AirTAC BSAI125 Rod-Lock ISO Cylinder, 125 mm Bore
Every AirTAC BSAI125 configuration on one page: 44 stock order codes with strokes from 25 to 1000 mm, magnet versions, from $681.13. Pick a stroke and version to see the exact order code and price.
Basic (no mounting)
This combination is not a stock order code. Request a quote and we will confirm availability and price.
- 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 BSAI125
The AirTAC BSAI125 is a double-acting rod-lock ISO 15552 cylinder with a 125 mm bore and a 32 mm piston rod. At 0.5 MPa it pushes 6136 N and pulls 5734 N; at 0.7 MPa that rises to 8590 N push and 8027 N pull. Force depends on bore and pressure only, so every stroke on this page gives the same output.
All BSAI125 versions share 1/2" air ports, an M27×2 rod thread and 40 mm adjustable air cushions. The cylinder runs on filtered air between 0.15 and 0.7 MPa (proof 1.5 MPa), from -20 to +70 °C, at 30 to 500 mm/s. This page lists 44 stock order codes with strokes from 25 to 1000 mm; catalog standard strokes run up to 1000 mm.
The BSAI125 is the SAI ISO 15552 cylinder with a compact clamping unit built in. Springs apply clamp plates to the piston rod and air releases them, so the rod can be locked at any point of the stroke, in either direction and whether it is extended or retracted. Static holding force at this bore is 8600 N. The clamp has its own G1/8 port and releases at 0.15 to 0.7 MPa; it can also be released by hand. The holding force is a static rating: stop the rod first, then clamp it.
BSAI125 Technical Specifications
| Bore size | Ø125 mm |
|---|---|
| Stock strokes | 25 – 1000 mm |
| Catalog standard stroke | up to 1000 mm (longer on request) |
| Acting type | Double acting, with rod lock |
| Static holding force | 8600 N |
| Rod lock | Spring applied, air released (G1/8 port, 0.15 – 0.7 MPa); manual release |
| Port size | 1/2" (PT standard) |
| Piston rod / rod thread | Ø32 mm / M27×2 |
| Fluid | Air (filtered by 40 µm element) |
|---|---|
| Operating pressure | 0.15 – 0.7 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 500 mm/s |
| Cushion | Adjustable, 40 mm |
Source: AirTAC Products Catalog 2026A (PDF01-P0381), BSAI specifications and ordering code; body as SAI.
Theoretical output force (Ø125 mm)
| Pressure | Push | Pull |
|---|---|---|
| 0.5 MPa | 6136 N | 5734 N |
| 0.7 MPa | 8590 N | 8027 N |
Push = pressure × bore area; pull subtracts the Ø32 mm rod area. Usable force is lower because of friction and back-pressure.
How the BSAI125 Order Code Is Built
| B | Rod-lock (clamp) cylinder |
|---|---|
| SAI | Series: SAI ISO 15552 cylinder |
| 125 | Bore in mm |
| X100 | Stroke in mm |
| S | Built-in magnet for position sensors (blank = none) |
| - | Mounting: basic only |
| G | Port thread: G = G (BSPP), blank = PT |
All AirTAC BSAI125 Order Codes (44)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Stroke (mm) | Mounting | Magnet · Thread | Price | Select |
|---|---|---|---|---|---|
| BSAI125X25 | 25 mm | Basic (no mounting) | - · PT | $681.13 | |
| BSAI125X25S | 25 mm | Basic (no mounting) | S · PT | $687.17 | |
| BSAI125X50 | 50 mm | Basic (no mounting) | - · PT | $687.43 | |
| BSAI125X50S | 50 mm | Basic (no mounting) | S · PT | $693.48 | |
| BSAI125X75 | 75 mm | Basic (no mounting) | - · PT | $693.48 | |
| BSAI125X75S | 75 mm | Basic (no mounting) | S · PT | $699.53 | |
| BSAI125X80 | 80 mm | Basic (no mounting) | - · PT | $699.74 | |
| BSAI125X80S | 80 mm | Basic (no mounting) | S · PT | $705.79 | |
| BSAI125X100 | 100 mm | Basic (no mounting) | - · PT | $699.74 | |
| BSAI125X100S | 100 mm | Basic (no mounting) | S · PT | $705.79 | |
| BSAI125X125 | 125 mm | Basic (no mounting) | - · PT | $706.72 | |
| BSAI125X125S | 125 mm | Basic (no mounting) | S · PT | $712.77 | |
| BSAI125X150 | 150 mm | Basic (no mounting) | - · PT | $713.96 | |
| BSAI125X150S | 150 mm | Basic (no mounting) | S · PT | $720.00 | |
| BSAI125X160 | 160 mm | Basic (no mounting) | - · PT | $721.14 | |
| BSAI125X160S | 160 mm | Basic (no mounting) | S · PT | $727.19 | |
| BSAI125X175 | 175 mm | Basic (no mounting) | - · PT | $721.14 | |
| BSAI125X175S | 175 mm | Basic (no mounting) | S · PT | $727.19 | |
| BSAI125X200 | 200 mm | Basic (no mounting) | - · PT | $727.19 | |
| BSAI125X200S | 200 mm | Basic (no mounting) | S · PT | $733.24 | |
| BSAI125X225 | 225 mm | Basic (no mounting) | - · PT | $734.43 | |
| BSAI125X225S | 225 mm | Basic (no mounting) | S · PT | $740.48 | |
| BSAI125X250 | 250 mm | Basic (no mounting) | - · PT | $741.61 | |
| BSAI125X250S | 250 mm | Basic (no mounting) | S · PT | $747.66 | |
| BSAI125X300 | 300 mm | Basic (no mounting) | - · PT | $754.90 | |
| BSAI125X300S | 300 mm | Basic (no mounting) | S · PT | $760.95 | |
| BSAI125X350 | 350 mm | Basic (no mounting) | - · PT | $769.32 | |
| BSAI125X350S | 350 mm | Basic (no mounting) | S · PT | $775.37 | |
| BSAI125X400 | 400 mm | Basic (no mounting) | - · PT | $782.56 | |
| BSAI125X400S | 400 mm | Basic (no mounting) | S · PT | $788.61 | |
| BSAI125X450 | 450 mm | Basic (no mounting) | - · PT | $796.98 | |
| BSAI125X450S | 450 mm | Basic (no mounting) | S · PT | $803.03 | |
| BSAI125X500 | 500 mm | Basic (no mounting) | - · PT | $810.27 | |
| BSAI125X500S | 500 mm | Basic (no mounting) | S · PT | $816.32 | |
| BSAI125X600 | 600 mm | Basic (no mounting) | - · PT | $838.86 | |
| BSAI125X600S | 600 mm | Basic (no mounting) | S · PT | $844.91 | |
| BSAI125X700 | 700 mm | Basic (no mounting) | - · PT | $867.50 | |
| BSAI125X700S | 700 mm | Basic (no mounting) | S · PT | $873.55 | |
| BSAI125X800 | 800 mm | Basic (no mounting) | - · PT | $896.09 | |
| BSAI125X800S | 800 mm | Basic (no mounting) | S · PT | $902.14 | |
| BSAI125X900 | 900 mm | Basic (no mounting) | - · PT | $924.93 | |
| BSAI125X900S | 900 mm | Basic (no mounting) | S · PT | $930.98 | |
| BSAI125X1000 | 1000 mm | Basic (no mounting) | - · PT | $953.57 | |
| BSAI125X1000S | 1000 mm | Basic (no mounting) | S · PT | $959.62 |
Need a combination that is not listed? Request a quote.
Where the BSAI125 Is Used
High-force actuation
Over 6.1 kN at 0.5 MPa for presses, lifting tables and dampers.
Intermediate stops
Clamp the rod at any point of the stroke and hold it there while the machine works.
Holding when air is lost
The spring-applied clamp keeps the rod in place when the release port is exhausted.
Choosing the Right BSAI125 Configuration
Start with the stroke. Pick the exact travel your machine needs; a longer stroke adds length, weight and air consumption without adding force. If your length is not listed, request a quote and we will confirm whether it can be built.
Every code on this page is the basic version without a mounting code: the cylinder is fixed through its own mounting holes.
The clamping unit is the same on every code of this page (8600 N static holding force). Finally pick the version: S adds a magnet for position sensors.
AirTAC BSAI125 FAQ
The catalog static holding force for Ø125 mm is 8600 N. It is a static rating, so stop the rod before the clamp engages; the lock holds in both directions at any stroke position.
Supply 0.15 to 0.7 MPa to the clamp's G1/8 port; with the port exhausted the springs keep the rod clamped. A manual release is also provided.
No. Every BSAI125 gives about 6136 N push and 5734 N pull at 0.5 MPa, whatever the stroke.
1/2" ports, PT thread as standard.
Every code on this page is the basic version without a mounting code; the cylinder is fixed through its own mounting holes.
Usually yes. Request a quote with the stroke, mounting and version and we will confirm whether it can be built, plus price and lead time.
0.15 to 0.7 MPa operating pressure (proof 1.5 MPa) and -20 to +70 °C on filtered air.
No. You can order a single BSAI125. Orders are processed and handed to the carrier within 3-5 business days.
Buying the BSAI125 from AirtacDistr
Genuine AirTAC parts
Every order code on this page is the AirTAC factory part number. Specifications follow the AirTAC Products Catalog 2026A. About us
Ready in 3-5 business days
That is our time to process the order and hand it to the carrier. No minimum order: a single piece can be ordered.
14-day returns, 1-year warranty
Return within 14 days of delivery; the buyer pays return shipping. The warranty covers defects not caused by misuse. Return policy
Engineering help
Send your application details and we will confirm the right order code, usually within 7-8 hours. Ask us
Page data checked against the live catalog on 2026-11-10.
Request a Quote for the BSAI125
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.