SITEH3RO Step Reamer

SITEH3RO™ Step Reamer — Up to 75% Longer Tool Life for Expanding Holes in Metal

The SITEH3RO™ Step Reamer is engineered for contractors and trades professionals who need to start and expand holes in metal across multiple diameters with a single tool. Featuring an exclusive SITEH3RO™ coating, these reamers deliver up to 75% longer tool life compared to uncoated alternatives, reducing downtime and replacement costs on demanding job sites. Compatible with both impact wrenches and standard 3-jaw drill chucks, they are available in all major bolt sizes to cover the full range of on-site requirements. Also available as a kit (SHUSR1) for maximum versatility.

Technical Specifications

The SITEH3RO™ coating sets these step reamers apart from standard uncoated tools by significantly extending service life, which directly reduces per-hole cost on high-volume metal fabrication and structural work. The ability to drive with an impact wrench — not just a drill — means faster cycle times and compatibility with the tools contractors already carry on site.

Key Features & Benefits

SITEH3RO™ Coating for Extended Tool Life

The exclusive SITEH3RO™ coating delivers up to 75% longer tool life compared to uncoated step reamers. For contractors working through high volumes of metal, this translates directly into fewer tool changes and lower consumable costs over the life of a project.

Multi-Diameter Cutting in a Single Tool

Each step reamer covers a defined diameter range, allowing the operator to start and expand holes across multiple sizes without swapping tools. This efficiency is especially valuable when working in confined spaces or at height where tool changes are disruptive.

Impact Wrench Compatible

Designed to be driven by an impact wrench, these reamers take advantage of the high torque output that contractors rely on for tough metal applications. Impact compatibility means faster material removal and reduced operator fatigue compared to drill-only tools.

Standard 3-Jaw Drill Chuck Compatible

When an impact wrench is not available or not preferred, the SITEH3RO™ Step Reamer fits standard 3-jaw drill chucks, giving operators flexibility across different drive tools already on site.

Available in All Major Bolt Sizes

The range covers all major bolt sizes, making it straightforward to select the correct reamer for structural steel, connection plates, and other common metal components without needing custom tooling.

Available as a Kit (SHUSR1)

For contractors who need coverage across the full diameter range, the SHUSR1 kit bundles the step reamers together, simplifying procurement and ensuring the right size is always at hand on site.

Common Applications

Expanding Existing Holes in Structural Steel

Use the step reamer to enlarge bolt holes in structural steel members to the required diameter, ensuring accurate fit-up for bolted connections on construction sites.

Starting Holes in Metal

The stepped geometry allows the tool to self-center and initiate a clean hole in metal sheet or plate without the need for a separate pilot drill in many applications.

Cleaning Out and Truing Misaligned Holes

Step reamers are well suited to cleaning out and re-rounding holes that have been distorted during fabrication or erection, restoring them to the correct diameter and finish for fastener installation.

On-Site Metal Fabrication and Ironwork

Ideal for ironworkers and steel erectors who need to modify hole sizes in the field to accommodate bolts, pins, or other fasteners across a range of diameters.

Compatible Materials

• Structural steel
• Metal sheet and plate
• Metal fabrications requiring hole expansion or starting

Frequently Asked Questions

Q: What is a Step Reamer used for?
A: The SITEH3RO™ Step Reamer is designed to enlarge and expand holes with an impact wrench in defined increments. It is perfect for drilling through tough metals in construction and on-site work.

Q: Is the Step Reamer compatible with an impact wrench?
A: Yes. The SITEH3RO™ Step Reamer is designed for use with an impact wrench and is also suitable for use in standard 3-jaw drill chucks.

Q: What diameter ranges are available?
A: The step reamers are available in three diameter ranges: 5/16"–9/16", 9/16"–13/16", and 13/16"–1-1/16", covering all major bolt sizes.

Q: Is the Step Reamer available as a kit?
A: Yes. The SITEH3RO™ Step Reamer is also available as a kit under part number SHUSR1.