on the machine. With a 63 mm bore, it delivers a substantial 1559 N of push force at 0.5 MPa, operating on filtered air up to 1.0 MPa.
This model has an 80 mm nominal maximum stroke and uses a 20 mm diameter piston rod with an M16x1.5 male thread. The body length (A dimension) is 197 mm, and it includes a 28 mm long air cushion to decelerate the piston smoothly at the end of travel. The standard PT1/4 ports and TPU seals suit general industrial environments from -20 to +70 °C.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X80-100 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 80 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. |
| ×80 | 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.
During machine commissioning, the 100 mm adjustment screw allows engineers to precisely set the actuator's end stop by hand, eliminating the need to fabricate shims or reposition external hard stops.
In packaging or assembly lines running multiple product sizes, operators can quickly adjust the cylinder stroke to match a new format, reducing changeover time without swapping the cylinder.
For clamping or pressing operations, the adjustable stroke end can be periodically advanced to compensate for wear on tooling or contact surfaces, maintaining consistent clamping force and part quality.
Choose the SCJ63X80-100 when you need a robust mid-bore cylinder with a wide 100 mm field-adjustable stroke range. If your force requirement is lower, stepping down to a 50 mm bore reduces push force to 982 N at 0.5 MPa; for higher force, the 80 mm bore provides 2513 N. This adjustable-stroke unit is the right pick when the exact end position is unknown at the design stage or may need to change between product runs. If your application requires a fixed, repeatable stroke with no field adjustment, the standard SC63 series is a more economical choice.
For direct replacement, match the 63 mm bore, 80 mm nominal stroke, and the full 100 mm adjustment range (-100), along with PT port threads. This basic configuration accepts the SCJ mounting subset: FA front flange, LB foot, or TC centre trunnion with TCM1 bracket. For strokes of 300 mm or more, evaluate side loads carefully; an external guide rod or a guided cylinder assembly is recommended to prevent rod bending and premature seal wear.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The pull force is lower because the piston rod reduces the effective area on the return stroke. At the maximum operating pressure of 0.9 MPa, the push force reaches 2805 N.
Yes, if you need field-adjustable stroke. The SCJ63X80-100 shares the same bore, port size (PT1/4), and mounting accessories (FA, LB, TC) as the SC63. Ensure the 100 mm adjustment range and the slightly longer body length (197 mm) fit your machine envelope.
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