The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X160-20 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. Ø40mm bore, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
The SCJ40X160-20 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, letting you fine-tune the stopping position by up to 20 mm via the rear-cap screw. With a 40 mm bore and 16 mm rod, it delivers 628 N of push force and 528 N of pull force at 0.5 MPa, making it a solid mid-range actuator for tasks that need on-machine tweaking without swapping the cylinder.
The body length A(SCJ) is 185 mm, slightly longer than a fixed-stroke SC of the same bore to house the adjustment mechanism. It uses a PT1/4 port, an M12x1.25 rod thread, and a 21 mm air cushion to decelerate the piston quietly. The 160 mm nominal stroke is well within the 1200 mm maximum standard stroke for this bore.
| Model | Airtac SCJ40 Standard Cylinder SCJ40X160-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 160 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. |
| ×160 | 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 stop during machine bring-up without dismounting the cylinder. The 20 mm rear screw adjustment lets technicians quickly dial in the exact stroke needed for a new tool or fixture.
On packaging or sorting lines, adjust the pusher stroke when switching between product sizes. The SCJ40X160-20 provides 628 N of push force at standard line pressure, enough for most light-to-medium diverting tasks.
In clamping or pressing applications, use the adjustable stroke to take up mechanical wear on pads or tooling over time, maintaining consistent contact force without reprogramming the PLC or adding shims.
Choose the SCJ40 when you need to dial in a stroke end during commissioning or format changes—the 20 mm adjustment range eliminates the need for external hard stops. If your force requirement grows, stepping up to the 50 mm bore SCJ50 series provides 982 N of push at 0.5 MPa. For applications where the stroke is permanently fixed and never needs field adjustment, the standard SC40 fixed-stroke cylinder is a simpler, slightly shorter alternative.
A direct replacement must match the 40 mm bore, 160 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting. If you need position sensing, order the SCJ40X160-20S variant with a built-in magnet for CMSG/DMSG sensors. For strokes of 300 mm or longer, evaluate side-loading on the 16 mm rod and consider adding an external linear guide.
Adjustable-stroke checklist
At 0.5 MPa, the push force is 628 N and the pull force is 528 N (the difference is due to the 16 mm single rod reducing the piston area on the retract side). At the maximum operating pressure of 0.9 MPa, push force reaches 1130 N.
Yes, if you need the adjustable stroke feature. The SCJ body is slightly longer (185 mm A-dimension) to house the rear adjusting screw. Ensure the 160 mm nominal stroke and 20 mm adjust range fit your space, and match the port thread (PT) and mounting style. If you do not need adjustability, the standard SC40 is a direct dimensional match for a fixed-stroke SC40.
Genuine AirTAC parts produced by AirTAC factory.
Covers non-human-caused product damage.
Standard models usually ship in 3-4 days.
Most inquiries answered within 7-8 hours.
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.