Airtac B01-SDAJ Special Cylinder B01-SDAJ63X85-20S
The AirTAC Airtac B01-SDAJ Special Cylinder B01-SDAJ63X85-20S is a genuine double-acting COMPACT cylinder (Ø63mm bore) whose extend end-position is set by an external M16×1.5 adjustment screw. You can dial the stroke anywhere from 65 to 85 mm on the machine — no shims, no part change.
- BoreØ63 mm
- Max stroke85 mm
- Adjustable range65–85 mm
- Adjuster threadM16×1.5
- Port sizePT1/4
- 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-SDAJ63X85-20S
The B01-SDAJ63X85-20S is a double-acting compact cylinder featuring an external adjustable extend stop. The B01- prefix marks this as an application-dedicated, customer-specified variant of the base SDAJ63X85-20S; mechanically, every physical spec is identical. Turning the R (M16x1.5) adjuster screw lets you dial the extend position anywhere between 65 and 85 mm directly on the machine, eliminating the need for shims or part changes. Retract remains full length.
Because the adjuster sets the mechanical stop rather than altering the piston area, output force equals a standard SDA of this bore, delivering 1558.6 N push at 0.5 MPa. The short riveted body saves axial mounting depth where round-body or profile cylinders will not fit. End-of-stroke deceleration is handled by a fixed NBR bumper, not an adjustable air cushion. The integrated -S magnet supports AirTAC reed or electronic switches for position sensing.
Airtac B01-SDAJ Special Cylinder B01-SDAJ63X85-20S Technical Specifications
| Model | Airtac B01-SDAJ Special Cylinder B01-SDAJ63X85-20S |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Max stroke | 85 mm |
| Adjustable range | 65 – 85 mm |
| Adjuster thread (R) | M16×1.5 |
| Port size | PT1/4 |
| Acting type | Double acting |
|---|---|
| Rod end thread | M10×1.5 F / M18×1.5 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1402 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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-SDAJ63X85-20S
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×85 | 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-SDAJ63X85-20S Is Used
Trial Positioning Jigs
Dial in the exact 65-85 mm extend stop during prototype runs without swapping parts, leveraging the 1558.6 N push to seat heavy components firmly.
Changeover Diverters
Quickly re-tune the stroke length for different product sizes on a packaging line, using the M16x1.5 adjuster to hit precise stopping points.
Vertical Lift Stops
Safely lift loads up to 79.4 kg with a 2:1 margin, setting the exact extend position while relying on external check valves for load holding.
Is the Airtac B01-SDAJ Special Cylinder B01-SDAJ63X85-20S the Right Cylinder?
When sizing this 63 mm bore, evaluate both neighbours. Dropping down to an SDAJ50 yields 981.7 N push at 0.5 MPa, whereas stepping up to an SDAJ80 provides 2513.3 N. This model offers a safe working load of roughly 935 N (about 60% of its 1558.6 N capacity) and can vertically lift approximately 79.4 kg with a 2:1 safety margin. Choose this bore if your setup requires on-machine stroke tuning within the 65-85 mm window.
Confirm the bore, 85 mm maximum stroke, 20 mm adjust window, and PT1/4 port. The -S code indicates the built-in magnet, and the female M10x1.5 rod-end thread mates with your tooling. Remember that a plain cylinder does not hold its load on air loss or when the valve is centred; the fixed bumper only decelerates near the end. For 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 65–85 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 M16×1.5 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-SDAJ63X85-20S FAQ
The B01- prefix designates an application-dedicated variant of the SDAJ63X85-20S, sharing identical specs. It delivers 1558.6 N push and 1401.5 N pull at 0.5 MPa, 2182.1 N push and 1962.2 N pull at 0.7 MPa, with a theoretical max of 318 kgf at 1.0 MPa. The piston rod is Ø20 mm, the port is PT1/4, and it operates at 30-500 mm/s.
The external R (M16x1.5) screw shortens the extend stroke by up to 20 mm, allowing you to set the stop anywhere between 65 and 85 mm on-site. The integrated -S magnet works with AirTAC reed or electronic switches for position sensing. The screw acts only as a mechanical stop and does not alter the cylinder's force.
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Standard models are processed and dispatched in 3-5 business days.
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