Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20S
The AirTAC Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20S 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-SDAJ40X40-20S
The B01-SDAJ40X40-20S is an AirTAC compact double-acting single-rod cylinder featuring an external adjustable extend stop. The leading "B01-" prefix designates this as an application-dedicated (customer-specified) variant of the base SDAJ40X40-20S, meaning it is mechanically identical to the standard model but grouped for specific customer builds. A built-in piston magnet (-S) enables position sensing with AirTAC reed or electronic switches.
By turning the M12x1.25 adjuster screw, you can dial the extend stroke anywhere between 20 and 40 mm directly on the machine without shims or part changes. The adjuster sets the mechanical stop position, not the piston area, so force remains equal to a standard SDA of this bore: about 628.3 N push at 0.5 MPa. The short riveted body saves axial mounting depth where round-body or profile cylinders will not fit, and a fixed NBR bumper decelerates the stroke end rather than acting as an adjustable air cushion.
Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20S Technical Specifications
| Model | Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20S |
|---|---|
| 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-SDAJ40X40-20S
| 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-SDAJ40X40-20S Is Used
Trial Positioning
Dial the extend stop from 20 to 40 mm during prototype tooling setups to find the exact clamping depth for a 32 kg vertical lift without machining new spacers.
Changeover Lines
Rapidly reconfigure the extend end position on packaging lines running mixed product heights, leveraging the 628.3 N push at 0.5 MPa to handle varied actuation demands.
Shallow Footprint Assembly
Install the short riveted body in tight axial spaces to push parts against a stop, relying on the fixed NBR bumper to absorb end shock at standard cycle speeds.
Is the Airtac B01-SDAJ Special Cylinder B01-SDAJ40X40-20S the Right Cylinder?
When sizing this 40 mm bore, evaluate both neighbours. Stepping down to an SDAJ32 yields 402.1 N push at 0.5 MPa, whereas stepping up to an SDAJ50 provides 981.7 N. This model delivers 628.3 N push at 0.5 MPa, translating to a safe working load of roughly 377 N (about 60 percent of capacity) or a vertical lift of approximately 32 kg with a 2:1 margin. Choose this unit when your fixture requires frequent on-machine stroke tuning between 20 and 40 mm.
Confirm the bore, 40 mm stroke, 20 mm window, PT1/8 port, built-in magnet (S), and female M8x1.25 rod-end thread match your design. Note that a plain cylinder does not hold its load on air loss or when the valve is centred; the piston drifts and the fixed bumper only decelerates near the end. For secure load holding without live pressure, integrate an external rod lock or a pilot-operated check valve.
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-SDAJ40X40-20S FAQ
This 40 mm bore double-acting 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 push of 128 kgf at 1.0 MPa.
The B01- prefix marks this as an application-dedicated variant of the SDAJ40X40-20S, mechanically identical to the base model. The M12x1.25 screw shortens the extend stop by up to 20 mm, giving a usable range of 20 to 40 mm; it sets the stop position and does not alter force or lock mid-stroke.
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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.
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