Airtac BSED Clamping Double Acting Cylinder BSED80X125
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED80X125 combines a double-rod ISO 15552 cylinder — a Ø25mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 3600 N in either direction if air is lost. Ø80mm bore, 125mm stroke, PT3/8 ports, G1/8 lock-release.
- BoreØ80 mm
- Stroke125 mm
- Static holding force3600 N
- ConfigurationDouble rod + lock
- Cylinder portPT3/8
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED80X125
The AirTAC BSED80X125 is a double-acting, double-rod ISO 15552 profile cylinder featuring an integrated spring-applied, air-released rod lock. A rod exits both ends, delivering equal force in both directions—about 2268 N each way at 0.5 MPa. The rear rod can carry a flag or cam and resists rotation, making it ideal for symmetric tooling tasks.
For fail-safe security, the collet lock provides a bidirectional static holding force of 3600 N with no live air required. If pressure drops or an E-stop trips, the rod is held at position. The lock engages only after the rod stops and releases when both piston sides are pressure-balanced, requiring at least 0.5 seconds. This unit has no magnet, meaning position sensors are not supported on this SKU. The cylinder port is PT3/8, while the lock-release uses a separate G1/8 port.
Double Rod + 3600 N Rod Lock (Ø80mm)
A rod exits both ends for symmetric force and back-rod tooling, and a spring clamps the collet so the Airtac BSED Clamping Double Acting Cylinder BSED80X125 holds its position in both directions on air loss or E-stop. Apply 0.15–0.7 MPa to the G1/8 release port to unlock. Engage only after the rod has stopped (not a dynamic brake), and release only when both piston sides are pressure-balanced; allow ≥0.5 s for full release.
Airtac BSED Clamping Double Acting Cylinder BSED80X125 Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED80X125 |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø80 mm |
| Stroke | 125 mm |
| Static holding force | 3600 N |
| Cylinder port | PT3/8 |
| Lock-release port | G1/8 |
| Configuration | Double rod, double acting |
|---|---|
| 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 |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M20×1.5 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø80mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 2268 N |
| 0.7 MPa (max) | 3175 N |
| Max drive (@0.7 MPa) | 324 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 3600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED80X125
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 80 | Bore size in mm. |
| ×125 | Stroke length in mm. |
| -S | Optional built-in magnet for CMSE / DMSE sensor sensing. |
Thread: PT (blank) / G. Mounting (BSED): Basic, LB, FA, TC. Related: SED (double rod, no lock), BSE (single-rod rod lock). Sensors CMSE/DMSE fit magnetic BSED.
Where the Airtac BSED Clamping Double Acting Cylinder BSED80X125 Is Used
Vertical Lift Holding
Secures a 3000 N vertical workhead in place during air loss, utilizing the 3600 N fail-safe collet lock to prevent drops while the 3175 N both-way drive handles the lift.
Symmetric Transfer Station
Drives a dual-ended transfer carriage with equal 2268 N force in both directions, using the rear rod for an anti-rotation cam while the lock holds the load mid-stroke.
Mid-Stroke Machining Pause
Parks a clamping fixture at 125mm stroke for machining, engaging the spring-applied collet to resist 3600 N of cutting force without needing continuous live air.
Is the Airtac BSED Clamping Double Acting Cylinder BSED80X125 the Right Cylinder?
Select this 80mm bore model when your application requires both symmetric drive force and fail-safe holding up to 3600 N. It delivers 2268 N each way at 0.5 MPa (3175 N at 0.7 MPa, max 324 kgf). If your load is lighter, the 63mm bore offers 1402 N at 0.5 MPa with a 2200 N holding force. If you need more power, the 100mm bore provides 3681 N at 0.5 MPa and a 5500 N hold. Always verify your load does not exceed the 3600 N static limit.
Remember that the lock is not a dynamic brake; engage it only after the rod stops, and release it only when both piston sides are pressure-balanced (allow at least 0.5 seconds). For safety-rated or man-rated overhead loads, use appropriate safety-rated controls rather than relying solely on the collet. When replacing a unit, match the 80mm bore, 125mm stroke, PT3/8 port thread, and mounting choice (Basic, LB, FA, or TC).
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 3600 N?
- ✓ Back-rod space for tooling/flag
- ✓ Lock engaged only when stopped
- ✓ G1/8 release-air line available
Installation & Safety Notes
- check Engage the lock only after the rod has stopped — not 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 Support both rod ends; avoid side load.
- check Use BSED mounting (Basic/LB/FA/TC).
Airtac BSED Clamping Double Acting Cylinder BSED80X125 FAQ
The integrated spring-applied collet immediately clamps the rod, providing a bidirectional static holding force of 3600 N to maintain position. It is a fail-safe hold, not a dynamic brake, so it must be engaged only after the rod has stopped moving.
The BSED80X125 provides equal drive force in both directions: 2268 N at 0.5 MPa and 3175 N at 0.7 MPa, with a maximum drive of 324 kgf. The fail-safe rod lock provides a separate static holding force of 3600 N.
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