The AirTAC Airtac SCJ50 Standard Cylinder SCJ50X60-20 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø50mm bore, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ50X60-20 is a double-acting, single-rod pneumatic cylinder that integrates a rear-cap adjusting screw, giving you up to 20 mm of field-adjustable stroke-end control without swapping the cylinder. With a 50 mm bore and 20 mm rod, it delivers 982 N of push force at 0.5 MPa, making it a solid workhorse for mid-range clamping, pressing, and positioning tasks.
This tie-rod cylinder has a body length of 194 mm (A dimension) and uses a PT1/4 port. The adjustable screw shortens the stroke end, letting operators fine-tune the stopping position during commissioning or format changes. Its 21 mm air cushion decelerates the piston smoothly, reducing end-of-stroke impact.
| Model | Airtac SCJ50 Standard Cylinder SCJ50X60-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø50 mm |
| Nominal stroke | 60 mm |
| Stroke adjustment | Up to 20 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, 21 mm |
| Max stroke | Up to 1200 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 | 982 N | 825 N |
| 0.7 MPa | 1374 N | — |
| Max (@1.0 MPa) | 200 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. |
|---|---|
| 50 | Bore size in mm. |
| ×60 | Nominal (maximum) stroke length in mm. |
| -20 | 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, use the 20 mm rear screw to micro-adjust the cylinder's end stop for perfect alignment with mating parts, eliminating the need for shims or re-machining brackets.
On a packaging line, quickly adjust the stroke end when switching between product sizes. The screw lets an operator change the pusher's stopping point in seconds without tools.
In a clamping fixture, the adjustable stroke takes up wear on contact pads over time. A simple turn of the screw restores full clamping force without replacing the cylinder.
Choose the SCJ50X60-20 when you need to dial in a precise stroke end on the machine without adding external hard stops. If your force requirement grows, stepping up to the 63 mm bore provides 1559 N of push at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC series is a simpler, cost-effective alternative. A direct replacement must match the 50 mm bore, 60 mm nominal stroke, 20 mm adjustment range, PT1/4 port, basic mounting, and no magnet.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 982 N and the pull force is 825 N. The push force is higher because the single rod reduces the piston area on the return side. At the maximum operating pressure of 0.9 MPa, the push force reaches 1767 N.
You can, provided the bore, port size, and mounting match. The SCJ50X60-20 has a body length of 194 mm, which is slightly longer than a fixed-stroke SC50 to accommodate the adjusting screw. Ensure you have the extra space in your machine layout.
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