Airtac BSED Clamping Double Acting Cylinder BSED125X175S
The AirTAC Airtac BSED Clamping Double Acting Cylinder BSED125X175S combines a double-rod ISO 15552 cylinder — a Ø32mm rod out BOTH ends for equal force both directions — with an integrated spring-applied, air-released ROD LOCK that holds up to 8600 N in either direction if air is lost. Ø125mm bore, 175mm stroke, PT1/2 ports, G1/8 lock-release.
- BoreØ125 mm
- Stroke175 mm
- Static holding force8600 N
- ConfigurationDouble rod + lock
- Cylinder portPT1/2
- Lock-release portG1/8
About the Airtac BSED Clamping Double Acting Cylinder BSED125X175S
The AirTAC BSED125X175S 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 5734 N each way at 0.5 MPa and 8028 N at 0.7 MPa. The extruded aluminum barrel carries no external tie rods, ensuring clean ISO 15552 dimensional interchangeability.
The fail-safe collet mechanism provides a massive 8600 N static holding force with zero live air required, instantly clamping the 32 mm rod if pressure drops. This unit is a locking device, not a dynamic brake; engage it only after the rod stops and release it only when both piston sides are pressure-balanced, allowing at least 0.5 seconds. The lock uses a separate G1/8 release port, while the main cylinder ports are PT1/2. Fitted with an -S magnet, it supports CMSE reed and DMSE electronic sensors for position feedback.
Double Rod + 8600 N Rod Lock (Ø125mm)
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 BSED125X175S 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 BSED125X175S Technical Specifications
| Model | Airtac BSED Clamping Double Acting Cylinder BSED125X175S |
|---|---|
| Series | BSED ISO 15552 double-rod rod-lock cylinder |
| Bore size | Ø125 mm |
| Stroke | 175 mm |
| Static holding force | 8600 N |
| Cylinder port | PT1/2 |
| 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 – 500 mm/s |
| Max stroke | Up to 1000 mm |
Specifications follow the official AirTAC BSED datasheet. Rod thread M27×2 both ends. Mounting (BSED): Basic, LB, FA, TC. Port options: PT (standard) / G (BSPP); lock-release port is G1/8.
Theoretical Output Force (Ø125mm)
| Pressure | Force (both directions) |
|---|---|
| 0.5 MPa | 5734 N |
| 0.7 MPa (max) | 8027 N |
| Max drive (@0.7 MPa) | 819 kgf |
A rod exits both ends, so force is equal on extend and retract. Drive force is separate from the 8600 N static lock holding force. Size with a safety margin.
Model Code: Airtac BSED Clamping Double Acting Cylinder BSED125X175S
| B | Rod-lock cylinder prefix. |
|---|---|
| SED | ISO 15552 double-rod double-acting body. |
| 125 | Bore size in mm. |
| ×175 | 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 BSED125X175S Is Used
Heavy Vertical Press
Holds an 8600 N vertical platen securely without live air during E-stops, while the double-rod design ensures equal 8028 N pressing and retraction force.
Large Mold Handling
Uses the rear rod for anti-rotation and fixed tooling mounting, transporting heavy molds with symmetric 5734 N drive force at 0.5 MPa.
Pallet Stop Gate
Locks a heavy pallet stop firmly in place using the spring-applied collet, preventing any drift when the 0.15-0.7 MPa air supply is removed.
Is the Airtac BSED Clamping Double Acting Cylinder BSED125X175S the Right Cylinder?
Select this 125 mm bore model when your application requires massive symmetric thrust and fail-safe holding. Verify your static load is at or below 8600 N. If you need less force, step down to the 100 mm bore, which yields 3681 N at 0.5 MPa and 5500 N holding force. As the largest standard bore, there is no larger neighbor; for extreme loads, evaluate mounting multiple units or custom guidance. The 175 mm stroke is well within standard limits, but for any stroke at or above 300 mm, add external guides to prevent side-load wear.
Always apply the safety rule: engage the lock only when motion has stopped, and release it only after pressure-balancing both piston sides to prevent sudden surges. When replacing a unit, match the 125 mm bore, 175 mm stroke, PT1/2 main port thread, M27x2 rod thread, and the -S magnet option. Choose from Basic, LB, FA, or TC mounting styles to suit your frame.
Quick checklist
- ✓ Need both symmetric force AND fail-safe hold?
- ✓ Load to hold ≤ 8600 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 BSED125X175S FAQ
The spring-applied collet immediately clamps the rod, providing a bidirectional static holding force of 8600 N with no live air. It is a fail-safe lock, not a dynamic brake, so it only engages after the rod stops. For overhead or man-rated loads, always use independent safety-rated controls.
The double-rod design provides equal force both ways: 5734 N at 0.5 MPa and 8028 N at 0.7 MPa (max 819 kgf). The static holding force of the lock is 8600 N. Operating pressure is 0.15-0.7 MPa, and the speed range is 30-500 mm/s.
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