The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X60-20TC 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 SCJ40X60-20TC brings field-adjustable stroke tuning to a 40 mm bore tie-rod cylinder, delivering 628 N of push force at 0.5 MPa (pull 528 N). The rear-cap screw lets you shorten the stroke end by up to 20 mm without removing the cylinder, making commissioning and fine-tuning far quicker than swapping fixed-stroke units.
This model ships with a centre trunnion (TC) mount and the TCM1 bracket, so it can pivot freely for swinging loads. The 16 mm diameter piston rod, PT1/4 ports, and 21 mm air cushion are standard for the bore, while the SCJ body length A is 185 mm — slightly longer than a fixed-stroke SC to house the adjusting mechanism.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X60-20TC |
|---|---|
| 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.
Fine-tune the end position of a pusher or stop during machine commissioning. The 20 mm screw adjustment lets technicians dial in the exact stroke end without swapping cylinders or fabricating shims.
On packaging or sorting lines that handle multiple product sizes, the adjustable stroke allows operators to quickly reset the cylinder stroke for a new format, reducing downtime between batches.
In clamping or pressing fixtures where tooling or contact surfaces wear over time, the rear adjusting screw can be advanced to maintain the correct final position, extending the service interval of the tooling.
Choose the SCJ40 when you need to dial in a stroke end on the machine, especially for format changes or wear take-up. If you need more force, the 50 mm bore SCJ50 delivers 982 N push at 0.5 MPa; for a lighter, more compact solution, the 32 mm bore provides 402 N. The TC trunnion mount is ideal for applications where the cylinder body must pivot — if your load moves in a straight line only, a basic or foot-mounted SCJ40 may be simpler.
For replacement, match the SCJ40 bore, 60 mm nominal stroke, 20 mm adjust range, PT port thread, and TC mounting (F-SC40TC). If your application has significant side loads or the rod is fully extended, consider an external guide rail or a guided cylinder to protect the rod bearing and seals from bending stress.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N. At the maximum operating pressure of 1.0 MPa, theoretical push force reaches 1280 N (approx. 128 kgf). Because it is a single-rod cylinder, push force is always greater than pull force.
A rear-cap adjusting screw sets the stroke end position, shortening the nominal 60 mm stroke by up to 20 mm. Pick the SCJ when you need to fine-tune the stroke on the machine — for setup, changeovers, or wear take-up. Choose a fixed-stroke SC if your stroke requirement is final and will never need field adjustment.
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