Wonderful SF-M10

Modular transtibial and transfemoral builds use a foot bolt assembly at the connection between foot and adapter.

Foot changes during rehabilitation involve removing and refitting this fastener, which makes replacement practice worth establishing.

Wet-use limbs place the bolt in a position exposed to water, grit and salt, so material and any corrosion resistance matter.

High-activity users load the fastener cyclically at a high step count, which is where torque and locking practice bear on service life.

Heavier users require the material and rating to be matched, since weight ratings differ substantially between aluminium, stainless steel and titanium assemblies.

Clinics holding component stock benefit from bolts held against the feet and adapters they routinely fit.

Services carrying out repairs and refits need the correct torque figure and any specified locking compound to hand.

The Whole Load Path in One Fitting

The assembly forms the single fastened connection between foot and pylon, which is why its specification is worth settling precisely.

Load Spread by the Dished Washer

The curved plate seats in the foot's recess and distributes clamping force across the foot material rather than concentrating it.

Angular Tolerance at the Joint

The dished seating allows a small amount of angular accommodation between the foot and the adapter face.

Clamping Force Set by Torque

A specified tightening figure gives repeatable clamping, with under- and over-tightening both avoided.

Engagement Protected by Minimum Length

Manufacturers publish a minimum permissible length so thread engagement remains sufficient, and it is established before fitting.

Material Matched to Patient Weight

Weight ratings differ substantially between aluminium, stainless steel and titanium, so the two are specified together.

Resistance to Loosening Under Cycling

Where a lock washer or thread locking compound is specified, it addresses the cyclic loading the joint carries.

Compatibility Checked Both Ways

The recess geometry in the foot and the thread in the adapter must both match, and both are confirmed before order.

Replacement Practice Established

Whether the bolt is treated as single-use on refitting is confirmed rather than assumed.

Specification Taken From the Instructions

Torque, length and rating are obtained for this item rather than borrowed from comparable parts.

Supply and Documentation Arranged

Medigear.uk can arrange supply, documentation and the provision of consumables.

Foot Attachment Bolt Assembly

For joining a prosthetic foot to the adapter and pylon in a modular limb.

Item Reference: SF-M10

To be confirmed against the manufacturer's marking and packaging.

Manufacturer

Wonderful Rehabilitation, to be confirmed at quotation.

Thread: M10

Per the reference designation, with pitch to be confirmed.

Dished Washer Plate

Seating into the foot recess, spreading load and allowing angular tolerance.

Flat Washer

Bearing against the adapter face.

Lock Washer

Inclusion to be confirmed at quotation.

Bolt Length

Confirmed at quotation.

Minimum Permissible Length

Confirmed at quotation, governing thread engagement.

Bolt Material

Confirmed at quotation, as it determines the weight rating.

Maximum Patient Weight

Confirmed at quotation against the instructions for use.

Tightening Torque

Confirmed at quotation from the manufacturer's instructions.

Thread Locking Compound

Requirement confirmed at quotation.

Compatible Feet and Adapters

Confirmed at quotation, covering recess geometry and thread.

Required Thread Engagement

Confirmed at quotation.

Replacement and Single-Use Status

Confirmed at quotation.

UKCA or CE Marking and Declaration of Conformity

Issued by the manufacturer and requested from the seller at quotation.

Instructions for Use

Provided by the seller at quotation, and required before fitting.

Warranty Terms

Set by the seller at quotation.

The SF-M10 is a foot attachment bolt assembly for modular lower limb prostheses. In a modular limb the load path runs from socket through knee or adaptor, down the pylon and into the foot, and at the bottom of that chain sits a single threaded fastener carrying axial load through stance, bending as the foot lever acts about the ankle, and cyclic loading at a high step count, in the wettest and dirtiest position on the limb. The assembly does that through three parts: a bolt providing clamping force, a dished washer plate seating in the foot's recess to spread load and allow angular tolerance, and a flat washer bearing on the adapter face. Four figures decide whether the joint is sound, being thread size and pitch, length and the thread engagement it gives, material and the patient weight it supports, and tightening torque. None is published for this reference, and because a fastener is exactly the component where a borrowed figure should not be relied on, all four must come from this item's own instructions for use. Selection, torque and verification are the work of the prescribing prosthetist. Those figures, with compatibility and replacement practice, are provided by the seller at quotation alongside UKCA or CE documentation. Medigear.uk lists the assembly for UK business buyers and can arrange supply, documentation and the provision of consumables. Enquire for a written quotation.