Airtac BSED Clamping Double Acting Cylinder BSED50X125S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED50X125S combines a double-rod ISO 15552 cylinder — a Ø20mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 1400 N in either direction if air is lost. Ø50mm bore, 125mm stroke, PT1/4 ports, G1/8 lock-release.
- BoreØ50 mm
- Stroke125 mm
- Static holding force1400 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/4
- Lock-release portG1/8
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSED Clamping Double Acting Cylinder BSED50X125S
The AirTAC BSED50X125S 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 drive force of 825 N each way at 0.5 MPa, while the fail-safe collet provides a 1400 N static holding force.
This 50 mm bore unit uses a PT1/4 cylinder port and a separate G1/8 lock-release port. The -S magnet option supports CMSE reed and DMSE electronic sensors. The lock engages only after the rod stops and requires pressure balance for safe release.
Double Rod + 1400 N Rod Lock (Ø50mm)
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 BSED50X125S 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 BSED50X125S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED50X125S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø50 mm |
| Stroke | 125 mm |
| Static holding force | 1400 N |
| Cylinder port | PT1/4 |
| 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 M16×1.5 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø50mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 825 N |
| 0.7 MPa (max) | 1155 N |
| Max drive (@0.7 MPa) | 118 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 1400 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED50X125S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 50 | 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 BSED50X125S Is Used
Mid-Force Machining Jigs
Clamps workpieces with 825 N of equal both-way force, using the 1400 N fail-safe lock to hold position securely during sudden air pressure drops.
Vertical Lift Stops
Raises and lowers loads with symmetric force, relying on the spring-applied collet to arrest vertical drift up to 1400 N when air is removed.
Anti-Rotation Indexing
Uses the dual exiting rods to prevent rotation during transfer, engaging the 1400 N static hold to stabilize the payload at rest.
Is the Airtac BSED Clamping Double Acting Cylinder BSED50X125S the Right Cylinder?
Choose this 50 mm bore when you need symmetric both-way force and a 1400 N fail-safe hold. If your load is lighter, the 40 mm bore offers 528 N at 0.5 MPa and 900 N holding force. If heavier, step up to the 63 mm bore for 1402 N at 0.5 MPa and 2200 N holding. Always verify your load is within 1400 N.
Engage the lock only after the rod stops, and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds. For this 125 mm stroke, ensure adequate guidance to prevent side-load wear. Replacement requires matching the 50 mm bore, 125 mm stroke, PT thread, and -S magnet.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 1400 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 BSED50X125S FAQ
The drive force is equal both ways at 825 N @0.5 MPa and 1154 N @0.7 MPa, with a max drive of 118 kgf. The static fail-safe holding force of the lock is 1400 N with no live air.
The spring-applied collet clamps the rod automatically when air is lost, holding up to 1400 N. To release, apply pressure to the G1/8 release port only after both piston sides are pressure-balanced, allowing at least 0.5 seconds.
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