Airtac SCJ100 Standard Cylinder SCJ100X300-50
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X300-50 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. Ø100mm bore, 300mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke300 mm
- Stroke adjust-50 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X300-50
The SCJ100X300-50 is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, providing a 50 mm range to fine-tune the piston's stop position. With a 100 mm bore, it delivers a substantial 3927 N of push force at 0.5 MPa and up to 7068 N at 0.9 MPa, making it a powerful actuator for heavy-duty industrial tasks. The 25 mm diameter piston rod and PT1/2 port ensure robust air flow for consistent cycling.
The rear-cap adjusting screw allows operators to shorten the effective stroke from the 300 mm nominal maximum down by up to 50 mm without dismounting the cylinder. This design is ideal for commissioning, format changeovers, or compensating for mechanical wear, eliminating the need for external hard stops. The body length A(SCJ) is 245 mm, and it features a 29 mm adjustable air cushion for smooth deceleration.
Airtac SCJ100 Standard Cylinder SCJ100X300-50 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X300-50 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 300 mm |
| Stroke adjustment | Up to 50 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 SCJ100X300-50
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×300 | 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 SCJ100 Standard Cylinder SCJ100X300-50 Is Used
Commissioning & Setup
During machine commissioning, the 50 mm adjustment range allows engineers to precisely set the end-of-stroke position for a clamping or pressing operation without fabricating custom shims or mechanical stops.
Product Format Changeover
On a packaging line, the stroke can be quickly adjusted to accommodate different box sizes. The high push force of 3927 N at 0.5 MPa reliably actuates heavy tooling like case erectors or pallet dispensers.
Wear Compensation
In a high-cycle stamping or riveting fixture, the adjustable screw can be turned to take up slack from tooling wear over time, maintaining precise contact without replacing the cylinder or adding external stops.
Is the Airtac SCJ100 Standard Cylinder SCJ100X300-50 the Right Cylinder?
Choose the SCJ100X300-50 when you need a high-force actuator with the flexibility to dial in the exact stroke end position on the machine. If your application requires even more force, consider stepping up to the 125 mm bore model, which provides 6136 N of push at 0.5 MPa. For a simpler, fixed-stroke solution without the adjustment mechanism, the standard SC100X300 cylinder is a direct alternative. This SCJ model is a direct replacement for any AirTAC SCJ100X300-50 cylinder with a basic mount, TPU seals, and PT ports.
Given the 300 mm stroke length, be mindful of potential side loading on the 25 mm rod. If your application involves significant lateral forces, an external guide rail or a switch to a guided cylinder is strongly recommended to prevent rod bending and ensure long seal life.
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 SCJ100 Standard Cylinder SCJ100X300-50 FAQ
The theoretical push force at 0.5 MPa is 3927 N, and the pull force on the return stroke is 3681 N due to the rod area. At the maximum operating pressure of 1.0 MPa, the push force reaches 7068 N. Always design your system around your specific operating pressure.
Yes, it can be a direct dimensional replacement if you need the ability to fine-tune the stroke end. The SCJ100X300-50 has the same mounting footprint and port size (PT1/2) as the fixed-stroke SC series but includes the rear adjusting screw, making the overall body length slightly longer at 245 mm.
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