Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø40mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 95–125mm. Adjustable air cushion (both ends).
- BoreØ40 mm
- Stroke125 mm
- Adjustable95–125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM12×1.25
- CushionAdjustable air cushion (both ends)
- 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 MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30
The AirTAC MBLCJ40X125-30 is a compact double-acting aluminum mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. It delivers 628 N of push force and 528 N of pull force at 0.5 MPa. The rear stopper allows you to trim up to 30 mm of travel, creating a usable stroke window of 95 to 125 mm. This 125 mm travel length is well-suited for mid-range indexing and robust part ejection on automated lines.
Unlike the fixed rubber bumper found on the MBLJ variant, the screw-tunable air cushions on this SKU allow you to dial in end-of-stroke deceleration for heavier moving loads, protecting the end covers from impact. The 16 mm carbon-steel rod features 20 um hard-chrome plating to resist scoring, while the riveted rolling-packed barrel ensures structural integrity. Note that this specific model lacks a built-in magnet (-S), meaning it cannot support CMSG, DMSG, or EMSG position sensors without a configuration change.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø40 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 95–125 mm (trim 30 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M12×1.25 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable air cushion (both ends) |
| Max standard stroke | Up to 500 mm |
The rear stopper sets the end position — it is a travel stop, not a lock. Overall length = A + 2 × stroke + adjustable stroke. MBLJ/MBLCJ mounting is Basic / FA / LB only (no SDB, no back-cover code). Thread options: PT / G / NPT.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
| Max (@1.0 MPa) | 128 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a margin.
Model Code: Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 40 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -30 | Adjustable-stroke amount (mm you can trim at the rear). |
| S | Optional built-in magnet for a CMSG/DMSG/EMSG sensor switch. |
Related: MBLJ (adjustable stroke, fixed bumper), MBL (fixed stroke), MBLD (double rod).
Where the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30 Is Used
Stator Winding Press
Provides 628 N of thrust at 0.5 MPa to seat copper windings into motor stators, using the 95-125 mm stroke window to accommodate varying stack heights.
Pallet Strapping Feed
Handles the rapid 125 mm extension to position strapping heads over heavy pallets, relying on the adjustable air cushion to brake the 16 mm rod smoothly without slamming.
Printed Circuit Board Ejector
Uses the 30 mm rear stroke adjustment to precisely set the ejection depth of populated PCBs from test fixtures, preventing over-travel damage to delicate components.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30 the Right Cylinder?
Choose this 40 mm bore when you need 628 N of thrust at 0.5 MPa. If your application is lighter, stepping down to the 32 mm bore yields 402 N of push force; if you need more power, stepping up to the 50 mm bore provides 981 N. Select the MBLCJ over the MBLJ when your moving mass requires tunable pneumatic deceleration rather than a fixed rubber bumper, or over the MBLC if you need to fine-tune the end position. The rear adjuster sets the travel end point, and the cushion governs deceleration speed—neither component acts as a mechanical lock to hold a load in place.
Mounting is limited to Basic, FA (flange), or LB (foot) styles; this series does not support SDB pivot mounts or back-cover attachments. The overall length extends by the adjustment dimension (A + 2 x stroke + adjust). This SKU uses a G1/4 port with PT threads and an M12x1.25 rod-end. To replace this cylinder exactly, match the 40 mm bore, 125 mm stroke, 30 mm adjust code, PT thread, and lack of an S magnet.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Adjustable window fits your end position
- ✓ Adjuster is a travel stop, not a lock
- ✓ Magnet (S) for sensors?
- ✓ Side load — add a guide on long strokes
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Set the rear stopper for the end position (a travel stop, not a lock).
- check Avoid side load; add an external guide on long strokes.
- check Mounting: Basic / FA flange / LB foot (no SDB, no back-cover code).
- check Installation by qualified personnel per AirTAC docs.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30 FAQ
At 0.5 MPa, this 40 mm bore cylinder provides 628 N of push force and 528 N of pull force. At 0.7 MPa, the push force increases to 880 N. The maximum theoretical force is 128 kgf at 1.0 MPa. The operating pressure range is 0.15 to 1.0 MPa.
This specific SKU lacks the -S code, meaning it has no built-in magnet and cannot accept CMSG, DMSG, or EMSG position sensors. The 30 mm rear mechanism is a travel stop that sets your 95-125 mm usable window, and the adjustable air cushion controls end-of-stroke deceleration; neither feature mechanically locks or holds the rod in place.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC Adjustable-Stroke Cylinders
Request a Quote for Airtac MBLCJ Adjustable Mini Cylinder MBLCJ40X125-30
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.