Airtac SCJ100 Standard Cylinder SCJ100X40-20S
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X40-20S is a genuine double-acting SINGLE-ROD air cylinder with a rear-cap ADJUSTING SCREW: the stroke end is field-adjustable within a 20 mm range without swapping the cylinder. Ø100mm bore, 40mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke40 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X40-20S
The SCJ100X40-20S is a double-acting, single-rod pneumatic cylinder from AirTAC with a 100 mm bore and a 40 mm nominal stroke. Its defining feature is the rear-cap adjusting screw, which provides up to 20 mm of field-adjustable stroke-end reduction, allowing precise fine-tuning without removing the cylinder. The built-in magnet (suffix -S) enables direct mounting of CMSG, DMSG, or EMSG reed and solid-state sensors along the tie-rod barrel for reliable end-of-stroke detection.
This 100 mm bore model delivers a substantial push force of 3927 N at 0.5 MPa and can reach 7068 N at the maximum operating pressure of 0.9 MPa. The pull force is 3681 N at 0.5 MPa, reflecting the 25 mm piston rod diameter. With a PT1/2 port, a 29 mm air cushion for end-of-stroke deceleration, and a body length A of 245 mm, it is a robust solution for heavy-duty applications requiring adjustable stopping positions.
Airtac SCJ100 Standard Cylinder SCJ100X40-20S Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X40-20S |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 40 mm |
| Stroke adjustment | Up to 20 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 SCJ100X40-20S
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×40 | Nominal (maximum) stroke length in mm. |
| -20 | 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 SCJ100X40-20S Is Used
End-Stop Commissioning
During machine setup, the 20 mm adjustment screw allows technicians to quickly fine-tune the actuator's stop point for a 100 mm bore press or clamping fixture, eliminating the need for shims or external hard stops.
Wear Compensation
In high-cycle assembly operations, the adjustable stroke can be periodically tweaked to compensate for wear on tooling tips or contact surfaces, maintaining consistent part engagement without replacing the cylinder.
Product Format Changeover
For a packaging line handling different box sizes, the SCJ100X40-20S allows operators to quickly adjust the pusher stroke end by up to 20 mm, enabling a fast changeover between product formats using a single actuator.
Is the Airtac SCJ100 Standard Cylinder SCJ100X40-20S the Right Cylinder?
Choose the SCJ100X40-20S when you need the high force of a 100 mm bore (3927 N push at 0.5 MPa) combined with the ability to dial in the final stroke position on the machine. If your force requirement is lower, stepping down to an 80 mm bore reduces the push force to 2513 N at 0.5 MPa. For a fixed, non-adjustable stroke, the standard SC100 series offers the same force ratings without the rear adjustment mechanism. When replacing an existing unit, ensure the replacement matches the 100 mm bore, 40 mm nominal stroke, 20 mm adjustment range, PT1/2 port thread, basic mounting, and the -S magnet option.
Adjustable-stroke checklist
- ✓ Need to fine-tune stroke on the line?
- ✓ Nominal stroke + adjust range (-20)
- ✓ 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 SCJ100X40-20S FAQ
At the standard 0.5 MPa operating pressure, the push force is 3927 N and the pull force is 3681 N. The force increases linearly with pressure, reaching a maximum push force of 7068 N at the 0.9 MPa operating limit. Because this is a single-rod cylinder, the push force is always greater than the pull force.
A rear-cap screw allows you to shorten the stroke end by up to 20 mm from the 40 mm nominal maximum. It is a mechanical stroke limiter, not a force or speed control. The cylinder does not lock or hold its position when air pressure is lost; for load holding, an external pilot-operated check valve or rod brake is required.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC SCJ Adjustable-Stroke Cylinders
Request a Quote for Airtac SCJ100 Standard Cylinder SCJ100X40-20S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.