Tramming Ring – Precision Mill Head Alignment Tool (Made in USA)

Accurately tram your milling machine head with speed and confidence. Designed for "Bridgeport"-style vertical mills, this precision tramming ring provides smooth, repeatable indicator readings for fast and reliable alignment.

Even slight head misalignment causes tapered cuts, poor surface finish, and dimensional errors. This tool eliminates guesswork and reduces setup time.

Key Benefits

✔ Faster mill head alignment

✔ Smoother indicator movement (reduced needle bounce)

✔ Improved machining accuracy

✔ Hardened for long-term durability

✔ Made in USA

Built for Precision

Manufactured from premium 52100 bearing steel and heat treated for durability, each ring is precision ground to provide a smooth, consistent outer surface. This allows your dial test indicator to glide cleanly during adjustment, making fine tramming corrections easier and more repeatable.

Designed specifically for vertical style knee mills and similar vertical milling machines.

Technical Specifications

• Material: 52100 Bearing Steel

• Heat Treated to 60HRC

• Precision Ground for parallelism .0003"

• Designed for Bridgeport-style vertical milling machines and similar knee mills.

• O.D. - 6.000"

• I.D. - 3.660"

• Thickness - 1.000"

• Manufactured in the United States