Viking Drill and Tool St. Paul MN
America's Finest High-Speed Steel Cutting Tools™

Proudly Manufactured in the USA
 PRODUCT CATALOG >> Type 78–GR Gold Oxide Step Reamer

HSS Step Reamer 3–flats on Shanks

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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.

Adobe Acrobat Logo PDF — Type 78–GR Gold Oxide Step Reamer

 


HSS Step Reamers
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. HSS Step Reamers 3–flats on Shanks
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.

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.

Adobe Acrobat Logo PDF — 2pc. / 3pc. Type 78–GR Gold Oxide Step Reamer Set