The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X60-20S 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. Ø40mm bore, 60mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X60-20S brings field-adjustable stroke control to a 40 mm bore package, delivering 628 N of push force at 0.5 MPa and up to 1130 N at the maximum operating pressure of 0.9 MPa. Its rear-cap adjusting screw provides a 20 mm range to fine-tune the stroke end, making it a practical solution for commissioning adjustments or format changeovers without swapping the cylinder.
This model includes a built-in magnet (suffix -S), allowing CMSG, DMSG, or EMSG sensors to clamp directly onto the tie-rod barrel for reliable end-of-stroke detection. The 16 mm piston rod, PT1/4 port, and 21 mm air cushion are standard for this bore, and the SCJ body length A measures 185 mm.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X60-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 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 | M12×1.25 |
| 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 | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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. |
|---|---|
| 40 | 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.
Engineers can fine-tune the 20 mm stroke end during initial machine setup to perfectly align actuators with tooling or stops, eliminating the need for shims or custom brackets.
On packaging lines, the adjustable stroke allows operators to quickly reset the pusher stroke for different box or carton sizes without mechanical disassembly, reducing downtime.
In clamping or pressing fixtures, the screw can be advanced over time to compensate for pad wear or material compression, maintaining consistent clamping force without replacing parts.
Choose the SCJ40X60-20S when you need to dial in a precise stroke end position on a machine with a 40 mm bore. If your application requires more force, stepping up to the 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa. For applications where the stroke never needs adjustment, the fixed-stroke SC40 cylinder is a simpler, cost-effective alternative.
To replace an existing unit, match the 40 mm bore, 60 mm nominal stroke, 20 mm adjustment range, PT port thread, and the built-in magnet. This model is a basic configuration without a mounting bracket, so confirm your existing mounting style matches or order the required FA, LB, or TC accessory from the F-SC40 series.
Adjustable-stroke checklist
At 0.5 MPa, it delivers 628 N of push force and 528 N of pull force. The maximum push force at the 0.9 MPa operating limit is 1130 N. The pull force is lower due to the 16 mm piston rod area.
Yes, the built-in magnet (-S suffix) is designed for AirTAC CMSG, DMSG, and EMSG series sensors. They clamp onto the tie-rod barrel just like on a standard SC cylinder with a magnet option.
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