The Simpson 7/8 in. x 10-1/4 in. SDS-Max Chisel Ground Rod Driver is a purpose-built demolition bit engineered specifically for driving grounding rods through sand, soil, and clay. Constructed from toughened steel and treated with a specialized hardening process for a wear-resistant surface, this bit is built to handle the repeated impact demands of electrical grounding installations and site preparation work. Its SDS-max shank delivers a secure, positive-locking connection to compatible rotary hammer drills, enabling efficient power transfer and tool-free bit changes on every job.

Key Features

• SDS-Max Shank Compatibility - Locks positively into SDS-max rotary hammers for maximum power transfer and fast, tool-free bit swaps, keeping your work moving without interruption.
• 7/8 in. Chisel Head Width - Sized to seat and drive standard 7/8 in. grounding rods accurately, reducing slippage and keeping the rod aligned during penetration.
• Toughened Steel Construction - Built from hardened steel to withstand the high-impact stress of driving rods through dense ground conditions, providing lasting durability across demanding jobsite use.
• Specialized Surface Hardening Treatment - A dedicated tempering process creates a wear-resistant outer surface that helps the bit hold up over repeated drives through sand, soil, and clay, extending its working life.
• 10-1/4 in. Working Length - Provides sufficient reach for effective rod-driving depth, giving rotary hammer operators confident control throughout the driving process.
• Purpose-Built Application Design - Engineered specifically for electrical grounding system installation and utility grounding work, so the geometry and hardness profile match the actual demands of the task rather than being adapted from a general-purpose bit.

Why This Product

• Engineered for grounding rod work, not adapted from general use - The chisel head profile and 7/8 in. width are designed from the ground up to seat and drive grounding rods through sand, soil, and clay, giving electricians and grounding contractors a tool matched to their specific application.
• Hardened surface treatment extends service life - The specialized tempering process creates a wear-resistant surface that holds up under the repeated impacts required for driving rods through dense or compacted ground, reducing premature bit wear on active job sites.
• SDS-max shank means no downtime for bit changes - The positive-locking SDS-max connection allows tool-free bit changes on compatible rotary hammers, keeping transitions between tasks fast and secure without interrupting workflow.
• Simpson quality with traceable origin - Produced by Simpson, a recognized name in structural and installation hardware, this ground rod driver carries the brand credibility contractors rely on for critical electrical grounding and site preparation applications.

Specifications

• Model Number: CHMXRD08710
• Shank Type: SDS-Max
• Head Width: 7/8 in.
• Length: 10-1/4 in.
• Country of Origin: Germany

Approved Applications

• Driving grounding rods through sand
• Driving grounding rods through soil
• Driving grounding rods through clay
• Electrical grounding system installation
• Site preparation and utility grounding work requiring demolition-class bit performance

All product specifications and features described above are based on manufacturer data for Simpson Model CHMXRD08710. Verify compatibility with your specific rotary hammer tool prior to use. Always follow applicable safety guidelines and local electrical codes when installing grounding systems.

Frequently Asked Questions

What type of rotary hammer is this ground rod driver compatible with?

This driver is designed with an SDS-max shank, making it compatible with SDS-max rotary hammer drills. The SDS-max connection provides a secure, positive-locking fit and allows for tool-free bit changes on compatible hammers.

What ground conditions can this driver handle?

The Simpson CHMXRD08710 is engineered to drive grounding rods through sand, soil, and clay. Its toughened steel construction and hardened surface are specifically designed to withstand the demands of penetrating these dense ground conditions.

What size grounding rod is this driver intended to seat and drive?

The chisel head is sized at 7/8" wide, which is designed to effectively seat and drive standard 7/8" grounding rods used in electrical grounding installations and site preparation work.

What is the overall length of this ground rod driver, and how does it benefit the user?

The driver measures 10-1/4" in overall length. This compact size is intended to provide controlled, efficient operation during grounding applications, giving the user a manageable working length when paired with an SDS-max rotary hammer.