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40mm Keyed Aluminum Split Lock Collar for Go-Kart Racing Axles
40mm Keyed Aluminum Split Lock Collar
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40mm Keyed Aluminum Split Lock Collar for Go-Kart Racing Axles

Part Number: KMLC40
Online Price: $11.99
40mm Aluminum Split Lock Collar – Keyed 2-Piece Racing Kart Axle Collar
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Description

40mm Aluminum Split Lock Collar – Keyed 2-Piece Racing Kart Axle Collar


The 40mm Aluminum Split Lock Collar is a lightweight, precision-machined axle collar designed specifically for 40mm racing go-kart axles used on sprint kart chassis. Its two-piece split design allows the collar to be installed or removed without disassembling the rear axle, making it an ideal solution for kart builders and racers who frequently adjust axle components.


Manufactured from CNC-machined aluminum, this collar combines low weight with secure clamping. The dual-bolt design distributes clamping force around the axle to provide reliable positioning without unnecessarily damaging or distorting the axle.


A 6mm keyed slot provides positive engagement with keyed kart axles and helps prevent the collar from rotating under load.


Designed for 40mm Sprint Kart Axles

This 40mm axle collar is commonly used on sprint racing go-karts and competition kart chassis equipped with 40mm rear axles. It can be used in several locations along the rear axle to control component position, lateral movement, and axle spacing.


Common Racing Kart Applications

Axle Bearing Positioning
Install the collar against the inside or outside of an axle bearing to help control axle movement and maintain proper bearing position.


Rear Wheel Hub Positioning
Used inside or adjacent to rear wheel hubs, the collar can help control hub location and axle movement while providing another method of tuning rear axle support and chassis behavior.


Brake Hub & Sprocket Carrier Spacing
Use the collar to establish and maintain component spacing around brake hubs, sprocket carriers, and other keyed rear axle components.


Axle Positioning & Chassis Setup
The split collar provides an easy way to establish repeatable axle-component locations during chassis setup and maintenance.


Key Features

  • 40mm Inside Diameter – Designed for common 40mm racing kart axles
  • 6mm Keyway – Compatible with 6mm keyed axle applications
  • Two-Piece Split Design – Installs without removing the rear axle
  • Dual-Bolt Clamp – Provides secure and even clamping force
  • CNC-Machined Aluminum – Lightweight construction for racing applications
  • Approx. 60mm Outside Diameter – Compact design for common kart applications
  • Corrosion Resistant – Aluminum construction won't rust
  • Reusable Design – Easily removed and repositioned for chassis setup changes
  • Sprint Kart Compatible – Designed around common 40mm sprint racing kart axles


Specifications

Specification

Details

Inside Diameter

40mm

Outside Diameter

Approximately 60mm

Keyway

6mm

Material

CNC-Machined Aluminum

Design

2-Piece Split Collar

Clamping

Dual-Bolt

Application

40mm Racing Kart Axles

Why Use a Split Axle Collar?

A traditional one-piece collar requires the axle to be removed before the collar can be installed or repositioned. The two-piece split design eliminates that step, allowing racers to make axle-component adjustments without completely disassembling the rear axle.

The dual-bolt clamping system also provides more consistent clamping around the axle than a single-point set-screw design, making it a better choice for applications where secure component positioning is important.


Ideal For Racing Go-Karts

This 40mm split collar is ideal for:

  • Sprint racing go-karts
  • Competition kart chassis
  • 40mm rear axle systems
  • Kart axle bearing positioning
  • Rear wheel hub spacing
  • Brake hub positioning
  • Sprocket carrier spacing
  • Kart chassis setup and tuning
  • Performance karting applications
  • Racing mower and other 40mm axle applications


Fitment Note

This collar is designed for 40mm axles with a 6mm keyway. Always measure your axle diameter and verify the keyway dimensions before ordering. Axle diameter, key size, and component clearance can vary between manufacturers and chassis.

FAQ

What size axle does this collar fit?

This split lock collar is designed for 40mm racing kart axles with a compatible 6mm keyway.


What type of go-karts is this collar designed for?

It is primarily designed for sprint racing go-karts using 40mm rear axles. It can also be used on other racing chassis and applications that use a compatible 40mm keyed axle.


What is the purpose of an axle lock collar?

An axle collar helps position and control components on the rear axle. Depending on where it is installed, it can help control axle movement, establish component spacing, and maintain the position of bearings, wheel hubs, brake hubs, or sprocket carriers.


Where can I use this 40mm axle collar?

Common applications include:

  • Rear axle bearing positioning
  • Wheel hub positioning
  • Brake hub spacing
  • Sprocket carrier spacing
  • Axle lateral movement control
  • Rear axle chassis setup


Does the collar have a keyway?

Yes. The collar features a 6mm keyway designed for use with compatible keyed 40mm kart axles.


Is this collar a one-piece or two-piece design?

It is a two-piece split design. The two halves clamp around the axle using two bolts.


Can I install the collar without removing the axle?

Yes. One of the primary advantages of the split design is that it can be installed, removed, or repositioned without removing the rear axle from the kart.


Why use a split collar instead of a set-screw collar?

The two-piece design provides clamping force around the axle rather than relying on a single set screw. This provides secure positioning while reducing the potential for localized damage to the axle surface.


Is the collar made from aluminum?

Yes. The collar is CNC-machined from aluminum to provide a lightweight solution suitable for racing applications.


What is the outside diameter?

The outside diameter is approximately 60mm.


Can this collar be used next to axle bearings?

Yes. It can be positioned against an axle bearing to help establish and maintain the desired bearing or axle position.


Can I use it for brake and sprocket carrier positioning?

Yes. The collar can be used to establish spacing and help maintain the position of brake hubs, sprocket carriers, and other keyed rear-axle components.


Can this collar be used to tune kart handling?

It can be part of a rear axle setup by controlling component position and axle movement. However, it is primarily a positioning and locking component rather than a dedicated chassis tuning component.


Will this collar fit any 40mm axle?

Not necessarily. The axle must have a 40mm diameter and compatible 6mm keyway. Always verify your axle dimensions before ordering.


What should I measure before ordering?

Verify:

  • Axle diameter: 40mm
  • Keyway width: 6mm
  • Available clearance around the collar
  • Location and spacing of the component where the collar will be installed


Is this collar suitable for racing?

Yes. It is designed specifically for racing kart applications where lightweight construction, secure axle positioning, and easy adjustability are important.


Can the collar be reused?

Yes. The two-piece aluminum design allows the collar to be removed and repositioned as needed for chassis maintenance or setup changes.

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