MAV 1261

Product catalog summary

Overview: The MAV 1261 Standard Series locking assemblies are designed for medium capacity applications, offering self-centering and self-locking features with a fixed axial hub position during tightening. The assemblies utilize a single taper design and zinc-plated rings, requiring oil-free and dry lubrication for rings, shaft, and hub bore, while screws are oiled.

Specifications: The assemblies feature slotted inner and outer rings with integrated push-off threads and a set of socket head cap screws, grade 12.9. Tolerances for the shaft and hub bore are ±0.08 mm, with a surface finish requirement of Ra < 3.2 µm.

Applications: These assemblies serve as an alternative to hex nut keyless bushings, providing the force typically generated by large nuts through a smaller quantity of screws. This design eliminates the need for large wrenches and simplifies installation.

Performance Data: The document includes a detailed table listing dimensions, screw sizes, tightening torque (Ma), transmissible torque (Mt), axial load (Fax), and contact pressures (Ps and Ph) for various sizes. For example, a 40 mm x 67 mm assembly has a tightening torque of 974 Nm and can handle a transmissible torque of 60 Nm with a contact pressure of 36 MPa in the hub bore.

Key Parameters: The assemblies are available in various sizes, with dimensions ranging from 15 mm to 50.80 mm in diameter. The contact pressures and axial loads vary depending on the specific size and configuration, ensuring suitability for a range of mechanical applications.

Catalog excerpts

Medium capacity Self-centering, self-locking Fixed axial hub position during tightening Single taper design Zinc plated rings LUBRICATION. Rings, shaft, hub bore: OIL-FREE and DRY. Screws: OILED Tolerances: shaft ±0.08 mm; hub bore ±0.08 mm Surface ﬁnish of shaft and hub bore Ra < 3.2 µm Slotted inner ring, with integrated push-off threads Application examples inner ring screws LOCKING ASSEMBLIES Set of socket head cap screws, grade 12.9 outer ring

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This series is used as an alternative to the hex nut keyless bushings. The force generated by large nut is provided by small quantity of screws, which eliminates the need of large and expensive wrenches and allows easier installation. Fax: transmissible axial load with Mt=O Nm Ma: screws tightening torque Ps: contact pressure on shaft

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