Adjustable Reamer
Description
An Adjustable Reamer is a precision hand tool used in fitting and machining work to enlarge and finish previously drilled holes to an accurate diameter. Unlike a fixed reamer, the adjustable reamer has blades that can be expanded or adjusted slightly to accommodate different hole sizes. It is commonly used by fitters and machinists when accurate hole finishing is required. The tool helps improve the smoothness, size accuracy, and alignment of holes in metal components.
Uses
- Finishing drilled holes to precise dimensions.
- Removing small amounts of material from holes.
- Improving the smoothness and accuracy of holes.
- Repairing worn or slightly oversized holes.
- Used in machine fitting and maintenance work.
Parts of Adjustable Reamer
- Reamer Blades: Cutting edges used for enlarging the hole.
- Blade Slots: Grooves that hold the adjustable blades.
- Adjusting Nuts: Used to expand or contract the blades.
- Body: The central structure holding the blades.
- Square Shank: Used to hold the reamer with a tap wrench.
Material
- High Speed Steel (HSS)
- Alloy steel body
- Hardened and tempered cutting blades
Shape
An Adjustable Reamer has a cylindrical body with multiple straight blades arranged around it. The blades can be adjusted slightly using nuts at both ends of the tool. The lower end contains a square shank which allows it to be turned using a tap wrench. The tool is long and straight, designed to enter drilled holes easily.
Safety Precautions
- Use the correct size reamer for the hole.
- Always rotate the reamer slowly and evenly.
- Apply cutting oil to reduce friction and wear.
- Do not reverse the reamer while inside the hole.
- Hold the tool properly using a suitable wrench.
- Wear safety gloves and goggles during operation.
Conclusion
The Adjustable Reamer is an important tool used in fitting and machining operations for producing accurate and smooth holes. Its adjustable blades make it versatile for slightly different hole sizes, making it useful in repair and maintenance work.