Airtac SCJ100 Standard Cylinder SCJ100X450-75
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X450-75 is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 75 mm range without swapping the cylinder. Ø100mm bore, 450mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke450 mm
- Stroke adjust-75 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X450-75
The SCJ100X450-75 delivers a robust 3927 N of push force at 0.5 MPa, making it a capable actuator for medium-to-heavy industrial linear tasks. Its key differentiator is the rear-cap adjusting screw, which provides a 75 mm range to fine-tune the stroke end position on the fly—ideal for commissioning, format changeovers, or compensating for tooling wear without removing the cylinder. This model uses a 25 mm diameter piston rod and PT 1/2 ports.
Built on the durable SC tie-rod platform, this double-acting, single-rod cylinder features an adjustable air cushion for smooth deceleration and a body length A of 245 mm. The 450 mm nominal stroke is well within the 1500 mm maximum standard stroke for the 100 mm bore, ensuring it is a standard, readily available configuration. The default seal material is TPU, rated for an operating temperature range of -20 to +70 °C.
Airtac SCJ100 Standard Cylinder SCJ100X450-75 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X450-75 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 450 mm |
| Stroke adjustment | Up to 75 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 SCJ100X450-75
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×450 | Nominal (maximum) stroke length in mm. |
| -75 | 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 SCJ100X450-75 Is Used
Commissioning & Process Tuning
The 75 mm adjustment screw allows engineers to dial in the exact stroke end position during machine setup and commissioning. This is far faster than shimming or repositioning fixed stops, accelerating the path to full production.
Product Format Changeovers
On packaging or assembly lines, the stroke can be quickly re-adjusted for different product sizes. The SCJ100X450-75 provides the high force to push heavy products while offering the flexibility to switch between formats without mechanical modifications.
Wear Compensation in Clamping
In high-cycle clamping or pressing fixtures, the adjustable stroke compensates for wear on gripper pads or tooling surfaces. The operator can incrementally increase the stroke end to maintain consistent clamping force over the tool's lifespan.
Is the Airtac SCJ100 Standard Cylinder SCJ100X450-75 the Right Cylinder?
Choose the SCJ100X450-75 when you need the high force of a 100 mm bore with the flexibility to adjust the stroke end by up to 75 mm. If your force requirement is lower, stepping down to an 80 mm bore reduces push force to 2513 N at 0.5 MPa. For applications needing even more power, the 125 mm bore provides 6136 N. If your application requires a fixed, non-adjustable stroke, the standard SC100X450 is a more economical choice. For a direct replacement, match the 100 mm bore, 450 mm nominal stroke, 75 mm adjustment range, PT port thread, and basic mounting style.
With a 450 mm stroke, this cylinder acts as a long column under load. To prevent rod buckling and ensure bearing life, you must manage side loads. For unsupported pushing, consider an external guide rail system. For guided linear motion, a guided cylinder or a rodless actuator may be a more suitable and compact alternative to a standalone tie-rod cylinder.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-75)
- ✓ 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 SCJ100X450-75 FAQ
At an operating pressure of 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. Because it is a single-rod cylinder, the push force is higher than the pull force. The maximum push force at the 0.9 MPa operating limit is 7068 N.
Yes, provided the mounting, bore, and porting are compatible. The SCJ100X450-75 is a direct dimensional match for an SC100X450 fixed-stroke cylinder. The key difference is the rear adjusting screw, which adds a small amount to the overall length but gives you the ability to shorten the stroke end by up to 75 mm.
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