Airtac SCJ100 Standard Cylinder SCJ100X85-30S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X85-30S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 30 mm range without swapping the cylinder. Ø100mm bore, 85mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke85 mm
- Stroke adjust-30 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X85-30S
The AirTAC SCJ100X85-30S is a double-acting, single-rod pneumatic cylinder with a field-adjustable stroke end, giving you a 30 mm fine-tuning range on the nominal 85 mm stroke. With a 100 mm bore, it delivers a substantial 3927 N of push force at 0.5 MPa (7068 N at 0.9 MPa), making it a powerful workhorse for pressing, clamping, and positioning tasks where the final stroke length needs on-machine calibration.
This model includes a built-in magnet (-S suffix), allowing you to clamp CMSG, DMSG, or EMSG sensors directly onto the tie-rod barrel for non-contact position sensing. The cylinder uses a 25 mm piston rod, PT1/2 ports, and an M20x1.5 rod thread, with a 29 mm air cushion to decelerate the piston smoothly. The body length A is 245 mm, and the adjustable screw only sets the stroke end position—it does not alter the cylinder's force output.
Airtac SCJ100 Standard Cylinder SCJ100X85-30S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X85-30S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 85 mm |
| Stroke adjustment | Up to 30 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 SCJ100X85-30S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×85 | Nominal (maximum) stroke length in mm. |
| -30 | 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 SCJ100X85-30S Is Used
Commissioning & Setup
The 30 mm adjustment screw lets technicians fine-tune the end-of-stroke position during machine commissioning without swapping cylinders or machining custom stops, saving hours of setup time on a new production line.
Format Changeovers
In packaging or material handling, the adjustable stroke allows operators to quickly adapt the cylinder's reach for different box sizes or pallet dimensions, minimizing downtime between production runs.
Wear Compensation
For high-cycle clamping fixtures, the stroke-end screw can be advanced over time to compensate for pad wear or tooling compression, maintaining consistent clamp force without replacing the actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X85-30S the Right Cylinder?
Choose the SCJ100X85-30S when you need a high-force cylinder with a stroke that must be dialed in precisely during setup or changeover. If your application requires even more force, the next step up is the SCJ125 bore, which provides 6136 N of push at 0.5 MPa. For a lower force class, the SCJ80 bore offers 2513 N. The adjustable stroke is ideal for commissioning, but if your stroke length is permanently fixed, a standard SC100X85 cylinder is a more economical choice.
This unit is a direct replacement for another AirTAC SCJ100 cylinder with an 85 mm nominal stroke and a 30 mm adjustment range, with PT ports and a magnet. For strokes of 300 mm or more, the 100 mm bore's 25 mm rod is susceptible to side-loading and buckling; use an external guide or switch to a guided cylinder to protect the rod and seals.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-30)
- ✓ 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 SCJ100X85-30S FAQ
The push force is 3927 N at 0.5 MPa and 7068 N at the maximum operating pressure of 0.9 MPa. The pull force is lower due to the single 25 mm rod, providing 3681 N at 0.5 MPa. The adjusting screw does not change these force values.
A rear-cap screw sets the stroke end position within a 30 mm range, allowing you to fine-tune the piston's stopping point. Choose this SCJ model when you need to calibrate the stroke on the machine for commissioning, format changes, or wear take-up. If the stroke is a fixed, known value, the standard SC series is a simpler, more cost-effective option.
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