em79 - Rottler Manufacturing

East Holmes Auto Repair: Delivering Peace of Mind to Its Customers

Sage Osterfeld — Thu, 14 Aug 2025 18:30:09 +0000

On this episode of Rottler Featured Series join us at East Holmes Auto Repair and Holmes Performance and Machine in Millersburg, Ohio.

Co-owners Steve Troyer and Casey Butler founded East Holmes in 2016. Today they’re a full service automotive performance and industrial machine shop with a particular focus on work trucks and fleet vehicles.

Knowing that many of their customer depend on the vehicles and equipment to get their work done, East Holmes puts attention to detail on everything they send out the door. “We want to give our customers peace of mind,” Troyer said.

As part of that dedication to quality, one of East Holmes’ first investments was in an H85AX automatic hone. A short time later they added an EM79 engine machining center that gives them the ability to machine everything from a 4 cylinder block all the way up to Cat C15s, Detroits, and even bigger blocks.

“Often times there’s promises made but not promises kept. That’s not true with Rottler,” Troyer told us. “If they say they’re going to do it, they do it.”

“And its not just the machines, it’s the relationships we’ve made with other people in this industry through Rottler. That’s just been huge,” Butler added.

Here at Rottler, we’re proud to call East Holmes a customer and partner. Check out their story!

The post East Holmes Auto Repair: Delivering Peace of Mind to Its Customers first appeared on Rottler Manufacturing.

Donrich Machine: How a One-Man Shop Grew to a Thriving Diesel Reman Operation

Sage Osterfeld — Thu, 10 Apr 2025 18:00:23 +0000

In this episode of Rottler Featured Series, we’re in McCool Junction, Nebraska home of Donrich Machine a full-service machine shop focused on agricultural and industrial diesel and gas engines.

Corey Schlegelmilch, owner of Donrich Machine tells us he bought the business about 20 years ago, starting out as a one-man shop in a 2,000 square foot building with a handful of equipment. Since then, he’s grown Donrich into a thriving business with a team of employees and a new 7,200 square foot facility.

Being located in America’s heartland it’s no surprise that a good portion of their business is servicing the workhorse diesels that keep the water flowing and the crops growing in the farm fields of the Midwest. Donrich services a lot of engines like Cummin ISXs, CAT C15s and Detroit 60s. To get that work done quickly and done right, they’re using the Rottler EM79 engine machining center along with the H85AX automatic hone and an S80 series surfacer.

According to Corey, one of the big advantages using Rottler equipment is the ability to work on a diesel and then switch it up to machine gas V8 with near zero downtime. Plus, with the increased speed and accuracy of Rottler’s CNC technology, he knows it’s going to be spot on with the machining specifications.

We asked one of Corey’s machinists and told us what he appreciates about the Rottler equipment is anyone can learn it. It only takes a few minutes to master and, unlike other machines, you don’t need to stand there and watch it to make sure it’s working. “You hit the button and walk away,” he said. “You’re free to go work on something else.”

Corey summed it up pretty well. “I’ve been using Rottler equipment since I started in this. They always build a good product, they support it, and you know they’re going to be around for a long time,” he said.

He’s right too. Thanks to customers like Donrich Machine, we’re celebrating our 102nd anniversary this year and we’re looking forward to 102 more!

Check out the video. And, if you’re in Donrich’s part of the country and in need of service on your ag equipment, make sure to give them a call!

The post Donrich Machine: How a One-Man Shop Grew to a Thriving Diesel Reman Operation first appeared on Rottler Manufacturing.

Automechanika 2024 Show Wrap-up

Sage Osterfeld — Mon, 16 Sep 2024 17:19:38 +0000

The Rottler Booth at the Automechanika 2024 show in Frankfurt, Germany

Last week we traveled to Frankfurt, Germany to participate in the big Automechanika 2024.

Our guys, Dylan Chamberlain and Ryan Thompson, were on the show floor with the EM79, the F69, and H85AX to give some of the 108,000 attendees from 80 countries hands-on demos of the latest technology and equipment from Rottler.

Check out a few photos from the show.

It was an amazing show, and a fantastic opportunity to meet engine builders and auto enthusiasts from around the world.

A big thank you to everyone who dropped by the booth to see us. We’re looking forward to doing it again!

The post Automechanika 2024 Show Wrap-up first appeared on Rottler Manufacturing.

5537A 4th Axis Replacement for 690-3-63 4th Axis

Sage Osterfeld — Thu, 12 Oct 2023 23:56:18 +0000

APPLICATION BULLETIN: AB008

Applicable Machines

EM69ATC
EM79
F69A

download pdf

Relevant Parts

5537A: Computer Controlled Automatic 4th Axis – Proprietary Rottler Design allowing for high accuracy machining of Engine Blocks (all models) and Cylinder Heads (EM69HP). Power Sliding Tail Stock on Linear Slideways provides for increased versatility and fast set up and change over. Requires mounting system adapter kits listed in the details. Maximum Engine Block Length 30″ (762mm) overall/outside length. Maximum Cylinder Head Length 37″ (940mm) overall/outside length

5537C – Universal Engine Block Mounting System
5537B – Universal Cylinder Head Mounting System
5537D – Universal 3 Jaw Scroll Chuck
5517F – T-slot Table For Mounting Manifolds, Heads, Raw Stock, or Vises in 5537A 4th Axis
11110 – Riser Kit for 4th Axis Compatibility on EM79

Overview

Rottler Manufacturing has improved upon its 4th axis offering for the CNC block machining centers, which include the F69A, EM69ATC, and EM79 series machines. Historically, these machines were offered with the 690-3-63 4th axis. The 690-3-63 4th axis was comprised of a worm drive gear box rotary axis for its head stock, and a pneumatically sliding tail stock.

Now, Rottler has introduced the 5537A Zero Back Lash Servo Driven 4th Axis System. The 5537A 4th axis retains the same working capacity as the 690-3-63 system with improvements being made to the rigidity, precision, and flexibility of the 4th axis system. The 5537A uses a servo driven headstock with a zero backlash direct drive planetary gearbox, and retains a pneumatically sliding tail stock design, with the difference being that the 5537A tail stock uses precision linear slideways which allowed improved range of motion from 6″ of travel to 7″.

The 5537A also includes a modular headstock and tail stock design, which allows fixture change overs between Block fixturing, Head fixturing, and Universal Part Fixturing. The attachments for change over include 5537C for Blocks, 5537B for Heads, 5537D for 3 Jaw Chuck, and 5517F – in conjunction with 5537B – for Universal T-Slot Table.

Figure 1: 5537A 4th Axis

Sections – Work Envelope and Use Cases

Block Work

The 5537A 4th Axis has the same capacity for block work as the old 690-3-63 4th Axis. Table to Centerline of the 5537A is 13.5″, this is the max swing radius allowed in the 4th axis for blocks. This accommodates all common domestic V8 engines, currently including large diesel V8 blocks such as 6.7L Powerstroke and 6.6L Duramax.

Block work can be performed using the 5537C Block Fixturing Kit and the common 650-x-xx 4th axis locator kits and individual main and expanding cam locators typically used with the previous 690-3-63 4th axis. These items can be found in the details section of the quoting system or from your local sales representative.

Figure 2: 5537C Block Fixturing System and 650-x-xx Locators

Head Work

The 5537A may be equipped with the optional 5537B Cylinder Head Mounting System. When equipped with the 5537B, the common PFIX-xx cylinder head porting plates can be used to mount cylinder heads in the 4th axis. This configuration allows for the capability of performing 4 axis machining operations on cylinder heads. Operations such as machining valve cover surfaces, manifold surfaces, seat pockets, guides, Oring interpolation, and engraving may be performed on various cylinder heads. The PFIX-xx plates can be found in the details section for the 5537B mounting system.

Figure 3: 5537B Cylinder Head Mounting System

Figure 4: PFIX-LS1 Cylinder Head Plate

Universal Parts Work

The 5537A may be equipped with the optional 5537D Universal 3 Jaw Chuck or the 5537B in conjunction with the 5517F T-Slot Mounting Table. These fixturing systems allow for work to be performed on either cylindrical raw stock with the 5537D 3 Jaw Chuck while the 5517F allows for the mounting of vises for positional 4 axis machining of billet parts.

Incorporating these fixturing systems allows for flexibility and opportunities for work to be performed on Rottler equipment outside of the standard engine block work. This greatly increases the value proposition of a Rottler CNC block machining center, seeing as it allows shops to perform work in-house that they may have previously had to outsource or refuse.

Figure 5: 5517F Universal T-Slot Table

Figure 6: 5537D Universal 3 Jaw Chuck

CONTACT

For additional information regarding Rottler Manufacturing’s new and improved 5537A 4th Axis, please contact Ryan Thompson or Nick Jenkins via the emails listed below.

Ryan Thompson, Lead Applications Engineer, Tel: +1 (206) 707-2458
Nick Jenkins, Applications Engineer, Tel: +1 (206) 406-1880

The post 5537A 4th Axis Replacement for 690-3-63 4th Axis first appeared on Rottler Manufacturing.