Airtac SCJ100 Standard Cylinder SCJ100X70-20
The AirTAC Airtac SCJ100 Standard Cylinder SCJ100X70-20 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, 70mm nominal stroke, PT1/2 ports and adjustable end cushioning.
- BoreØ100 mm
- Nominal stroke70 mm
- Stroke adjust-20 mm
- Port sizePT1/2
- Rod threadM20×1.5
- CushionAdjustable, 29 mm
About the Airtac SCJ100 Standard Cylinder SCJ100X70-20
The SCJ100X70-20 is a double-acting, single-rod tie-rod cylinder with a rear-cap adjusting screw that provides up to 20 mm of field-adjustable stroke-end reduction. With a 100 mm bore, it delivers 3927 N of push force at 0.5 MPa, scaling to 7068 N at the maximum operating pressure of 0.9 MPa. The 25 mm piston rod and PT1/2 ports suit medium-to-heavy pneumatic positioning tasks where the final stroke length must be dialled in precisely on the machine.
This model uses a TPU seal for standard -20 to +70 °C service and PT threads. The adjustable screw sets only the stroke end position—it does not alter force or speed. The body length A(SCJ) is 245 mm, and the standard cushion length is 29 mm, providing reliable end-of-stroke deceleration.
Airtac SCJ100 Standard Cylinder SCJ100X70-20 Technical Specifications
| Model | Airtac SCJ100 Standard Cylinder SCJ100X70-20 |
|---|---|
| Series | SCJ adjustable-stroke tie-rod cylinder |
| Bore size | Ø100 mm |
| Nominal stroke | 70 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 SCJ100X70-20
| SCJ | Adjustable-stroke tie-rod cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×70 | 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 SCJ100X70-20 Is Used
Commissioning & Setup
Fine-tune the end position of a 100 mm bore actuator during machine commissioning without swapping cylinders or machining external hard stops.
Format Changeover
Adjust the stroke end for a product stopper or diverter on a packaging line when switching between different box or pallet sizes.
Wear Compensation
Take up mechanical play or seal wear in a clamping or pressing station by incrementally adjusting the rear screw to maintain consistent contact.
Is the Airtac SCJ100 Standard Cylinder SCJ100X70-20 the Right Cylinder?
Choose the SCJ100X70-20 when you need a 100 mm bore cylinder with a nominal 70 mm stroke that can be fine-tuned down by up to 20 mm during setup. If your force requirement is lower, the 80 mm bore SCJ80 series provides 2513 N push at 0.5 MPa; for higher force, the 125 mm bore SCJ125 series offers 6136 N. A fixed-stroke SC100 cylinder is a better choice when the stroke never needs field adjustment. For direct replacement, match the 100 mm bore, 70 mm nominal stroke, 20 mm adjust range, PT port thread, and basic mounting style. If side loads are present, add an external guide rod assembly or switch to a guided cylinder, as the SCJ's plain bearing is not designed to support radial forces.
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 SCJ100X70-20 FAQ
At 0.5 MPa, the push force is 3927 N and the pull force is 3681 N. At the maximum operating pressure of 0.9 MPa, the push force reaches 7068 N. Because it is a single-rod cylinder, the push force is always greater than the pull force due to the rod area.
You can replace an SC100 with an SCJ100 if you need the adjustable stroke feature, but you must match the nominal stroke, port thread (PT), and mounting style. The SCJ body is slightly longer to accommodate the adjusting screw, so verify the available space in your machine.
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 SCJ100X70-20
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.