Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20
The AirTAC Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20 is a genuine double-acting COMPACT cylinder (Ø16mm bore) whose extend end-position is set by an external M5×0.8 adjustment screw. You can dial the stroke anywhere from 50 to 70 mm on the machine — no shims, no part change.
- BoreØ16 mm
- Max stroke70 mm
- Adjustable range50–70 mm
- Adjuster threadM5×0.8
- Port sizeM5×0.8
- CushionFixed NBR bumper (both ends)
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20
The AirTAC SDAJ16X70-20 is a compact double-acting single-rod cylinder featuring an external M5x0.8 R-thread adjuster screw that dials the extend stop from 50 to 70 mm directly on your machine. Because the adjuster sets the mechanical stop rather than altering the piston area, output force remains identical to a standard SDA of this bore, delivering about 100.5 N push at 0.5 MPa. The short riveted body minimizes axial mounting depth where round-body or profile cylinders will not fit.
This 70 mm unit exceeds the 60 mm maximum standard stroke for a 16 mm bore, making it a non-standard, made-to-order part. It relies on a fixed NBR bumper at each end to decelerate the stroke, which is not an adjustable air cushion. Note that this specific SKU lacks a piston magnet and therefore cannot support reed or electronic switches; adding the -S option enables sensing.
Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20 Technical Specifications
| Model | Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20 |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø16 mm |
| Max stroke | 70 mm |
| Adjustable range | 50 – 70 mm |
| Adjuster thread (R) | M5×0.8 |
| Port size | M5×0.8 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M3×0.5 F / M5×0.8 male (B) |
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Fixed NBR bumper (both ends) |
The adjustment screw shortens the extend stroke by up to 20 mm. Force is unchanged from a standard SDA of the same bore. Specifications follow the official AirTAC SDAJ datasheet.
Theoretical Output Force (Ø16mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 101 N | 86 N |
| 0.7 MPa | 141 N | — |
| Max (@1.0 MPa) | 21 kgf | |
Force matches a standard SDA of the same bore; the adjuster only sets the stop position, not the area. Actual usable force is lower than theoretical due to friction.
Model Code: Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 16 | Bore size in mm. |
| ×70 | Maximum stroke length in mm. |
| -20 | Adjustable window (10/20/30/40/50/75/100 mm). |
| S / B | S = magnet; B = male-thread rod (both optional). |
Thread: PT standard. Related SDA-family variants: SDA (fixed stroke), SDAD (double rod), SSA/STA (single acting), SDAT (duplex), SDAW (duplex-end).
Where the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20 Is Used
Trial Positioning Jigs
Dial the extend stop between 50 and 70 mm to find the exact contact point for prototype parts without machining new spacers.
Changeover Diverters
Re-tune the 100.5 N push stroke on the fly when switching conveyor guide widths, saving downtime during product transitions.
Small Fixture Clamping
Use the compact riveted body to fit within tight test cells, adjusting the clamp reach precisely to seat delicate sensors.
Is the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20 the Right Cylinder?
When sizing this bore, compare forces both ways: stepping down to the SDAJ12 yields 56.5 N push at 0.5 MPa, while moving up to the SDAJ20 provides 157.1 N push at 0.5 MPa. Based on the 100.5 N push figure, a safe working load is roughly 60 N, allowing a vertical lift of approximately 5.1 kg with a 2:1 safety margin. Choose this model when you need frequent on-machine stroke tuning during setup or product changeovers.
Confirm the 16 mm bore, 70 mm stroke, 20 mm adjust window, and M5x0.8 port. This SKU has no magnet and a female rod-end thread. Because a plain cylinder does not hold its load on air loss or when the valve is centered—the piston drifts and the fixed bumper only decelerates near the end—implement an external rod lock or pilot-operated check valve if you need true load holding.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 50–70 mm
- ✓ Force at your working pressure
- ✓ Access to reach the R adjuster
- ✓ 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 Lock the M5×0.8 adjuster after setting the stroke.
- check Avoid side load on the piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ16X70-20 FAQ
At 0.5 MPa it provides 100.5 N push and 86.4 N pull. At 0.7 MPa it provides 140.7 N push and 121 N pull. The theoretical maximum push is 21 kgf at 1.0 MPa.
Turning the M5x0.8 R screw shortens the extend stop by up to 20 mm, giving a usable range of 50 to 70 mm. The screw is a mechanical stop, not a mid-stroke lock; the cylinder cannot hold a load without live air pressure.
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Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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