Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-30B
The AirTAC SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-30B is a genuine double-acting COMPACT cylinder (Ø20mm bore) whose extend end-position is set by an external M6×1.0 adjustment screw. You can dial the stroke anywhere from 45 to 75 mm on the machine — no shims, no part change.
- BoreØ20 mm
- Max stroke75 mm
- Adjustable range45–75 mm
- Adjuster threadM6×1.0
- 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 SDAJ20X75-30B
The AirTAC SDAJ20X75-30B is a compact double-acting double-rod cylinder featuring an external extend stop. An M6x1.0 adjuster screw lets you dial the outward stroke down from the 75mm maximum to any point between 45 and 75mm directly at the machine.
This variant utilizes a male M6x1.0 piston rod thread and lacks a piston magnet, meaning it cannot host reed or electronic switches without switching to the -S option. The short riveted body drastically cuts axial mounting depth where space is tight. End-of-stroke deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion, so consider an external shock absorber for high-energy cycles.
Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-30B Technical Specifications
| Model | Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-30B |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Max stroke | 75 mm |
| Adjustable range | 45 – 75 mm |
| Adjuster thread (R) | M6×1.0 |
| Port size | M5×0.8 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M4×0.7 F / M6×1.0 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 30 mm. SDAJ is a double-rod cylinder. Specifications follow the official AirTAC SDAJ datasheet.
Theoretical Output Force (Ø20mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 132 N | 132 N |
| 0.7 MPa | 185 N | — |
| Max (@1.0 MPa) | 27 kgf | |
SDAJ is double-rod: the rear rod that carries the stroke adjuster passes through the rear cover, so both piston faces lose rod area. Push is shown at the annular-area value (conservative), lower than a single-rod SDA push of the same bore. Actual usable force is lower than theoretical due to friction.
Model Code: Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-30B
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Maximum stroke length in mm. |
| -30 | 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 SDAJ20X75-30B Is Used
Trial Positioning Jigs
Dial in the exact 45 to 75mm extend point during prototype runs. The external screw allows rapid positional changes without disassembling the fixture to add shims.
Changeover Diverters
Adjust the pusher stroke on packaging lines for different carton widths.
Vertical Lift Stops
Set a precise mechanical lower limit for an 8 kg vertical lift. The fixed NBR bumper absorbs the end shock while the male M6 rod secures the payload.
Is the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-30B the Right Cylinder?
Choose this specific SKU if your fixture requires on-site stroke tuning between 45 and 75mm, uses an M5x0.8 air port, and specifically needs the male M6x1.0 rod end. Remember that a plain cylinder drifts when air is lost or the valve is centered; the fixed bumper only decelerates near the end of travel and does not lock the load. For secure load holding without live pressure, install an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 45–75 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 M6×1.0 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 SDAJ20X75-30B FAQ
The theoretical maximum push is 32 kgf at 1.0 MPa.
Turning the R (M6x1.0) screw shortens the extend end position by up to 30mm, giving a usable outward stroke range of 45 to 75mm. It acts purely as a mechanical stop and does not alter the cylinder's force or lock the piston mid-stroke.
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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.
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Most inquiries answered within 7-8 hours.
Related AirTAC SDAJ Cylinders
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