Airtac BSAID Clamp Cylinder BSAID40X900
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X900 is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 900mm stroke and a spring-applied, air-released clamp-lock that holds the rod at ANY position along its travel — with a static holding force of 900 N.
- BoreØ40 mm
- Stroke900 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM12×1.25
About the Airtac BSAID Clamp Cylinder BSAID40X900
The AirTAC BSAID40X900 is a double-acting ISO 15552 profile cylinder featuring a double-rod configuration and an integrated spring-applied, air-released clamp-lock. It provides a static holding force of 900 N, gripping the rod securely at any position along its 900 mm travel. Because it is a double-rod actuator, the thrust is equal in both directions at 528 N (0.5 MPa), making it ideal for assemblies requiring a rod out both ends. Buyers must distinguish between holding force and thrust: the 900 N clamp secures a static load, whereas the 528 N thrust drives the motion.
This enclasp mechanism is bidirectional and locks whether the rod was extending or retracting. A crucial design feature of the double-rod setup is enabling dual-side guidance: operators mount a workpiece on one end and a counterweight, position flag, or secondary tool on the opposite end to prevent rotation. The lock engages only after the piston stops, meaning it cannot brake a moving rod. Unlocking requires balanced air pressure on both sides of the piston via the dedicated G1/8 enclasp port, preventing abrupt rod jumps upon release.
Airtac BSAID Clamp Cylinder BSAID40X900 Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X900 |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 900 mm |
| Type | Double rod (BSAID), double acting |
| Cylinder port | G1/4 |
| Rod thread | M12×1.25 |
| Lock type | Spring-applied, air-released clamp (any position) |
|---|---|
| Static holding force | 900 N |
| Enclasp / unlock port | G1/8 |
| Operating pressure | 0.15 – 0.7 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Max stroke | Up to 800 mm |
Specifications follow the official AirTAC BSAI datasheet (ISO 15552). Operating pressure is 0.15–0.7 MPa (lower than a plain SAI). Port options: PT / G.
How the Clamp-Lock Holds
static holding force (Ø40 mm)
A spring-applied gripper clamps the rod and holds the load at any position in the stroke — not just at the stroke end (that is a SAIL) — and it is bidirectional: it holds whether the rod was extending or retracting.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
Equal force both directions (double rod). Rated to the 0.7 MPa operating maximum for this series. The clamp holding force (900 N) is separate from cylinder thrust. Size with a margin.
Where the Airtac BSAID Clamp Cylinder BSAID40X900 Is Used
Vertical Mid-Stroke Hold
Suspends elevated loads at any point along the 900 mm vertical travel using the 900 N clamp, preventing gravity-driven drops during air pressure loss.
Machining Position Freeze
Secures a dual-sided workpiece fixture rigidly in place for secondary machining operations, utilizing the double-rod design for equal push and pull rigidity.
Dual-Side Tooling Transfer
Drives a workpiece on one rod end while mounting a position flag on the opposite end, ensuring anti-rotation guidance over long strokes.
Is the Airtac BSAID Clamp Cylinder BSAID40X900 the Right Clamp-Lock?
Step down to a 32 mm bore if your load requires only 345 N of pull thrust and 600 N of holding force, or step up to a 50 mm bore if you need 825 N thrust and 1400 N of clamping capacity. Choose this BSAID clamp-lock over a stroke-end-only SAIL model when you must freeze the load mid-travel. If position holding is unnecessary, a plain SAID double-rod cylinder suffices. Because the 900 mm stroke exceeds the 800 mm standard maximum for a 40 mm bore, this is a non-standard stroke requiring an external guide to support the rod against side loads over such a long distance.
When specifying a replacement, match the double-rod layout, 40 mm bore, 900 mm stroke, and PT tapered ports. The 16 mm carbon steel rod and M12x1.25 thread offer robust side-load capacity, but external guidance remains essential here. The BSAID mounting set omits FB, CA, CB, and CR brackets, accepting only Basic, FA, LB, TC, TCM1, and TCM2. As no magnet is specified, position sensing via CMSE reed or DMSE electronic switches is not supported without modification. Always ensure pressures are balanced before unlocking the clamp.
Quick checklist
- ✓ Hold needed at any position?
- ✓ Or stroke-end only → use SAIL
- ✓ Holding force ≥ your load
- ✓ Balanced-pressure unlock circuit
- ✓ Extra safety measure for people
Airtac BSAID Clamp Cylinder BSAID40X900 FAQ
The integrated clamp-lock provides a static holding force of 900 N. Unlike a SAIL cylinder that only holds at stroke ends, this enclasp mechanism locks the rod at any position along the 900 mm travel, holding bidirectionally.
The spring-applied clamp engages only after the cylinder has stopped; it cannot brake a moving rod. To unlock it safely, air pressure must be balanced on both sides of the piston via the G1/8 enclasp port to prevent the rod from jumping. Safety-critical applications require an independent external safety measure.
Related AirTAC Lock & Standard Cylinders
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