What are Reamers?
Reamers, known as bridge, construction, or car reamers, are essential tools used in various industries for aligning existing holes before the installation of bolts or rivets. These reamers have a tapered point that allows them to easily enter overlapping holes, ensuring precise alignment. They also can be used just to enlarge holes.
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How Do Reamers Work?
Reamers, like drill bits come in several sizes. Unlike drill bits their tapered shaft design cuts as it aligns and enlarges holes. Drill bits do all their cutting at their tip, reamers cut along their whole tapered shaft. They are commonly used with portable electric and pneumatic tools. Some reamers have three symmetrically placed flats on the shank, providing a positive grip and preventing slippage during operation. I've had customers tell me they prefer not to have the flats because if the reamer gets in a bind, they want the reamer to slip. Slipping saves them from busted knuckles. Some reamer brands give both options. I also personally prefer reamers that have a stop collar on them preventing the reamer from going too far.
Best Uses for Reamers
Reamers are versatile tools that can be used in a wide range of materials, including aluminum, brass, bronze, cast iron, copper, metal, nickel, plastic, and steel. They are commonly employed in industries such as construction, automotive, heavy truck, aerospace, and manufacturing. I as a DIY person find plenty of uses for them.
Techniques for Using Reamers
When using a reamer, it is important to follow proper techniques to ensure optimal results:
- Secure the workpiece: Before starting the reaming process, make sure the workpiece is securely clamped or held in place to prevent movement.
- Choose the right size: When aligning select a reamer that matches the diameter of the existing hole. Using the wrong size can lead to misalignment and poor results. When enlarging just select a reamer with the diameter that matches the hole size you desire to increase to. There is no need to step up sizes when using a reamer.
- Apply cutting fluid: To reduce friction and heat, apply cutting fluid to both the reamer and the workpiece. This will help prolong the life of the tool and improve the quality of the hole.
- Start slowly: Begin the reaming process at a slow speed to ensure proper alignment. Gradually increase the speed as the reamer enters the hole. For safety I recommend you use a drill that you feel for sure you can control the speed with.
- Monitor progress: Continuously check the progress of the reaming process to ensure the desired alignment is achieved. Make any necessary adjustments as needed. Keep adding cutting fluid as needed.
- Clean and maintain: After using the reamer, clean it thoroughly and store it in a dry place. Regular maintenance will help prolong its lifespan and ensure optimal performance. I always like to spray a little PB Blaster on the reamer prior to storage.
Reamers are reliable tools to enlarge and provide precise alignment of holes in various materials. By following the proper techniques and using the right size reamer, users can achieve accurate results in their projects. https://amzn.to/40TW0VO With all cutting tools I strongly recommend not sacrificing safety to save a few dollars.
My name is Tim Tadlock and I've been in the tool and fastener business for over 30 years. I hope you enjoyed this blog post and that it has been helpful to you in some way.
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