Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-75
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-75 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 75mm for a usable window of 50–125mm. Adjustable air cushion (both ends).
- BoreØ63 mm
- Stroke125 mm
- Adjustable50–125 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 MBLCJ63X125-75
The AirTAC MBLCJ63X125-75 is a double-acting, single-rod mini cylinder engineered for heavy-duty compact automation. It features a rear travel stopper that allows you to trim up to 75 mm of rearward movement, creating a usable stroke window of 50 to 125 mm. Driven by a Ø16 mm carbon-steel rod with 20 µm hard-chrome plating, it generates 1558 N of push force at 0.5 MPa and 2181 N at 0.7 MPa. The riveted aluminum barrel keeps weight down in tight machine spaces, while the heterogeneous two-way grease-retaining piston seal maintains lubrication for speeds up to 800 mm/s.
Unlike the base MBLJ which relies on a fixed rubber bumper, this MBLCJ incorporates a screw-tunable adjustable air cushion at both ends. This allows you to dial in end-of-stroke deceleration for heavy 318 kgf loads, protecting the end covers from impact. The rear stopper sets the travel end position; it is not a lock and cannot hold a load without live air. Note that this specific SKU lacks a built-in magnet, meaning it cannot support CMSG, DMSG, or EMSG position sensors.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-75 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-75 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø63 mm |
| Nominal stroke | 125 mm |
| Adjustable window | 50–125 mm (trim 75 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 MBLCJ63X125-75
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 63 | Bore size in mm. |
| ×125 | Nominal stroke length in mm. |
| -75 | 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 MBLCJ63X125-75 Is Used
Injection Mold Ejection
Provides 1558 N of push force at 0.5 MPa to eject dense plastic parts, using the 75 mm rear adjuster to dial in the exact return position without repositioning the whole mold plate.
Heavy Conveyor Diverting
Tunes the dual-end air cushions to smoothly brake the 2181 N extension force at 0.7 MPa when kicking heavy automotive components off a high-speed packaging line.
Sheet Metal Press Feeding
Pushes stamping blanks into a servo press using the 50-125 mm usable stroke window, relying on the hard-chrome plated Ø16 mm rod to resist deflection during the feed cycle.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X125-75 the Right Cylinder?
If 1558 N at 0.5 MPa is too much force, stepping down to the 50 mm bore yields 981 N of push, while moving up is impossible as 63 mm is the largest in this mini series. Choose this MBLCJ over the MBLJ when your moving mass requires tunable pneumatic deceleration rather than a fixed bumper, or over the MBLC if you need to fine-tune the end position within that 50-125 mm window. Remember that neither the rear stopper nor the air cushion acts as a lock; external guide rods must manage side loads, and a separate holding mechanism is required if the rod must resist drift under load.
This cylinder is limited to Basic, FA, or LB mounting footprints—no SDB pivot or back-cover options exist. Its overall length is calculated as A + 2 x stroke + adjust, so the 75 mm rear adjuster significantly extends the tail. The G1/4 port and M14x1.5 rod-end thread are fixed by the 63 mm bore. A direct replacement requires matching the 63 mm bore, 125 mm stroke, 75 mm adjust code, PT thread, and the absence of the -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 MBLCJ63X125-75 FAQ
At 0.5 MPa it delivers 1558 N push and 1457 N pull. At 0.7 MPa it delivers 2181 N push. The maximum theoretical force is 318 kgf at 1.0 MPa, with a proof pressure of 1.5 MPa.
This specific SKU lacks the -S magnet, so it cannot mount AirTAC CMSG, DMSG, or EMSG sensors. The 75 mm code means the rear stopper lets you trim the stroke from 125 mm down to 50 mm; this sets the travel end position, while the adjustable air cushion handles deceleration. Neither holds the load.
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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