---
title: CNC Precision Grinding Honing Lapping | Evans Machine | Manufacturing
description: Discover EMI's CNC precision grinding, honing & lapping services, featuring advanced cnc machines for perfect results with tight tolerances across a wide range of materials | Evans Machine Inc | Brockton, MA
image: https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1311175923%20(16X9).jpg
---

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# CNC PRECISION GRINDING, HONING & LAPPING

 

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- CNC Precision Grinding, Honing & Lapping

## What Is CNC Precision Grinding, Honing & Lapping?

Grinding, honing and lapping are abrasive manufacturing processes used to refine the surface profile of a workpiece.

CNC (Computer Numerical Control) machines that perform these processes are able to achieve precision results that meet the desired surface characteristics specifies by our customer partners' engineers.

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1153273571.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-803862938.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-896359378.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hs-fs/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1399970348.jpg?width=509&height=339&name=iStock-1399970348.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1153273571.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1153273571.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-803862938.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-896359378.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hs-fs/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1399970348.jpg?width=509&height=339&name=iStock-1399970348.jpg)

![emi-cnc-precision-grinding-honing-lapping-services](https://emievans.com/hubfs/CAPABILITIES%20and%20SERVICES/CNC%20MACHINING/CNC%20Precision%20Grinding,%20Honing,%20Lapping/iStock-1153273571.jpg)

## **GRINDING**

Grinding employs a rotating abrasive wheel to remove material from the surface of a flat or contoured workpiece. EMI's CNC grinding machines can be used for either roughing or for final finishing depending on the final surface roughness you need.

## **HONING**

Honing is generally associated with finishing bores and cylinders and involves abrading a surface to improve the geometric form and dimensional accuracy of a cylindrical part's surface or even create a specific finish itself.

## **LAPPING**

Lapping is a precision finishing process that uses loose abrasive particles suspended in a fluid to remove material and create a smooth, flat surface on a workpiece and is used to achieve extremely tight tolerances for flatness, surface finish, and parallelism.

 

EMI brings decades of experience to machining the right surface profile for your parts.

Our expertise allows us to machine parts with **tolerances as tight as ±0.0001″ (±0.00254 mm)** and achieve **surface roughness to 8 Ra and #4 finish** for grained direction parts.

## EMI's Grinding, Honing & Lapping Equipment

EMI can precision **grind both flat and cylindrical surfaces,** including both **outer and inner diameters**.

EMI can precision **hone in both horizontal and vertical orientations**.

- Okamoto Surface Grinder *… up to 16 x 32"*
- Harig Super 618 Surface Grinder
- Norton OD Grinder
- Dumore ID Grinder
- Sunnen Automatic Horizontal Honing Machine
- Sunnen Automatic Vertical Honing Machine

For a complete list please visit our [**Equipment & Facilities**](https://emievans.com/equipment-facilities) page.

## Materials EMI Grinds, Hones & Laps

### **Ferrous Metals **

- Iron, Stainless Steel, Carbon Steel, & more

### **Non-Ferrous Metals **

- Aluminum, Brass, Bronze, Copper, Nickel & more

### **Exotic Metals **

- Copper Tungsten, Hastelloy, Inconel, Kovar, Monel, Titanium & more

### **Plastics & Composites**

- ABS, Lexan, Ultem, Ertalyte, Delrin, Noryl, Radel, PVC, UHMW-PE, CFRP, GFRP, MMCs, CMCs & more

For a complete list please visit our [**Materials**](https://emievans.com/materials) page.

## Got an Urgent Job?

[request a quote](https://emievans.com/rfq-file-transfer)

## Testimonials

![Testimonial EMI attention to detail for Precision Machining, Welding and Surface Finishing](https://emievans.com/hubfs/TESTIMONIALS/DTM%20Packaging/DTM%20Pkg%20Testimonial%20Block%205/Testimonial%20Panel%20(350%20x%20350)%20-%20DTM%20Packaging%205%20Light%20Gray.png "Testimonial EMI attention to detail for Precision Machining, Welding and Surface Finishing")

![Testimonial EMI rapidly turns around RFQs and keeps is updated](https://emievans.com/hubfs/TESTIMONIALS/Harmonic%20Drive/Harmonic%20Drive%20Testimonial%20Block%204/Testimonial%20Panel%20(350%20x%20350)%20-%20Harmonic%20Drive%204%20Light%20Blue.png "Testimonial EMI rapidly turns around RFQs and keeps is updated")

![Testimonial look forward to continuing business partnership and personal friendship with EMI](https://emievans.com/hubfs/TESTIMONIALS/Paquette%20and%20Assocs/Paquette%20Testimonial%20Block%207/Testimonial%20Panel%20(350%20x%20350)%20-%20Paquette%20%26%20Assocs%207%20Light%20Red.png "Testimonial look forward to continuing business partnership and personal friendship with EMI")

## **Why EMI?**

Choosing the right outsourcing partner for your precision manufacturing needs can be the **difference between success or failure** for a given project. The question is how to choose.

The answer is to optimize for the right relationship. Choose a partner that **supports your supply chain** needs by delivering **responsive service**, open **two-way communications**, and **on-time delivery**.

For more than a half-century and continuing to this day, EMI always seeks to **co-create the right relationship by prioritizing our partners' success**.

### Our Promise:

## **“More than Parts: Partnership.”**

**Contact us today to start building the right relationship.**

## Related Pages

[» Industries](https://emievans.com/industries)  
[» Equipment & Facilities](https://emievans.com/equipment-facilities)  
[» Quality Assurance](https://emievans.com/quality-assurance)

## Start a Conversation

[Talk to an Expert](https://emievans.com/contact-emi)

[![EMI Evans Machine Co Inc.](https://emievans.com/hs-fs/hubfs/EMI%20LOGOS/EMI%20Logo%20PNG%20(360%20x%20144%2072%20DPI)%20Transparent%20Cropped.png?width=244&height=94&name=EMI%20Logo%20PNG%20(360%20x%20144%2072%20DPI)%20Transparent%20Cropped.png "EMI Evans Machine Co Inc.")](https://emievans.com/)

**Evans Machine Co., Inc.**

32 N. Manchester St.  
Brockton, MA 02302

[508-584-8085](tel:1-508-584-8085)

### Quick Links

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### EMI is...

Based in Brockton, MA and family-owned since 1968, EMI helps **Advanced Manufacturers** with **outsourced production** so they can **WIN by being the best partner to their Customers**.

Our broad range of **more than 50 of the latest CNC precision machines**, and our assembly and other value-added services, helps our customers **expand their manufacturing capabilities on demand**.

**With EMI, Advanced Manufacturers can focus on their core mission**, knowing they are backed by a world-class outsourcing partner.

Our promise: **[“More than Parts: Partnership.”](https://emievans.com/brand-statement)**

© 2026 Evans Machine Company, Inc. All rights reserved.  |  [Certifications & Accreditations](https://emievans.com/certifications-accreditations)  |  Cage Code #6Y843

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