Sprue Bush Reamers
HSS Sprue Bush Reamer - These Machine Reamers are designed specifically for the purpose of reaming sprue bushes for plastic moulds. Available in the duplex form which is designed to remove the rifling and give a perfectly finished hole. Also available in quick spiral form which is designed for stock removal. This reamer is available in 1°, 2°, 3°, 4°, inclusive angle.
Quick spiral should be used for roughing and the duplex for finishing.
Sourced from Gammons in the USA.