Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-40
The AirTAC SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-40 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 35 to 75 mm on the machine — no shims, no part change.
- BoreØ20 mm
- Max stroke75 mm
- Adjustable range35–75 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 SDAJ20X75-40
The AirTAC SDAJ20X75-40 is a compact double-acting double-rod cylinder featuring an on-site adjustable extend stop. An external M6x1.0 adjuster screw lets you dial the forward end-position anywhere between 35 and 75 mm without changing parts.
The short riveted body saves valuable axial mounting depth where larger profile or round-body units fail to fit. End-of-travel energy is managed strictly by a fixed NBR bumper, which decelerates the piston rather than acting as an adjustable air cushion. This specific SKU lacks a piston magnet, so it cannot host reed or electronic switches.
Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-40 Technical Specifications
| Model | Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-40 |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Max stroke | 75 mm |
| Adjustable range | 35 – 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 40 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 SDAJ20X75-40
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Maximum stroke length in mm. |
| -40 | 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 SDAJ20X75-40 Is Used
Trial Positioning Jigs
Dial in the exact 35 to 75 mm extend point during short-run prototyping to find the optimal clamping depth before locking the M6 screw.
Shallow-Footprint Bending
Fit the compact riveted body into tight press dies where axial space is restricted, fine-tuning the forming stroke without swapping shims.
Is the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-40 the Right Cylinder?
When sizing this 20 mm bore actuator, evaluate your force requirements bidirectionally.
Choose this model if your fixture requires frequent on-machine stroke tuning across a 35 to 75 mm forward window. Confirm your setup needs an M5x0.8 port, a female M4x0.7 rod-end thread, and a 40 mm adjustment range. Remember that a plain cylinder drifts when air is lost or the valve centers; the fixed bumper and mechanical stop do not lock the load. Specify an external rod lock or pilot-operated check valve for true position holding.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 35–75 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 SDAJ20X75-40 FAQ
Operating speed ranges from 30 to 500 mm/s.
This specific SKU ships without a piston magnet, so it cannot accept reed or electronic switches; you must select the -S option code for sensing capabilities.
Authorized Export Seller
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.
Related AirTAC SDAJ Cylinders
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