How often does a blade drive need replacing?
The blade drive should be one of the most frequently changed parts in most clippers. They do wear down faster than you might think.
Blade drives by different brands, and different models by the same brand, will wear at different rates. Clipper manufacturers normally recommend professional groomers change the blade drive from monthly to quarterly, depending on use.
A worn blade drive causes a number of common issues, such as reduced blade performance, leaving blade lines (also known as track marks, leaves behind lines in the dogs coat). It may also make your blades seem dull even when they aren’t. If you have a spare set of clippers, it can be a good idea to test the blade on other clippers to determine if the blade or the clipper is the issue, before replacing the blade drive.
This is quite a broad guideline as varying factors like frequency of use, coat type, coat condition, cleaning, blade and clipper maintenance, can all impact the speed a blade drive will wear down.
The turning lever is the part that needs to be replaced most often. And different clipper models have different turning lever. The guides above still apply to the Heiniger turning lever, however you can also see a difference in the turning lever when it has worn down. The turning lever is the small, black plastic piece that sits near the top of your clipper, above the blade hinge. When the blade lever is new, it is a square shape, like the photo below:
When it has worn down, the edges will become rounded. If you notice your Hieniger clipper has a turning lever with rounded edges, it's time to replace the turning lever.
The blade hinge usually only needs to be replaced if the hinge closes often after removing a blade, if the latch is loose, or if the hinge has broken. When checking the hinge, check if yours still contain these two springs below: