Relton (P - 14) 7 - 8" Porcelain Hole Saw Complete Drill Bit - Isopure Water - P - 14
Relton

Relton (P-14) 7-8" Porcelain Hole Saw Complete Drill Bit

Product Code P-14

$150.70
The Relton P-14 7/8" Porcelain Hole Saw Complete Drill Bit is a spring-loaded specialty saw engineered for the second stage of porcelain countertop cutting, delivering smooth, chip-free beveled grooves through porcelain surfaces without damaging the underlying cast iron base. This professional-grade bit features a spring-loaded design that controls depth precisely, ensuring clean cuts in delicate porcelain installations.
SPECIFICATIONS

Relton P-14 Core Specs

Cutting Diameter
7/8 inch
Standard porcelain penetration size
Model Number
P-14
Relton professional series
Application Stage
Step 2
After pilot hole, before cast iron
Cutting Surface
Porcelain only
Does not cut through base material
Edge Profile
Beveled groove
Chip-free finish
Depth Control
Spring-loaded
Prevents over-drilling into cast iron
TECHNICAL DETAILS

Technical Specifications

Manufacturer Relton Corporation
Part Number P-14
Cutting Diameter 7/8 inch (22.2mm)
Spring Mechanism Integrated depth control spring
Cut Type Beveled groove, chip-free finish
Material Compatibility Porcelain enamel surfaces over cast iron
Installation Stage Second step in multi-stage countertop drilling process
COMPATIBILITY & APPLICATIONS

Where This Drill Bit Works

The Relton P-14 is designed specifically for porcelain-enameled cast iron countertops commonly found in vintage kitchen and bathroom installations. Use this bit after completing your pilot hole with a carbide-tipped bit, and before final penetration through the cast iron base. The spring-loaded mechanism ensures you cut cleanly through the brittle porcelain layer without chipping or cracking, while stopping before the metal substrate. This is a specialized tool for plumbers and contractors installing faucets, water filtration systems, soap dispensers, and other fixtures in porcelain countertops. The 7/8 inch diameter accommodates standard water line penetrations and mounting hardware.

💧 The spring-loaded design is what separates this from standard hole saws. Let the spring do the work and advance slowly through the porcelain layer. Rushing this step is what causes chips and cracks that ruin an otherwise clean installation.