Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-20B
The AirTAC SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-20B 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 55 to 75 mm on the machine — no shims, no part change.
- BoreØ20 mm
- Max stroke75 mm
- Adjustable range55–75 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 SDAJ20X75-20B
The AirTAC SDAJ20X75-20B is a compact double-acting double-rod cylinder featuring an external adjustable extend stop. An M6x1.0 adjuster screw lets you dial the forward stroke down by up to 20 mm on-site, yielding a usable extension range of 55 to 75 mm without swapping shims or components. Retract travel remains full length.
This variant features a male-thread M6x1.0 piston rod end for secure tooling attachment. The short riveted body significantly reduces axial mounting depth compared to round-body alternatives, fitting easily into tight machine envelopes. End-of-travel deceleration is handled by a fixed NBR bumper rather than an adjustable air cushion. Note this specific SKU lacks a piston magnet, so it cannot support magnetic sensing.
Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-20B Technical Specifications
| Model | Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-20B |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Max stroke | 75 mm |
| Adjustable range | 55 – 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 20 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 SDAJ20X75-20B
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | 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 SDAJ20X75-20B Is Used
Changeover Diverter Arms
Quickly reconfigure a sorting gate for different package sizes on the fly; the external adjuster re-sets the stroke window without dismantling the compact riveted body.
Compact Edge Guides
Fit the short-profile body into narrow transfer passages to push lightweight panels, relying on the fixed NBR bumper to absorb the end-of-stroke shock.
Is the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-20B the Right Cylinder?
When sizing this unit, evaluate the neighbouring bores both ways. Choose this specific model if your fixture requires on-site stroke tuning during commissioning or frequent product changeovers. It features an M5x0.8 air port, a 20 mm adjustment window, and a male M6x1.0 rod thread. Remember that a plain cylinder does not hold its load if air pressure drops or the valve is centred; the piston will drift. For secure load holding without live pressure, install an external rod lock or a pilot-operated check valve.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 55–75 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 SDAJ20X75-20B FAQ
The theoretical maximum push is 32 kgf at 1.0 MPa. It operates between 0.15 and 1.0 MPa at speeds of 30-500 mm/s.
The M6x1.0 R screw mechanically shortens the extend stop by up to 20 mm, giving a usable forward range of 55 to 75 mm; it does not alter force or lock mid-stroke. This specific SKU lacks a piston magnet, so magnetic switches cannot be used; you would need the -S variant to enable reed or electronic sensing.
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
Request a Quote for Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-20B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.