Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20
The AirTAC Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20 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 70 to 90 mm on the machine — no shims, no part change.
- BoreØ63 mm
- Max stroke90 mm
- Adjustable range70–90 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 SDAJ63X90-20
The AirTAC SDAJ63X90-20 is a compact double-acting single-rod cylinder featuring an external adjustable extend stop. An M16x1.5 adjuster screw lets you dial the forward end-position anywhere between 70 and 90 mm directly on the machine, completely avoiding shims or part swaps. Because the mechanism only alters the mechanical stop, output force remains identical to a standard SDA of this bore, delivering 1558.6 N of push at 0.5 MPa.
Its short riveted body drastically cuts axial mounting depth where larger profile or round-body units fail to fit. Deceleration at the ends relies on a fixed NBR bumper rather than an adjustable air cushion. Note that this specific SKU lacks a piston magnet, so it cannot host reed or electronic switches without upgrading to the -S variant.
Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20 Technical Specifications
| Model | Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20 |
|---|---|
| Series | SDAJ compact adjustable-stroke cylinder |
| Bore size | Ø63 mm |
| Max stroke | 90 mm |
| Adjustable range | 70 – 90 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 SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20
| SDAJ | Compact double-acting cylinder with adjustable stroke. |
|---|---|
| 63 | Bore size in mm. |
| ×90 | 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 SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20 Is Used
Press Fit Depth Tuning
Dial the extend stop from 70 to 90 mm via the M16x1.5 screw to set precise pressing depths for 79.4 kg assemblies without changing cylinder bodies.
Variable Length Diverter
Adjust the stroke end on the fly to deflect different carton sizes on a packaging line, relying on the 1558.6 N push force to clear the belt.
Z-Axis Trial Positioning
Fine-tune the downward extend stop during prototype tooling setup, knowing the fixed NBR bumper will decelerate the 935 N safe working load at the end of travel.
Is the Airtac SDAJ50~63 Adjustable Ultra-Thin Cylinder SDAJ63X90-20 the Right Cylinder?
When sizing this 63 mm bore, compare its 1558.6 N push at 0.5 MPa against adjacent options. Stepping down to the SDAJ50 yields 981.7 N, whereas moving up to the SDAJ80 provides 2513.3 N. Based on the 0.5 MPa figure, a safe working load is roughly 935 N (about 60 percent capacity), translating to a vertical lift capability near 79.4 kg with a 2:1 safety margin.
This model is tailored for setups demanding frequent on-machine stroke tuning between 70 and 90 mm. Remember that a plain SDAJ will not hold a load if air pressure drops or the valve centers; the piston drifts and the fixed bumper only decelerates near the end of travel. For secure load holding without live pressure, integrate an external rod lock or a pilot-operated check valve. Confirm your bore, 20 mm window, PT1/4 port, female rod thread, and lack of magnet for this build.
Quick checklist
- ✓ Need on-machine stroke fine-tuning?
- ✓ Target position within 70–90 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 SDAJ63X90-20 FAQ
This 63 mm bore cylinder features a PT1/4 air port and delivers 1558.6 N push / 1401.5 N pull at 0.5 MPa, 2182.1 N push / 1962.2 N pull at 0.7 MPa, with a theoretical maximum of 318 kgf at 1.0 MPa.
Turning the external R (M16x1.5) screw mechanically shortens the extend stroke by up to 20 mm, giving a usable 70 to 90 mm range. It only sets the stop position and does not lock the piston; for load holding without air pressure, use an external rod lock.
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