Airtac SCJ100 Standard Cylinder SCJ100X300-40S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X300-40S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 40 mm range without swapping the cylinder. Ø100mm bore, 300mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke300 mm
- Stroke adjust-40 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X300-40S
The SCJ100X300-40S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke, offering a nominal 300mm stroke that can be fine-tuned by up to 40mm via the rear-cap adjusting screw. This model delivers a substantial 3927 N of push force at 0.5 MPa, driven by a 25mm diameter piston rod, making it a powerful solution for applications requiring precise end-position calibration.
Equipped with a built-in magnet (-S suffix), this cylinder allows for direct mounting of CMSG/DMSG/EMSG reed or solid-state sensors along the tie-rod barrel for reliable, non-contact position feedback. The standard PT1/2 port and TPU seals suit a wide range of general industrial environments, with an operating pressure from 0.15 to 1.0 MPa and a 29mm air cushion for smooth deceleration.
Airtac SCJ100 Standard Cylinder SCJ100X300-40S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X300-40S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 40 mm (rear adjusting screw) |
| Acting type | Double acting (single rod) |
| Port size | PT1/2 |
| Rod thread | M20×1.5 |
| 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, 29 mm |
| Max stroke | Up to 1500 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 (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 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 SCJ100 Standard Cylinder SCJ100X300-40S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | Nominal (maximum) stroke length in mm. |
| -40 | 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 SCJ100 Standard Cylinder SCJ100X300-40S Is Used
Commissioning & Setup
Allows engineers to dial in the exact stroke end position on a new assembly line without swapping cylinders, saving hours of mechanical adjustment during machine bring-up.
Product Format Changeover
Quickly adapt a pusher or stop gate to different product sizes on a conveyor by adjusting the cylinder's stroke end, enabling fast changeovers between production runs.
Wear Compensation
In high-cycle clamping or pressing fixtures, the adjustable stroke can be used to take up mechanical wear over time, maintaining consistent clamping force and position without replacing the actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X300-40S the Right Cylinder?
With a 3927 N push force at 0.5 MPa, this SCJ100 cylinder is a robust choice for heavy-duty positioning. If your force requirement is lower, the 80mm bore SCJ80 provides 2513 N of push force in a more compact package. For applications needing more power, stepping up to the SCJ125 offers 6136 N of push force. If your application does not require the ability to fine-tune the stroke end on the machine, a fixed-stroke SC100X300 cylinder is a simpler alternative.
For a direct replacement, match the 100mm bore, 300mm nominal stroke, 40mm adjustable range (-40), PT port thread, and the built-in magnet (-S). This 300mm stroke length can introduce side-loading risks; ensure the load is guided externally or consider using a guided cylinder if the rod is subject to significant lateral forces.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-40)
- ✓ 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 SCJ100 Standard Cylinder SCJ100X300-40S FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force is 3681 N due to the rod area. At the maximum operating pressure of 1.0 MPa, the push force reaches 7854 N. Always apply a safety factor for real-world dynamic loads.
A rear-cap screw limits the piston's stroke end within a 40mm range, allowing you to shorten the 300mm nominal stroke without disassembling the cylinder. It is a direct dimensional replacement for another SCJ100X300-40S. It cannot be directly replaced by a fixed-stroke SC100 cylinder unless you no longer need the adjustability feature.
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