Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20
The AirTAC Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20 is a genuine double-acting COMPACT cylinder (Ø40mm bore) whose extend end-position is set by an external M12×1.25 adjustment screw. You can dial the stroke anywhere from 20 to 40 mm on the machine — no shims, no part change.
- BoreØ40 mm
- Max stroke40 mm
- Adjustable range20–40 mm
- Adjuster threadM12×1.25
- Port sizePT1/8
- 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 B01-SDAJ Special Cylinder B01-SDAJ40X40-20
The AirTAC B01-SDAJ40X40-20 is a compact double-acting single-rod cylinder featuring an external extend stop. The B01- prefix designates an application-dedicated variant of the base SDAJ40X40-20, remaining mechanically identical. Its M12x1.25 adjuster screw lets you dial the extend position anywhere between 20 and 40 mm directly on the machine, eliminating the need for shims or part swaps.
The short riveted body saves valuable axial mounting depth where round-body or profile cylinders cannot fit. Force equals a standard SDA of this bore, delivering 628.3 N push at 0.5 MPa, because the adjuster sets the mechanical stop rather than altering the piston area. End shock is handled by a fixed NBR bumper, which decelerates the stroke end but is not an adjustable air cushion. Note this SKU lacks a piston magnet and cannot accept reed or electronic switches.
Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20 Technical Specifications
| Model | Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20 |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Max stroke | 40 mm |
| Adjustable range | 20 – 40 mm |
| Adjuster thread (R) | M12×1.25 |
| Port size | PT1/8 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M8×1.25 F / M14×1.5 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 (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 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 B01-SDAJ Special Cylinder B01-SDAJ40X40-20
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 40 | Bore size in mm. |
| ×40 | 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 B01-SDAJ Special Cylinder B01-SDAJ40X40-20 Is Used
Changeover-Heavy Machining
Dial the extend stop from 20 to 40 mm during fixture changeovers to accommodate different part widths without machining new spacers.
Trial Carton Sealing
Fine-tune the 628.3 N push stroke on-site to perfectly crush and seal varying box flap thicknesses without overcompressing the contents.
Vertical Lift Stops
Set a precise lower mechanical stop for a 32 kg vertical lift, ensuring the payload rests purely on the hard stop rather than relying on air pressure.
Is the Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20 the Right Cylinder?
Size both ways against this 40 mm bore. Dropping down to SDAJ32 yields 402.1 N push at 0.5 MPa, whereas stepping up to SDAJ50 provides 981.7 N. This model provides a safe working load around 377 N (about 60 percent of its 628.3 N capacity) and can vertically lift roughly 32 kg with a 2:1 margin. Choose this unit if your fixture requires frequent on-site stroke tuning or rapid changeovers. Confirm your required extend window of 20-40 mm, the PT1/8 port, and the female M8x1.25 rod-end thread.
A plain cylinder does not hold its load when air is lost or the valve is centred; the piston drifts and the fixed bumper only decelerates near the end of travel. For load holding without live pressure, integrate an external rod lock or a pilot-operated check valve. Since this specific SKU has no magnet, position sensing is unavailable unless you select the -S variant.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 20–40 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 M12×1.25 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 B01-SDAJ Special Cylinder B01-SDAJ40X40-20 FAQ
This 40 mm bore cylinder delivers 628.3 N push and 527.8 N pull at 0.5 MPa, 879.6 N push and 738.9 N pull at 0.7 MPa, with a theoretical maximum of 128 kgf at 1.0 MPa. It operates at 30-500 mm/s, uses a PT1/8 port, and the B01- prefix simply marks it as an application-dedicated variant of the base SDAJ40X40-20.
Turning the M12x1.25 R screw shortens the extend stroke by up to 20 mm, allowing you to set the stop anywhere between 20 and 40 mm. The screw is strictly a mechanical stop and does not alter force. The cylinder cannot hold a load on air loss; use an external rod lock or pilot-operated check valve for load holding.
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1-Year Warranty
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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Most inquiries answered within 7-8 hours.
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