Airtac B01-SDAJ Special Cylinder B01-SDAJ40X25-20
The AirTAC Airtac B01-SDAJ Special Cylinder B01-SDAJ40X25-20 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 5 to 25 mm on the machine — no shims, no part change.
- BoreØ40 mm
- Max stroke25 mm
- Adjustable range5–25 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-SDAJ40X25-20
The B01-SDAJ40X25-20 is a double-acting compact riveted-body cylinder featuring an external adjustable extend stop. The leading "B01-" prefix marks this as an AirTAC application-dedicated (customer-specified) variant; mechanically, it is identical to the standard SDAJ40X25-20. Turning the M12x1.25 adjuster screw lets you dial the extend position down from the 25 mm maximum to a 5 mm minimum directly on the machine, eliminating shims or part swaps.
The short riveted body saves axial mounting depth where round-body or profile cylinders cannot fit. Force remains unchanged from a standard SDA of this bore, delivering about 628.3 N push at 0.5 MPa. End shock is handled by a fixed NBR bumper, which decelerates the stroke end but is not an adjustable air cushion.
Airtac B01-SDAJ Special Cylinder B01-SDAJ40X25-20 Technical Specifications
| Model | Airtac B01-SDAJ Special Cylinder B01-SDAJ40X25-20 |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø40 mm |
| Max stroke | 25 mm |
| Adjustable range | 5 – 25 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-SDAJ40X25-20
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 40 | Bore size in mm. |
| ×25 | 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-SDAJ40X25-20 Is Used
Trial Positioning Jigs
Dial the extend stop between 5 and 25 mm during prototype runs to find the exact clamping contact point without machining new spacers.
Changeover-Heavy Lines
Rapidly reconfigure the 628.3 N push stroke for different product sizes using the external R screw, cutting machine setup time between batches.
Vertical Lift Stops
Lift loads up to 32 kg with a 2:1 safety margin and fine-tune the descent end-point to prevent crushing delicate components at the bottom.
Is the Airtac B01-SDAJ Special Cylinder B01-SDAJ40X25-20 the Right Cylinder?
Sizing this 40 mm bore requires looking both ways: stepping down to an SDAJ32 yields 402.1 N push at 0.5 MPa, while stepping up to an SDAJ50 provides 981.7 N. Based on the 628.3 N figure, a safe working load is roughly 377 N (about 60 percent capacity), translating to a vertical lift of approximately 32 kg with a 2:1 margin. Choose this unit when you need on-site stroke tuning for changeovers.
Confirm the 40 mm bore, 25 mm stroke, 20 mm adjust window, PT1/8 port, and female M8x1.25 rod thread. Note that this SKU lacks a magnet, so it cannot take magnetic switches; specify the -S option if sensing is required. A plain cylinder does not hold a load on air loss or valve centring—the piston drifts and the bumper only decelerates near the end. For load holding without live pressure, install an external rod lock or pilot-operated check valve.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 5–25 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-SDAJ40X25-20 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 of 128 kgf at 1.0 MPa. It operates at 30-500 mm/s, accepts 0.15-1.0 MPa pressure, and functions in -20 to +70 C temperatures.
The M12x1.25 adjuster screw mechanically shortens the extend stop by up to 20 mm, giving a usable extend range of 5 to 25 mm. It sets the end position without changing the force, and it is not a mid-stroke lock. This B01- prefixed unit is a customer-specified variant that is mechanically identical to the SDAJ40X25-20.
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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.
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