Airtac BSE Clamp Standard Cylinder BSE40X300S
The AirTAC Airtac BSE Clamp Standard Cylinder BSE40X300S is a genuine double-acting ISO 15552 cylinder with an integrated spring-applied, air-released ROD LOCK. If air is cut or an E-stop is hit, the collet clamps the Ø16mm rod and holds up to 900 N in either direction — no drift. Ø40mm bore, 300mm stroke, PT1/4 cylinder ports, G1/8 lock-release port.
- BoreØ40 mm
- Stroke300 mm
- Static holding force900 N
- Lock typeSpring-lock / air-release
- Cylinder portPT1/4
- Lock-release portG1/8
About the Airtac BSE Clamp Standard Cylinder BSE40X300S
The AirTAC BSE40X300S is a double-acting, single-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. It supplies 628 N of push force at 0.5 MPa, while the collet mechanism delivers a 900 N bidirectional static holding force with zero live air required. Operating pressure is capped at 0.7 MPa.
This 40 mm bore, 300 mm stroke unit uses a PT1/4 cylinder port and a dedicated G1/8 release port. The integrated -S magnet supports CMSE reed and DMSE electronic sensors for precise position detection. Engage the lock only after the piston stops, and allow at least 0.5 s for full release before resuming motion.
Rod Lock — 900 N Static Holding (Ø40mm)
A spring clamps the collet onto the rod, so the Airtac BSE Clamp Standard Cylinder BSE40X300S holds its position in both directions when air is lost, exhausted or an E-stop trips. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage the lock only after the rod has stopped (it is not a dynamic brake), and release only when the pressures on both sides of the piston are balanced. Allow at least 0.5 s for full release before moving.
Airtac BSE Clamp Standard Cylinder BSE40X300S Technical Specifications
| Model | Airtac BSE Clamp Standard Cylinder BSE40X300S |
|---|---|
| Series | BSE ISO 15552 rod-lock cylinder |
| Bore size | Ø40 mm |
| Stroke | 300 mm |
| Static holding force | 900 N |
| Cylinder port | PT1/4 |
| Lock-release port | G1/8 |
| Rod thread | M12×1.25 |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Unlocking pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 30 mm |
| Max stroke | Up to 800 mm |
Specifications follow the official AirTAC BSE datasheet. The lock uses the SE standard body; SE mounting accessories fit BSE except FTC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa (max) | 880 N | — |
| Max drive (@0.7 MPa) | 90 kgf | |
Drive force is separate from the 900 N static holding force of the lock. BSE operates up to 0.7 MPa. Size with a safety margin.
Model Code: Airtac BSE Clamp Standard Cylinder BSE40X300S
| B | Rod-lock cylinder prefix. |
|---|---|
| SE | ISO 15552 standard double-acting body. |
| 40 | Bore size in mm. |
| ×300 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSE): Basic, LB, FA, FB, CA, CB, CR, TC (FTC is not available on BSE). Related: SE (no lock), BSED (double-rod rod lock). Sensors CMSE/DMSE fit magnetic BSE.
Where the Airtac BSE Clamp Standard Cylinder BSE40X300S Is Used
Vertical Pneumatic Lifts
Secures a 90 kgf vertical lifting stage instantly on air loss, using the 900 N collet to prevent uncontrolled drops.
Tooling Clamp Hold
Maintains clamping pressure on machined parts during E-stop events, holding position without consuming compressed air.
Pallet Stop Gate
Locks a 300 mm stroke stop gate firmly in the extended position, absorbing conveyor impacts while waiting for release.
Is the Airtac BSE Clamp Standard Cylinder BSE40X300S the Right Cylinder?
Verify your suspended load requires 900 N or less of holding force. If you need less drive, the 32 mm bore offers 402 N push at 0.5 MPa and 600 N holding force. Stepping up to the 50 mm bore provides 982 N push at 0.5 MPa and 1400 N holding force. At 300 mm of stroke, add an external guide to prevent side-load wear on the seals. For replacements, match the 40 mm bore, 300 mm stroke, PT thread, and -S magnet. SE mounting accessories fit this body except FTC.
Quick checklist
- ✓ Load to hold ≤ 900 N?
- ✓ Fail-safe hold on air loss / E-stop needed
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
- ✓ Magnet (-S) for CMSE/DMSE sensors?
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not as a dynamic brake.
- check Release only when both piston sides are pressure-balanced.
- check Allow ≥0.5 s for full release before commanding motion.
- check Feed the G1/8 release port with 0.15–0.7 MPa clean air.
- check Add safety-rated controls for man-rated / overhead loads.
- check Use SE mounting accessories (FTC excepted).
Airtac BSE Clamp Standard Cylinder BSE40X300S FAQ
The spring-applied collet delivers a 900 N static holding force in both directions without live air. Drive forces are 628 N push and 528 N pull at 0.5 MPa, 879 N push at 0.7 MPa, and a maximum 90 kgf drive at 0.7 MPa.
You must balance the air pressure on both sides of the piston first. Then supply air to the G1/8 release port at 0.15-0.7 MPa, and wait at least 0.5 seconds before commanding motion to ensure the collet fully retracts.
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