Mastering Tool Grinding: Techniques and Tips for Machine Reamers

Technology Robotics

Learn the essential techniques and tips for tool grinding in a machine shop, with a focus on sharpening machine reamers. Discover how to set up and use surface grinders and milling machines for reamer sharpening, as well as important considerations for resizing and tuning reamers.

Machine Reamer Sharpening

⚙️Surface grinder or milling machine can be used for tool grinding in a machine shop.

⚙️A setup for sharpening machine reamers on a surface grinder is demonstrated.

⚙️The same setup can be transferred to a milling machine with a small modification.

⚙️Grinding operations can be performed on a milling machine using a cup wheel.

⚙️Precautions such as dust extraction and machine protection are necessary to prevent damage.

Resizing and Tuning Reamers

🔧Backing off reamers prevents friction and trouble in the bore.

🔧Resizing reamers can be done with an outside lap and lapping compound.

🔧Lapping the OD of a reamer can improve its cutting ability.

🔧The diameter of a reamer can be altered by burnishing it with a piece of carbide.

🔧The reamer can be tuned by chamfering or rounding over the transition between the chamfer and the cylindrical part.

FAQ

What machines can be used for reamer sharpening?

Surface grinders and milling machines can both be used for reamer sharpening.

How can reamers be resized?

Reamers can be resized using an outside lap and lapping compound.

What precautions are necessary for grinding operations?

Precautions such as dust extraction and machine protection are necessary to prevent damage.

How can the cutting ability of a reamer be improved?

The cutting ability of a reamer can be improved by lapping its OD.

What can alter the diameter of a reamer?

The diameter of a reamer can be altered by burnishing it with a piece of carbide.

Summary with Timestamps

🔧 0:07The video discusses using a surface grinder or a milling machine for tool grinding in a machine shop.

🔧 4:39The video discusses the use and geometry of a machine reamer for grinding and cutting materials.

💡 8:30The video discusses the importance of backing off reamers to avoid friction and trouble in the bore.

✅ 13:15The video demonstrates how to use a milling machine for grinding operations.

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