The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-100STC 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, 450mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X450-100STC puts a 100 mm field-adjustable stroke range into a 63 mm bore double-acting cylinder, delivering 1559 N of push force at 0.5 MPa. The rear-cap adjusting screw lets you dial in the exact stroke end without removing the cylinder, which is invaluable during commissioning or when a machine runs multiple product formats.
This model is configured with a built-in magnet for CMSG/DMSG/EMSG sensors and a centre trunnion (TC) mount that ships with the TCM1 bracket, allowing the cylinder to pivot as it strokes. The 20 mm rod, PT1/4 ports, and 28 mm air cushion handle mid-range industrial loads, while the 450 mm nominal stroke keeps you well inside the 1500 mm maximum for this bore.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X450-100STC |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 450 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. |
| ×450 | 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.
The 100 mm adjustment range allows operators to quickly change the stroke end when switching between different box or carton sizes, eliminating the need to swap out cylinders or mechanical stops.
Fine-tune the gate opening angle on a conveyor diverter by adjusting the rear screw. The centre trunnion mount lets the cylinder body pivot, accommodating the arc of the gate mechanism.
On a production fixture, the adjustable stroke end can be dialled forward over time to compensate for pad wear or material thickness variations, maintaining consistent clamp force without reprogramming.
Choose the SCJ63 bore when your application needs roughly 1560 N of push force at standard plant air; stepping down to a 50 mm bore drops available push to 982 N, while moving up to an 80 mm bore nearly doubles it to 2513 N. The 100 mm adjustment range on this model is the widest standard option, ideal for machines that undergo frequent format changes or where the end-stop position is not yet finalised.
If your stroke never needs field adjustment, a fixed-stroke SC63X450 may be a simpler alternative. For a direct replacement, match a 63 mm bore SCJ with a 450 mm nominal stroke, 100 mm adjust range, PT ports, centre trunnion mounting (F-SC63TC), and a built-in magnet. At 450 mm of extension, evaluate side-loading on the 20 mm rod; if the load is not guided externally, consider adding a guide block or switching to a guided cylinder.
Adjustable-stroke checklist
At 0.5 MPa, this 63 mm bore cylinder produces 1559 N of push force and 1402 N of pull force (the difference is due to the 20 mm rod area on the pull side). At the maximum operating pressure of 0.9 MPa, push force reaches 2805 N.
Only if you need the adjustable-stroke feature. The SCJ63X450-100 is physically longer than a fixed-stroke SC63 due to the rear adjusting mechanism. For a drop-in replacement of a fixed-stroke SC, use another SC. If you need the adjustability, ensure your mounting arrangement (centre trunnion, in this case) and port size (PT1/4) match.
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