Airtac BSAID Clamp Cylinder BSAID40X800S
The AirTAC Airtac BSAID Clamp Cylinder BSAID40X800S is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 800mm 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
- Stroke800 mm
- Cylinder portG1/4
- TypeDouble rod (BSAID)
- Enclasp portG1/8
- Rod threadM12×1.25
About the Airtac BSAID Clamp Cylinder BSAID40X800S
The AirTAC BSAID40X800-S is a double-acting ISO 15552 profile cylinder featuring a double-rod design and an integrated spring-applied, air-released clamp-lock. It secures the load at any position along its 800mm travel with a static holding force of 900 N. Because it is a double-rod unit, the thrust is equal in both directions at 528 N (0.5 MPa), and the extending rod from the rear cap allows dual-side guidance or mounting a counterweight and a position flag on the opposite end. A critical distinction exists between holding force and thrust: the 900 N clamp grip is entirely separate from the 528 N pneumatic thrust, so you must size the clamp's holding capacity against the static load, not the cylinder's pushing power.
The enclasp mechanism requires a third G1/8 pneumatic port to release the grip, operating within a balanced pressure range of 0.15-0.7 MPa. Remember that the variable air cushions only decelerate the piston near the stroke ends; the mechanical clamp is the sole device holding the load. The included -S magnet works seamlessly with AirTAC CMSE reed and DMSE solid-state sensors for position feedback. Furthermore, the clamp locks only after the rod has stopped moving and cannot function as an emergency brake.
Airtac BSAID Clamp Cylinder BSAID40X800S Technical Specifications
| Model | Airtac BSAID Clamp Cylinder BSAID40X800S |
|---|---|
| Series | BSAI ISO 15552 clamp-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 800 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 BSAID40X800S Is Used
Vertical Load Suspension
Holds a 900 N vertical load at any point in the 800mm stroke without continuous air pressure, preventing sudden drops during power loss.
Machining Position Hold
Secures a dual-sided workpiece fixture firmly in place for intermediate machining or inspection processes along the travel path.
Dual-Side Tooling Carrier
Uses the second rod end to mount a counterweight or position flag while maintaining equal 528 N force during clamping operations.
Is the Airtac BSAID Clamp Cylinder BSAID40X800S the Right Clamp-Lock?
Choose this 40mm bore model when you need to suspend a load mid-stroke without maintaining live air pressure, stepping up from a 32mm bore (345 N thrust, 600 N hold) if you need greater bidirectional pulling power. A plain SAID cylinder suffices if you only need equal thrust and do not require intermediate holding, while a SAIL unit only grips at the stroke ends. The BSAID40X800-S excels by locking anywhere along the 800mm travel. For replacements, match the double-rod format, 40mm bore, 800mm stroke, PT port threads, and the -S magnet. The double-rod mounting set omits FB, CA, CB, and CR brackets, accepting only Basic, FA, LB, TC, TCM1, and TCM2. The 16mm carbon steel rod with an M12x1.25 thread handles side loads well, but at 800mm of travel, an external guide is strongly recommended to prevent binding. Always ensure pressures are balanced before unlocking to prevent the rod from jumping abruptly, and add independent safety measures for human-safety applications.
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 BSAID40X800S FAQ
The clamp-lock provides a static holding force of 900 N at any position. Because it is a double-rod cylinder, the pneumatic thrust is equal in both directions at 528 N (0.5 MPa). The holding force and thrust are separate values, so size the clamp against your static load.
The spring-applied clamp locks the rod only after it has stopped moving; it cannot brake a moving load. To unlock it safely, you must apply 0.15-0.7 MPa to the G1/8 enclasp port with balanced pressures on both sides of the piston, or the rod may jump abruptly. Add independent safety measures for human-safety applications.
Related AirTAC Lock & Standard Cylinders
Request a Quote for Airtac BSAID Clamp Cylinder BSAID40X800S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.