Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-50S
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-50S is a genuine double-acting aluminum-barrel mini cylinder with a Ø63mm bore, a 125mm nominal stroke and a rear adjustable-stroke stopper — trim up to 50mm for a usable window of 75–125mm. Adjustable air cushion (both ends).
- BoreØ63 mm
- Stroke125 mm
- Adjustable75–125 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- 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 MBLCJ63X125-50S
The AirTAC MBLCJ63X125-50S is a compact double-acting mini cylinder featuring a rear travel stopper that yields a usable stroke window of 75-125 mm. It generates 1558 N of push force at 0.5 MPa, making it well suited for moving heavy jigs or pressing assemblies within automated cells. A built-in magnet (-S) enables position detection across its 125 mm travel.
This SKU distinguishes itself from the fixed-bumper MBLJ by incorporating a screw-tunable air cushion at both ends, absorbing kinetic energy to prevent end-cover damage during high-speed transit. The rear stopper sets the end position but does not lock the load; you must maintain live air to hold position. Furthermore, the riveted aluminum barrel and 20 um hard-chrome plated carbon-steel rod deliver structural integrity without relying on heavy ISO 15552 profiles.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-50S Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-50S |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø63 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 75–125 mm (trim 50 mm) |
| Acting type | Double acting |
| Port size | G1/4 |
| Rod thread | M14×1.5 |
| 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 (Ø63mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 1559 N | 1458 N |
| 0.7 MPa | 2182 N | — |
| Max (@1.0 MPa) | 318 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 MBLCJ63X125-50S
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -50 | 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 MBLCJ63X125-50S Is Used
Servo Press Dampening
Tune the end cushion to decelerate a 1558 N stamping head, preventing shock loads on precision servo press bearings.
Pallet Stopper Adjustment
Trim the rear stopper from 125 mm down to 75 mm to accommodate varying conveyor pallet lengths without swapping hardware.
Injection Mold Ejection
Leverages the -S magnet and DMSG electronic switch to confirm ejection of heavy 318 kgf max-rated molded parts before the press closes.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-50S the Right Cylinder?
If your payload requires less force, the 50 mm bore offers 981 N push at 0.5 MPa, whereas stepping up is not possible as 63 mm is the largest MBL diameter. Compared to the MBLC (fixed stroke), this model lets you dial in the 75-125 mm travel window on-site, while the adjustable cushion damps heavy 1558 N impacts. Remember that neither the cushion nor the stopper acts as a mechanical lock.
Mounting is restricted to Basic, FA, or LB styles, as the riveted body omits SDB or back-cover pivot options. The exact replacement match is a 63 mm bore, 125 mm stroke, 50 mm adjust code, G1/4 port, PT thread, and an S magnet. For this 125 mm stroke, use an external guide to prevent side-load bending on the Ø16 mm rod.
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 MBLCJ63X125-50S FAQ
At 0.5 MPa it provides 1558 N push and 1457 N pull. At 0.7 MPa the push increases to 2181 N. The absolute maximum theoretical force is 318 kgf at 1.0 MPa.
The rear stopper physically limits rod travel, giving you a usable 75-125 mm window, but it will not hold the load without air pressure. The air cushion only regulates deceleration speed near the covers to absorb impact; neither feature acts as a mechanical lock.
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.
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