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    Norstone

    Specializing in Particle
    Size ReductionSINCE 1982

    (484) 684-6986
    sales@norstoneinc.com
    Request a Quote
    Featured products

    Solutions We Deliver

    Grinding Media Depot

    A full range of grinding medias are available for all types of mills requiring balls, rods, cylinders, beads, pebbles for efficient particle size reduction, deagglomeration, mixing and blending

    Milling Equipments

    Wide variety of reduction equipment for dry, wet and paste processing including all types of bead mills, jet mills, jaw crushers, hammermills, universal mills, knife mills, classifier mills

    Blade Depot

    A full range of mixing and dispersing blades are available in stainless steel, carbon steel, tungsten carbide coated steel and POLYBLADES in urethane, UHMW, PTFE, Nylon, Polypropylene, PEEK including anti-static materials to fit all mixer and disperser designs. Pharmaceutical grade blades are available. Custom blades can also be manufactured.

    Dispersers & Mixers

    Large selection of dispersers for grinding, deagglomeration, homogenizing and pre-grinding prior to milling as well as mixers for slow to high speed blending of ingredients which can be powders to powders, powders to liquid, powders to gas, liquids to liquids, liquids to powders and liquids to gas.

    Tank PROvider

    All types of tanks and all types of materials are available. View our wide collection including stainless, carbon, fiberglass, polymer, hastalloy and other exotics for indoor or outdoor, jacketed, insulated, portable, open or closed top and matching agitators.

    Abrasion Resistant & Non-Metal Parts

    Custom parts, coatings and linings for protection against abrasion, corrosion and metal contamination where necessary. Get longer life out of machine parts, piping, linings and surfaces through casting, injection molding, fabrication, tiling, and spray. Mold making services are also available.

    Our Process

    Here's How It Works

    01

    Tell us what you need

    You can call us directly or fill out the REQUEST FOR QUOTE form. Your request will go to the right person, and will not remain in a general mailbox. We will call you asap or send you a more detailed form if we need more information.

    02

    We work through it with you

    You will hear back from someone who actually knows the product. Not a ticketing system. Not an automated response. A person. We will go over your requirements together: materials, quantities, application specs, whatever it takes to get it right. If we have questions, we will ask. If you have questions, ask us anything.

    03

    We get it to you

    Once you approve the quote, we place the order and keep you in the loop. If anything comes up along the way, you will hear from us directly. Same number, same people, start to finish.

    Request a Quote
    about us

    You Get Us.
    A HUMAN, Not a bot

    Family-owned and operated since 1982. We believe customer service should still feel personal. Call us and someone will answer. If you need to talk through a request, we have technical salespeople to review your application. Email us and you’ll hear back from a person who can help.

    We believe good service starts with having a trusting relationship with our customer. You are the most important ingredient in our business.

    +1 484 684 6986
    Request a Quote
    1982Company Founded

    Norstone was started by Samuel E. Firestone at age 55 after a career in the coatings and ink industries. The original name was S.E. Firestone Associates. The business began in the family home as a manufacturer's rep agency selling chemicals, media, and grinding equipment.

    1990Polyblade Innovation

    Sam was given the opportunity to develop a polymer dispersing impeller for abrasive slurries and products that could not tolerate metal contamination. Working with a local TiO2 company, the impeller was modified to maximize blade pumping, using two durometers in one polyurethane impeller: a harder center for support and a softer, abrasion-resistant outer area. By 1994, the product was ready for marketing and was named the Norstone Impeller in honor of Norma Firestone.

    1992–1996Brand Expansion

    Daniyel Firestone, Sam's middle daughter, joined the company to assist with sales. She trademarked the Norstone name for the Polyblade, expanded the line to specialize in teaching, testing, and grinding media, and began purchasing the company from Sam.

    1999–2007Patents & Trademarks

    Norstone secured a patent and trademark protecting the Norstone Polyblade’s design and manufacturing process, and trademarked the names Blade Depot and Grinding Media Depot.

    2001Norstone, Inc.

    Sam and Daniyel changed the company name to Norstone, Inc. after years of confusion with “S.E. Firestone” and consumer calls about tire service.

    2002Product Line Expansion

    Building on the Polyblade’s success, Norstone expanded into custom parts, coatings, linings, ball mill ceramic brick, and ball mill relining for abrasive processes and metal-contamination-sensitive applications.

    2004–2006Leadership Growth

    Daniyel Firestone was named President of Norstone, Inc., Sam Firestone was named CEO, and Molly Howard, Daniyel’s daughter, joined the company.

    2009–2016Innovation & Patents

    Norstone entered a period of rapid product growth: it invented the Trapolene tank cover, patented the Turbo Polyblade, invented the Blade Guardian safety shield, and patented the HS Polyblade. Chris Howard, Molly’s husband, joined Norstone during this stretch.

    2023New Headquarters

    Norstone purchased an 8,300-square-foot building in Norristown, PA for office, shipping, and warehousing, adding the ability to screen and wash grinding media for customers recapturing on-size beads from old media charges.

    2025–2026Third Generation Leadership

    Norstone completed its leadership transition: Chris Howard became President and Molly Howard became Vice President, with Daniyel Firestone continuing as CEO. Molly and Chris Howard became 100% owners of Norstone, Inc.

    Industries Served

    Who We Work With

    Paint and Coatings
    Minerals
    Cosmetics
    Pharmaceuticals
    Inks
    Electronics / Batteries
    Ceramics
    Food Processing
    Tech presentation
    tech presentation

    Request a FREE presentation for you or your team

    Learn about grinding media selection, nano-grinding, blade dynamics, agitation principles, and more through a free presentation tailored to your team. Our experts will walk you through key concepts, answer questions, and provide relevant technical resources.

    Need presentation before you spec? Just ask. We have it.

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    FAQ

    Frequently Asked Questions

    Get in touch

    Request a Quote

    Norstone, Inc. is a family-owned particle size reduction specialist, in business since 1982. From grinding media and blades to complete milling equipment and custom parts, tell us what you are working on and a real person on our technical sales team will help you spec it.

    Norristown, Pennsylvania

    Call us(484) 684-6986
    Email ussales@norstoneinc.com
    Email us for a quote