We’ve got BIG News! As of Jan. 1, 2024, all support for Elliott Tools will transition to Elliott. This includes sales and service support for all metal finishing, burnishing, recessing and mechanical joining tools previously sold by Monaghan. This will open the door for us to focus in on our goal of being your “cutting tool expert”. 

Case Study: Burnishing a Master Cylinder Piston

THE CHALLENGE

A customer of ours was manufacturing master cylinder pistons made of 3415 case hardening steel using a Doosan Lynx 220-LSY CNC Lathe. The part required a surface finish of 12 Ra microinch (0.3 Ra) or better on the outside seal diameter.
Before we got involved, the customer was sub-contracting another company to grind these parts down to achieve the required surface finish, since they could not achieve the correct surface finish using a turning insert.
Here was their original process:
surface finish from a roller burnishing tool

OUR SOLUTION

Once we assessed their operation, we recommended that they use an Elliott Tool Technologies S2488-00M Single Roll OD Burnishing Tool
single roll roller burnishing tool
surface finish after using a burnishing tool

FINAL RESULTS

The single roll burnishing tool produced a surface finish of 7 Ra microinch (0.18 Ra) or better. The parts could be made all in-house, eliminating the need for expensive sub-contracting to grind the pistons. The new process only required one set-up, saving our customer lots of time and money.
Our team has worked with thousands of different applications, if you have a question or are wondering if your application can be burnished, contact us here.