How to put a blade in a safety razor safely

April 05, 2017

How to put a blade in a safety razor

Inserting a new blade in a safety razor or replacing an old DE blade is very simple.  The entire process only takes a few seconds to change out the blade.  Just remember that double edge blades are razor sharp on two sides and easy to cut yourself if not careful. 

How often should you change your safety razor blade

is a common question we get asked.  The answer is it all depends on many factors.  The short and sweet answer is between 3-5 shaves. Sure it can last much longer and you can also change it after each shave if you wish, however this is a very generic guideline that holds true across most blades.

There are several types of safety razors including single edge razors, double edge razors with either adjustable or 3 piece design.  We will use our 3 piece safety razor from Sir Hare to demonstrate the process.

3 piece safety razors are made up of a handle and a 2 piece head, hence the name.  Technically the blade is the 4th component.  The blade gets sandwiched between the top head and bottom head with a handle screwed on the bottom.

The nice thing about a 3 piece razor is they are very easy to take apart, have no mechanisms to break, and provide easy access to all the nooks and crannies to make them easy to clean.

How to put a blade in a safety razor

Inserting a new blade or replacing an old one is very simple.  You'll want to grip the head with one hand while holding the handle in the other.  Using a counter clockwise motion twist off the handle and place it on the counter.  Use both hands to separate the head paying careful attention to the blade and the sharp edges.  

Make sure you notice the way the head fits together because it is possible to put it on incorrectly and the razor will not function correctly.

Replace the old blade and sandwich a new one back between the two pieces of the head.  Screw the handle back on and viola you're all done.  

Don't throw the used blade in the garbage.  You can make a DIY blade bank or buy one for a few bucks.  Checkout our article on How to dispose of de razor blades to make sure you are not putting others at danger with careless disposal.

Quick Reference

  1. Hold the head of the razor between your index finger and thumb.  Make sure you grip the razor on the sides where no razor blade is exposed.
  2. With your other hand twist the handle counter-clockwise until unscrewed from the head
  3. Gently separate the head while paying attention to how it is assembled.  It is possible to put it back together incorrectly.
  4. Remove old razor blade and replace with new blade
  5. Put head back together the same way it came apart
  6. Screw the handle back on the head, careful not to over-tighten



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