How To Repair A Damaged Shaft Using Machining Techniques

Shafts are commonly found in various industrial applications where rotational motion is required to transmit power or perform specific functions. These essential components can suffer issues such as wear and tear from vibration, rubbing, abrasive contaminants, and corrosion.

In situations where it is impractical to strip a shaft, Belzona metallic polymers can repair in-situ, limiting the downtime and lost production costs without the risks that result from welding procedures.

A step-by-step how-to guide:

00:00 - Introduction
00:21 - Undercutting the substrate by a minimum of 0.06 inches (approx. 1.6mm)
00:31 - Machining a rough thread profile to achieve a clean, rough bare metal
01:00 - Degreasing the prepared surface using Belzona 9111 or any other approved cleaner/degreaser
01:12 - Applying 6-8 wraps of tape to both sides of the repair area to act as a thickness gauge
01:52 - Using Belzona 1111 (Super Metal) – a two-part repair composite
02:07 - Mixing ratio by volume: 3 parts base to 1 part solidifier
02:17 - Mixing thoroughly until a uniform, streak-free color is achieved
02:30 - Applying Belzona 1111, forcing it down into the surface using a brush to avoid air entrapment
03:06 - Removing excess product and smoothing out the surface
03:26 - Removing the tape
03:48 - Allowing the product to fully cure
03:53 - Machining the repair down to within 0.005 inches (125 microns) of the desired profile
04:32 - Removing the final 0.002 inches (50-75 microns) using fine emery cloth

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