The AirTAC Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X60-40 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø63mm bore, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ63X60-40 is a double-acting, single-rod pneumatic cylinder that puts field-adjustable stroke control directly on the machine. A rear-cap adjusting screw lets you shorten the stroke end by up to 40 mm, so the effective stroke can be dialled anywhere between 20 mm and the nominal 60 mm maximum. With a 20 mm piston rod, PT1/4 ports, and an M16x1.5 rod thread, it delivers 1559 N of push force and 1402 N of pull force at 0.5 MPa, placing it in a force class suited for medium clamping, pressing, and positioning tasks.
The 63 mm bore body measures 197 mm in length (A dimension) and includes a 28 mm air cushion to decelerate the piston smoothly. Operating on filtered air from 0.15 to 1.0 MPa, this SCJ model handles speeds of 30-800 mm/s and temperatures from -20 to +70 °C with its standard TPU seals. The adjustable stroke end is a commissioning and changeover tool, not a force or speed regulator, allowing operators to fine-tune the stopping point for different tooling or product formats without removing the cylinder from the assembly.
| Model | Airtac AIRTAC SCJ63 Standard Cylinder SCJ63X60-40 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø63 mm |
| Nominal stroke | 60 mm |
| Stroke adjustment | Up to 40 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. |
| ×60 | Nominal (maximum) stroke length in mm. |
| -40 | 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.
Dial in the exact stroke end position during machine bring-up without cutting brackets or swapping cylinders. The 40 mm adjustment range lets technicians compensate for stack-up tolerances and achieve precise end-stop positioning on the first run.
Adjust the cylinder stroke to match different box or product sizes on a packaging line. The rear screw enables quick changeover between formats, reducing downtime compared to fixed-stroke cylinders that require mechanical stop changes.
In clamping or pressing fixtures, use the adjustable stroke to take up pad wear or material thickness variation over time. The 1559 N push force at 0.5 MPa provides consistent clamping pressure while the screw maintains the correct closed position.
Choose the SCJ63 bore when your application needs roughly 1560 N of push force at standard plant air. If you require more force, stepping up to the SCJ80 bore provides 2513 N push at 0.5 MPa; if you need a lighter, more compact unit, the SCJ50 bore delivers 982 N. This adjustable-stroke model is the right pick when the end position must be tuned on-site—during commissioning, after tooling wear, or for multi-format production. If your stroke length is fixed and never changes, the standard SC63 fixed-stroke cylinder is a simpler, cost-effective alternative.
For a direct replacement, match the SCJ63 bore, 60 mm nominal stroke, 40 mm adjust range, PT thread, and basic mounting. If you need a centre-trunnion pivot, specify the TC mounting style with the F-SC63TC bracket. At a 60 mm stroke, rod bending from side loads is minimal, but for any application where the rod sees radial force, add an external guide rail or switch to a guided cylinder to protect the rod bearing and seals.
Adjustable-stroke checklist
At 0.5 MPa, the SCJ63 bore generates 1559 N of push force (full bore area) and 1402 N of pull force (annular area minus the 20 mm rod). At the maximum operating pressure of 0.9 MPa, push force rises to 2805 N. The adjustable-stroke screw does not alter these force values—it only sets the stroke end position.
You can replace an SC63 with an SCJ63 if you need the field-adjustable stroke feature, but you must match the bore (63), nominal stroke (60 mm), port thread (PT), and mounting style. The SCJ body is slightly longer than the fixed-stroke SC to house the adjusting screw. If your application does not require on-machine stroke tuning, the standard SC63 is the direct fixed-stroke equivalent.
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