Airtac SCJ40 Standard Cylinder SCJ40X160-50
The AirTAC Airtac SCJ40 Standard Cylinder SCJ40X160-50 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 SCJ40X160-50
The SCJ40X160-50 is a double-acting, single-rod pneumatic cylinder with a 40 mm bore and a nominal 160 mm stroke, featuring a rear-cap adjusting screw that provides a 50 mm field-adjustable range for the stroke end. This allows machine builders to fine-tune the piston stopping position on the fly without swapping the cylinder, making it ideal for commissioning and format changeovers. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa, using a 16 mm diameter piston rod with an M12x1.25 male thread.
This tie-rod cylinder uses PT1/4 ports and includes an adjustable air cushion (21 mm long) to decelerate the piston smoothly at the end of travel. The body length A(SCJ) is 185 mm, slightly longer than a fixed-stroke SC of the same bore to accommodate the adjusting mechanism. It operates on filtered air from 0.15 to 1.0 MPa and is suitable for applications where the final stop position must be dialed in precisely after installation.
Airtac SCJ40 Standard Cylinder SCJ40X160-50 Technical Specifications
| Model | Airtac SCJ40 Standard Cylinder SCJ40X160-50 |
|---|---|
| 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 SCJ40X160-50
| 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 SCJ40X160-50 Is Used
Commissioning & Setup
Ideal for machine commissioning where the exact stroke length must be determined empirically. The 50 mm adjustment range lets technicians dial in the optimal end position for a pusher or stop without cutting rods or adding external hard stops.
Format Changeovers
Used on packaging lines to adjust a diverter gate or product stop for different box sizes. The rear screw can be quickly turned to shorten the stroke from 160 mm down to 110 mm, accommodating a new product format in minutes.
Wear Compensation
In clamping or pressing fixtures, the adjustable stroke can compensate for tooling wear or material thickness variations over time. The 50 mm range allows operators to advance the stroke end gradually, maintaining consistent clamp force without replacing the cylinder.
Is the Airtac SCJ40 Standard Cylinder SCJ40X160-50 the Right Cylinder?
Choose the SCJ40X160-50 when you need a mid-range force actuator with the flexibility to change the end-stop position by up to 50 mm without mechanical rework. If your load requires more force, consider stepping up to the 50 mm bore SCJ50 series, which provides 982 N of push force at 0.5 MPa. For a purely fixed-stroke application where adjustment is never needed, the standard SC40 series offers a simpler, more compact alternative. This model is a direct replacement for another AirTAC SCJ40 cylinder with a 160 mm nominal stroke, a 50 mm adjust range, PT ports, and basic mounting.
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 SCJ40X160-50 FAQ
At the standard 0.5 MPa operating pressure, this single-rod cylinder provides 628 N of push force (using the full 40 mm bore area) and 528 N of pull force (subtracting the 16 mm rod area). At the maximum operating pressure of 1.0 MPa, the theoretical push force is 1256 N.
A rear-cap adjusting screw lets you shorten the stroke end by up to 50 mm from the 160 mm nominal maximum. This is purely a mechanical stop adjustment for the piston's extended position. Pick the SCJ when you anticipate needing to change the stroke length in the field for setup, different products, or wear take-up. Choose a fixed-stroke SC if your stroke requirement is final and unchanging.
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