The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-30 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X450-30 is a double-acting, single-rod AirTAC cylinder with a 30 mm rear adjusting screw, letting you fine-tune the stroke end on the fly without swapping the unit. With a 63 mm bore, it delivers 1559 N of push force at 0.5 MPa and 2805 N at 0.9 MPa, making it a solid mid-range workhorse for applications needing a 450 mm reach.
The 20 mm rod and PT1/4 ports keep the design robust, while the 28 mm air cushion decelerates the piston smoothly. This basic-mount model comes with a TPU seal for standard -20 to +70 °C operation and PT threads. The SCJ body length is 197 mm, slightly longer than a fixed-stroke SC of the same bore to house the adjustment mechanism.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-30 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 450 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. |
| ×450 | 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, the 30 mm adjuster allows engineers to precisely dial in the 450 mm stroke end position to match tooling or fixtures without iterative cylinder swaps.
On a packaging line handling different box sizes, the adjustable stroke lets operators quickly reset the pusher's end point for a new format, minimizing downtime.
In a long-running clamping or pressing station, the screw can be advanced to take up mechanical wear in linkages or tooling, maintaining consistent clamping force and position.
Choose the SCJ63X450-30 when you need to dial in a precise end position during commissioning or after a format change, without the cost and complexity of external hard stops. If your force requirement is lower, the 50 mm bore SCJ50 series provides 982 N push at 0.5 MPa in a lighter package; for more force, step up to the 80 mm bore which delivers 2513 N at the same pressure.
For a 450 mm stroke, be mindful of side loading on the extended rod. If your application imposes a significant radial load, consider adding an external linear guide or switching to a guided cylinder. As a direct replacement, match this model's 63 mm bore, 450 mm nominal stroke, 30 mm adjust range, PT ports, and basic mounting. If you need a fixed stroke, the standard SC63X450 is the correct alternative.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 1559 N and the pull force is 1402 N. The maximum push force at the 1.0 MPa operating limit is 2805 N. The pull force is lower because the 20 mm rod reduces the effective piston area on the return stroke.
The rear-cap screw sets the stroke end position within a 30 mm range, shortening the 450 mm nominal stroke. It is a mechanical stop for the piston, not a locking device. The cylinder will not hold its position if air pressure is lost; an external rod lock or pilot-operated check valve is required for load holding.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.