Airtac STA Single Acting Compact Guided Cylinder STA63X20B
The AirTAC Airtac STA Single Acting Compact Guided Cylinder STA63X20B is a genuine single-acting COMPACT cylinder (single acting, pull type) with a Ø63mm bore and 20mm stroke. Air pulles the rod and an internal spring returns it, so one solenoid line drives the motion — ideal for short-stroke clamping and ejection in tight spaces.
- BoreØ63 mm
- Stroke20 mm
- Port sizePT1/4
- Acting typeSingle acting, pull type
- Rod threadM10×1.5 (F) / M18×1.5 (B)
- CushionFixed NBR bumper
About the Airtac STA Single Acting Compact Guided Cylinder STA63X20B
The AirTAC STA63X20B is a compact single-acting pull-type cylinder where compressed air retracts the rod and an internal spring extends it back out. It delivers a robust 1225.5 N net pull at 0.5 MPa, scaling to 1786.2 N at 0.7 MPa. This makes it highly effective for heavy-duty tensioning and pulling tasks requiring significant force.
Designed with space efficiency in mind, the short riveted body saves axial mounting depth where a standard round-body or profile cylinder would simply not fit. This specific SKU includes a male M18x1.5 piston rod thread for direct load attachment and operates at speeds between 50-500 mm/s. It relies on a fixed NBR bumper to decelerate the stroke end rather than an adjustable air cushion.
Airtac STA Single Acting Compact Guided Cylinder STA63X20B Technical Specifications
| Model | Airtac STA Single Acting Compact Guided Cylinder STA63X20B |
|---|---|
| Series | STA compact single-acting cylinder |
| Bore size | Ø63 mm |
| Stroke | 20 mm |
| Acting type | Single acting, pull type |
| Port size | PT1/4 |
| Rod end thread | M10×1.5 female / M18×1.5 male (B) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.2 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 50 – 500 mm/s |
| Cushion | Fixed NBR bumper |
| Max standard stroke | Up to 30 mm |
Specifications follow the official AirTAC SDA-family datasheet. Single-acting types start at 0.2 MPa (the spring must be overcome). Confirm against the product label before installation.
Net Output Force (Ø63mm, Pull)
| Pressure | Pull force (net) |
|---|---|
| 0.5 MPa | 1226 N |
| 0.7 MPa | 1786 N |
These are NET output forces — the return-spring force is already deducted. Single-acting pull only; the spring performs the opposite stroke. Size with a safety margin.
Model Code: Airtac STA Single Acting Compact Guided Cylinder STA63X20B
| STA | Compact single acting, pull type cylinder series. |
|---|---|
| 63 | Bore size in mm. |
| ×20 | Stroke length in mm (single-acting max 30 mm). |
| S | Built-in magnet for magnetic-switch sensing (omit = none). |
| B | Male-thread piston rod (omit = female thread). |
Thread: PT standard. SSA pushes out / spring returns; STA pulls in / spring extends. Related: SDA (double acting), SDAD (double rod), SDAJ (adjustable stroke).
Where the Airtac STA Single Acting Compact Guided Cylinder STA63X20B Is Used
Heavy Tensioning
Pulls heavy cables or straps with a 1225.5 N net force at 0.5 MPa, retracting the load when air is applied.
Gate Return Mechanism
Holds a 62.5 kg vertical load closed against gravity using a 2:1 safety margin before releasing.
Industrial Clamping
Secures large fabricated components by pulling them into place, relying on the fixed NBR bumper for shock absorption.
Is the Airtac STA Single Acting Compact Guided Cylinder STA63X20B the Right Cylinder?
When sizing this model, compare its 1225.5 N net pull at 0.5 MPa against the neighboring STA50 bore, which provides 717.7 N at the same pressure. If the smaller bore is insufficient for your load, the 63 mm version offers a substantial upgrade in pulling capacity. Remember that the standard stroke ceiling for this series is 30 mm, so the 20 mm stroke here fits well within the normal range.
Because this is a spring-extend design, the STA63X20B does not hold a mid-stroke load on air loss; the spring drives the rod to its extended rest position. You must apply at least 0.2 MPa of operating pressure to overcome the return spring. Please confirm your bore, stroke, PT1/4 port, and the male M18x1.5 rod thread (indicated by the B option) match your mounting requirements. Note that this unit lacks the S magnet option and cannot accept magnetic switches.
Quick checklist
- ✓ Net pull force at your working pressure
- ✓ Stroke ≤ 30 mm (single-acting limit)
- ✓ Single air line saves a valve/port
- ✓ Magnet (S) for sensors?
- ✓ Female (blank) or male (B) rod thread
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.2 – 1.0 MPa operating pressure.
- check Remember the spring performs the return stroke.
- check Avoid side load on the short piston rod.
- check Front/rear covers are riveted — do not dismantle.
- check Installation by qualified personnel per AirTAC docs.
Airtac STA Single Acting Compact Guided Cylinder STA63X20B FAQ
The net pull force is 1225.5 N at 0.5 MPa and 1786.2 N at 0.7 MPa. These figures already account for the internal return spring, giving you the true working output.
No, this specific SKU does not include the S option for a piston magnet, so it cannot accept reed or electronic switches. You would need the -S variant for position sensing.
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