Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X175-30
The AirTAC Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X175-30 is a genuine double-acting aluminum-barrel mini cylinder with a Ø63mm bore, a 175mm nominal stroke and a rear adjustable-stroke stopper — trim up to 30mm for a usable window of 145–175mm. Adjustable air cushion (both ends).
- BoreØ63 mm
- Stroke175 mm
- Adjustable145–175 mm
- Port sizeG1/4
- Acting typeDouble acting
- Rod threadM14×1.5
- CushionAdjustable air cushion (both ends)
About the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X175-30
The AirTAC MBLCJ63X175-30 is a double-acting single-rod mini cylinder featuring a rear stroke adjuster and an adjustable air cushion at both ends. The rear stopper trims up to 30 mm of travel, creating a usable stroke window of 145 to 175 mm. Driven through a G1/4 port, the Ø16 mm carbon-steel rod delivers 1558 N push and 1457 N pull force at 0.5 MPa, making it suitable for heavy-duty compact positioning tasks.
Unlike the base MBLJ which relies on a fixed rubber bumper, this model uses screw-tunable air cushioning to decelerate high kinetic energy near each end cover, protecting the assembly during fast cycles. The riveted aluminum barrel and grease-retaining piston seal ensure long-term lubrication. Note that this specific SKU is built without a magnet, meaning it cannot support CMSG, DMSG, or EMSG position sensors. The rear adjuster acts only as a travel stop and does not lock the load in place.
Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X175-30 Technical Specifications
| Model | Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X175-30 |
|---|---|
| Series | MBL aluminum-barrel mini round cylinder (adjustable stroke) |
| Bore size | Ø63 mm |
| Nominal stroke | 175 mm |
| Adjustable window | 145–175 mm (trim 30 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 MBLCJ63X175-30
| MBLCJ | MBLCJ aluminum-barrel adjustable-stroke mini cylinder with adjustable cushion. |
|---|---|
| 63 | Bore size in mm. |
| ×175 | 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 MBLCJ63X175-30 Is Used
Injection Mold Ejection
Delivering 1558 N of push force at 0.5 MPa, this cylinder ejects heavy molded plastic parts from press tools, using the 145-175 mm stroke window to precisely time the ejection length.
Pallet Indexer Stopping
The adjustable air cushion safely decelerates fast-moving pallets carrying heavy assemblies at the end of the 175 mm stroke, preventing harsh impacts that could damage the end covers.
Heavy Clamp Actuation
Ideal for securing thick metal workpieces in heavy-duty welding fixtures, where the 63 mm bore provides the necessary 318 kgf holding thrust and the rear stopper dials in the exact clamp depth.
Is the Airtac MBLCJ Adjustable Mini Cylinder MBLCJ63X175-30 the Right Cylinder?
Providing 318 kgf of maximum theoretical force at 1.0 MPa, this 63 mm bore cylinder handles heavy actuation. If your application requires less force, stepping down to the 50 mm bore yields 981 N push at 0.5 MPa, which may improve cycle times and reduce air consumption. If you need more power, the 63 mm is the largest available in this series, so exceeding its capacity requires exploring alternative ISO profiles.
When choosing between variants, remember that the MBLCJ provides superior end-cover protection via its adjustable air cushion compared to the fixed bumper on the MBLJ, while the MBLC offers fixed stroke lengths if rear adjustment is unnecessary. Neither the cushion nor the rear stopper acts as a load-holding brake; external locking mechanisms are required for position retention under load. Mounting is limited to Basic, FA (flange), or LB (foot) brackets, as this series lacks back-cover or SDB pivot options. The standard PT thread connects to the G1/4 port. Ensure external guides support the rod on this 175 mm stroke to prevent side-load bending.
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 MBLCJ63X175-30 FAQ
At 0.5 MPa operating pressure, this 63 mm bore cylinder provides 1558 N of push force and 1457 N of pull force. At 0.7 MPa, the push force increases to 2181 N. The maximum theoretical force is 318 kgf at 1.0 MPa.
The rear stroke adjuster is a mechanical travel stop that trims the rod extension from 145 to 175 mm, setting the exact end position. The adjustable air cushion is a separate pneumatic feature that controls deceleration speed near the end covers. Neither feature locks or holds the load in place.
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