Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-75B
The AirTAC SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-75B 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 0 to 75 mm on the machine — no shims, no part change.
- BoreØ20 mm
- Max stroke75 mm
- Adjustable range0–75 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 SDAJ20X75-75B
The AirTAC SDAJ20X75-75B is a compact double-acting double-rod cylinder featuring an external adjustable extend stop. By turning the R (M6x1.0) adjuster screw, you can dial the extend position anywhere from 0 to 75 mm directly on your machine, eliminating the need for shims or part swaps.
This variant features a male M6x1.0 threaded piston rod (Ø8 mm) for secure external mounting. The short riveted body saves valuable axial depth where round-body or profile cylinders cannot fit. End-of-stroke deceleration is handled by a fixed NBR bumper, which absorbs shock but is not an adjustable air cushion. Note this SKU lacks a piston magnet, so it cannot host reed or electronic switches unless upgraded to an -S variant.
Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-75B Technical Specifications
| Model | Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-75B |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø20 mm |
| Max stroke | 75 mm |
| Adjustable range | 0 – 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 75 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 SDAJ20X75-75B
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 20 | Bore size in mm. |
| ×75 | Maximum stroke length in mm. |
| -75 | 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 SDAJ20X75-75B Is Used
Prototype Dialing
Ideal for prototype assembly stations where the extend stop must be dialed precisely between 0 and 75 mm during trial runs without machining new spacers.
Changeover Reject Arms
Quickly reposition a sorting diverter on a packaging line by turning the M6x1.0 adjuster, accommodating different product lengths on the fly.
Vertical Lift Stops
Safely set a precise lower descent limit for an 8 kg vertical lift actuator, using the mechanical stop to define the exact resting position.
Is the Airtac SDAJ12~25 Adjustable Ultra-Thin Cylinder SDAJ20X75-75B the Right Cylinder?
Choose this 20 mm bore if your application requires precise on-site stroke tuning within a tight footprint.
Confirm your parameters: 20 mm bore, 75 mm maximum stroke, 75 mm adjustment window, M5x0.8 air port, male M6x1.0 rod thread, and no magnet. Remember that a plain SDAJ does not hold position or load when air is lost or the valve is centered—the fixed bumper only decelerates near the end of travel. For load holding without live pressure, integrate an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 0–75 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 SDAJ20X75-75B FAQ
The R (M6x1.0) screw mechanically shortens the extend end position by up to 75 mm, setting the stop between 0 and 75 mm. It is not a mid-stroke lock; the cylinder drifts if air is lost, so use an external rod lock for load holding.
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Covers non-human-caused product damage.
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Standard models are processed and dispatched in 3-5 business days.
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Related AirTAC SDAJ Cylinders
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