Airtac SCJ40 Standard Cylinder SCJ40X160-50S
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X160-50S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 50 mm range without swapping the cylinder. Ø40mm bore, 160mm nominal stroke, PT1/4 ports and adjustable end cushioning.
- BoreØ40 mm
- Nominal stroke160 mm
- Stroke adjust-50 mm
- Port sizePT1/4
- Rod threadM12×1.25
- CushionAdjustable, 21 mm
About the Airtac SCJ40 Standard Cylinder SCJ40X160-50S
The SCJ40X160-50S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, delivering 628 N of push force at 0.5 MPa. Its rear-cap adjusting screw provides up to 50 mm of stroke-end reduction, allowing operators to fine-tune the piston's stop position without dismounting the cylinder. The 16 mm diameter piston rod and PT1/4 port ensure a robust connection for mid-range automation tasks.
This model features a built-in magnet (-S suffix), enabling direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for precise end-of-stroke detection. The body length A is 185 mm, and the unit is equipped with an adjustable air cushion to decelerate the piston smoothly. As a genuine AirTAC component, it provides reliable, repeatable performance for commissioning and format changeovers.
Airtac SCJ40 Standard Cylinder SCJ40X160-50S Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X160-50S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø40 mm |
| Nominal stroke | 160 mm |
| Stroke adjustment | Up to 50 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.
Theoretical Output Force (Ø40mm)
| 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.
Model Code: Airtac SCJ40 Standard Cylinder SCJ40X160-50S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 40 | Bore size in mm. |
| ×160 | Nominal (maximum) stroke length in mm. |
| -50 | 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.
Where the Airtac SCJ40 Standard Cylinder SCJ40X160-50S Is Used
Commissioning & Setup
The 50 mm adjustment range allows engineers to dial in the exact stroke end-stop during machine commissioning, accommodating minor assembly variations without needing to swap out the cylinder.
Product Format Changeover
Quickly adapt the cylinder's stroke for different product sizes on a packaging line. The rear screw adjustment makes format changes fast and tool-free, minimizing downtime.
Wear Compensation
In high-cycle clamping or pressing applications, the adjustable stroke can be used to take up mechanical wear on tooling or contact surfaces over time, maintaining consistent process force and position.
Is the Airtac SCJ40 Standard Cylinder SCJ40X160-50S the Right Cylinder?
Choose the SCJ40X160-50S when your application requires a 40 mm bore with a nominal 160 mm stroke and the ability to trim the stroke end by up to 50 mm in the field. If you need more force, stepping up to a 50 mm bore provides 982 N of push force at the same 0.5 MPa pressure. For applications where the stroke length is fixed and will never need adjustment, the standard SC series fixed-stroke cylinder is a simpler, more economical alternative. This SCJ model is a direct replacement for any AirTAC SCJ40X160-50S with a PT port, basic mounting, and magnet.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-50)
- ✓ Required force at your working pressure
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear adjusting screw, then lock it before running.
- check Adjust end cushion screws for smooth stops.
- check Use SCJ mounting accessory (FA / LB / TC / TCM1).
- check Installation by qualified personnel per AirTAC docs.
Airtac SCJ40 Standard Cylinder SCJ40X160-50S FAQ
At an operating pressure of 0.5 MPa, this 40 mm bore cylinder generates 628 N of push force and 528 N of pull force. The push force is higher because the single rod reduces the effective piston area on the return stroke.
A rear-cap screw physically limits the piston's stroke end by up to 50 mm. It is a mechanical stop for adjustment, not a locking device. The cylinder will not hold its position if air pressure is lost; an external rod lock or pilot-operated check valve is required for load holding.
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