6061 Aluminium Alloy Sleeve

Overview

High-strength aluminium sleeves and bolts replace steel fasteners where mass reduction matters, using alloys and forming processes that reach strengths previously limited to steel. The design problem is not only strength: aluminium has a lower elastic modulus and a different galvanic position, so joint design, preload and coating all change compared with a steel fastener. This listing: material Aluminium alloy, tensile strength 600 MPa cold-headed 7-series, finish Anodised, weight comparison About 60% lighter than a steel part.

What sets this listing apart: Features Lightweight, for humanoid robots.

Advantages

Cold forming aligns grain flow with the load path, giving fatigue performance that machined aluminium cannot match.

Correct coating and isolation prevent the galvanic corrosion that otherwise appears when aluminium contacts steel in a humid environment.

Density at roughly one third of steel means a weight saving at every fastener location, which compounds across a large assembly.

Applications

Battery electric vehicle structures, robot arms where inertial mass affects dynamics, drone and UAV airframes, and portable equipment with a weight budget.

Aluminium joints lose preload faster than steel under thermal cycling because of the higher expansion coefficient: specify preload with a relaxation allowance, and isolate the fastener from steel mating parts.

Product information is supplied by Toprecision. Custom parts can be produced to drawing — contact us for samples or a quotation.