Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40
The AirTAC Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40 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 35 to 75 mm on the machine — no shims, no part change.
- BoreØ63 mm
- Max stroke75 mm
- Adjustable range35–75 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 SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40
The AirTAC SDAJ63X75-40 is a compact double-acting single-rod cylinder featuring an external extend stop. An M16x1.5 adjuster screw lets you dial the forward end-position anywhere between 35 and 75 mm directly on the machine, avoiding part swaps during changeovers. Because the mechanism restricts travel rather than piston area, output matches a standard SDA at 1558.6 N push and 1401.5 N pull at 0.5 MPa.
Built with a short riveted body, this unit saves axial mounting depth where larger profile or round-body actuators will not fit. It uses a fixed NBR bumper to decelerate the stroke end, which is not an adjustable air cushion. Note this specific SKU lacks a piston magnet, so it cannot accept reed or electronic switches without upgrading to the -S variant.
Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40 Technical Specifications
| Model | Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40 |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Max stroke | 75 mm |
| Adjustable range | 35 – 75 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 40 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 SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×75 | Maximum stroke length in mm. |
| -40 | 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 SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40 Is Used
Press Fit Tuning
Dial the 35-75 mm extend stop to perfect insertion depth for varying bearing housings without swapping actuators on the assembly line.
Carton Flap Folding
Adjust the mechanical stop on the fly to accommodate different box heights, using the 1558.6 N push force to tuck flaps cleanly.
Vertical Lift Stops
Set precise upper travel limits for a 79.4 kg lift payload, relying on the fixed NBR bumper to absorb the end-of-stroke shock.
Is the Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40 the Right Cylinder?
When sizing this 63 mm bore, verify if the on-site tuning window of 40 mm suits your setup. If you step down to an SDAJ50, thrust drops to 981.7 N push at 0.5 MPa. Stepping up to an SDAJ80 raises push to 2513.3 N at 0.5 MPa. Based on the 0.5 MPa rating, a safe working load is roughly 935 N (about 60 percent of capacity), translating to a vertical lift of approximately 79.4 kg with a 2:1 safety margin.
This bore features a PT1/4 port and a 20 mm rod with a female M10x1.5 thread. Confirm your required extend length falls within 35-75 mm. Remember that a plain SDAJ does not hold position on air loss; 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 35–75 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 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 SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X75-40 FAQ
At 0.5 MPa it provides 1558.6 N push and 1401.5 N pull. At 0.7 MPa it provides 2182.1 N push and 1962.2 N pull. The theoretical maximum push is 318 kgf at 1.0 MPa.
The M16x1.5 screw shortens the extend stroke by up to 40 mm, yielding a 35-75 mm range. It acts as a mechanical stop, not a mid-stroke lock. The cylinder cannot hold a load on air loss; use an external rod lock for that.
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