HSS Step Reamer 3–flats on Shanks
Type 78–GR Gold Oxide Step Reamer
— Accurately start, Enlarge and deburr holes in material up to 1/2" thick.
— Step Reamers has five hole enlargement steps for accurate hole enlargement.
— 90° notch point starts holes easily.
— Gold Oxide – low temperature stress relief enhances lubricity,
reduces friction and increases toughness.
— Proudly manufactured in the USA
with globally sourced material
PDF — Type 78–GR Gold Oxide Step Reamer
Step, multiple-diameter, and similar reamers are included in this group, which is both broad and varied. This is valuable when reaming holes that have an interrupted surface due to cross holes, ports, or recesses.
In such work the chips are apt to rest crossways on the edges of the interruptions and case scoring. By breaking up the operation as a step reamer does the chips are finer and wash away easily with the cutting fluid, saving much spoilage. Step reamers are made with two or more reaming diameters, each of which cuts its individual portion and assures true alignment.
RULE OF THUMB is 1 % for hand reaming and 2% for machine reaming you can go more than this on larger reamers. Leave about .015"/side for reaming.
2pc. / 3pc. Gold Oxide Step Reamer Set
3pc. Type 78–GR Step Reamer Set
— Part# 83750
— Fractional sizes include: 5/16", 9/16", 13/16"
— Secure, snap-lock plastic cover.
— Proudly manufactured in the USA
with globally sourced material
2pc. Type 78–GR Step Reamer Set
— Part# 83760
— Fractional sizes include: 5/16", 9/16"
— Secure, snap-lock plastic cover.
— Proudly manufactured in the USA
with globally sourced material
PDF — 2pc. / 3pc. Type 78–GR Gold Oxide Step Reamer Set