Rottler EM79

Multi-Purpose CNC Machining Center

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Machine Operations

  • Automatic Tool Changer
  • Block Surfacing
  • Blue Print Boring
  • Boring & Sleeving
  • Circular Interpolation
  • Connecting Rod Boring
  • Cylinder Boring
  • Cylinder Head Resurfacing
  • Lifter Boring
  • Line Boring
  • Multi Purpose CNC (Custom Parts)
  • Thrust Cutting

Product Details


We at Rottler have been designing and manufacturing machines since 1923 and we used those 89 years of experience to produce a new class of machine intended for both the small to medium size diesel engine rebuilder and the performance racing engine builder. These versatile machines are able to perform common jobs such as boring/sleeving, surfacing (heads and blocks), main and camshaft line boring, and general industrial CNC machining with Rottler CAM software.Our latest CAD Software (featured in the EM79 and several of our other models) allows our tools to incorporate many functions and roles in one multi-purpose machining center, providing the diversity of many different machines in one package.The EM70 Series completes the range of Rottler Machinery that exists today

  • Windows Touch Screen Operating System – Rottler uses Windows Touch Screen Technology on a 19″ touch panel. The Windows software has many advantages such as it’s common user interface that is easy to learn and fast to operate.
  • Instant Internet Support – Rottler offers cutting edge internet support direct from your machine to the factory. Skype is installed for internet support. This feature gives you instant, direct contact with Rottler right on the machine without even making a phone call.
  • Automatic Tool Changer – Automatic Tool Changing System available for production machining applications.
  • Traveling Column Design – Allows stationary work piece for increased accuracy.
  • Extra Height Capacity – Easily handle medium size diesel blocks forincreased versatility.
  • Large Turcite Coated Box Ways – Turcite coated bedways for reduced friction, longer life and better accuracy.
  • Extra Long T-slot – Work Table for dual workstations and increased versatility
  • World Standard CAT40 Spindle – For fast tool changing and worldwide versatility. Sliding Quill Spindle Design –  For deep hole machining required for block work.
  • Servo Motors – Offer maximum torque and performance throughout the RPM range for precise accuracy and increase productivity.
  • Single Phase 208-240V – For power efficiency that saves electrical running costs.
  • Automated Workhead Tilting System – Provides superior surface finish.
  • Extra Long T-slot Work Table – for Dual Workstations and Large Blocks for increased versatility.
  • Direct Drive Precision Ball Screws – Give long trouble free life and accurate movement.
Rottler Exclusive Touch Screen Programming
The conveniently located control pendent centralizes the machine controls. Only the buttons and interactive menus required for a particular machine operation are displayed. Machine operations can easily be done manually or automatically, with the ability to store programs in memory. Digital readout allows the operator to accurately monitor position at all times. Control operates in metric and inch systems.

Fully Programmable Cycles
Conversational 3 axis CNC control, PC based with Windows Operating System.

Dimensions and Control through Touch Screen:

  • Program Bore Centers, Exact Depth, Speed, Feed, etc.
  • Machines complete bank or main line in Automatic Cycle.
  • Lower Offset Boring allows lower sleeve repair in Automatic Cycle.
  • Circular Interpolate Counterbores for Radius Undercut or Wide Counterbores.
  • Surfacing/Milling – Multiple Pass – program for Rough Cut and Finish Cut for superior surface finish.
  • Line Boring – program the bearing bores and length of each bore and the machine automatically moves from bore to bore, completing the line unattended.
  • Face Main Line Thrust Faces square to centerline of Crankshaft using Rottler Circular Interpolation software.
  • CNC (Computer Numerical Control) Machine using Windows Operating System and Industrial PC with Intel Processor. Precision Programming and Control  thru a 15″ (400mm) Computerized Touch Screen.
  • Software options available for Programmable & Automated Cycles such as Boring, Surfacing, Lower Sleeve Offset Boring, Water Hole Repairs, Main & Cam Line Boring, General CNC Machine Work
  • USB flash drive for file transfer to and from computer
  • Internet connection to the machine computer must be provided for training support and service.
  • Machine/Computer can operate in either inch or metric system
  • 3 Axis movement by Direct Drive Precision Ball Screws
  • All motors – AC Servo Motors – Infinitely Variable    
  • Horizontal Movement (X Axis) – Left and Right Direction – 72” (1830mm)
  • Horizontal Movement (Y Axis) – In and Out Direction – 12” (305mm)
  • Vertical Movement (Z Axis) – Up and Down – 18” (457mm)
  • Vertical, Horizontal and Spindle Load Monitoring for Fast Overload Shut Down
  • Precision Position Display in .0001″ (.002mm) Resolution.
  • Electronic Handwheel for manual movement – per click: Coarse Mode .01″ (.25mm) Medium Mode .001″ (.01mm) Fine Mode .0001″ (.002mm)
  • Infinitely Variable Feedrates adjustable by handwheel during automatic cycles
  • High Performance Spindle Rotation AC Brushless Servo Motor and Drive System
  • Hard Chromed Precision Spindle with High Speed Angular Contact Bearings
  • CAT40 Spindle Taper with Pneumatic Quick Change Tool System
  • Fast Rapid and Jog Speeds for Reduced Cycle Time
  • Automatic Workhead Tilt System for Back Clearance during Surfacing
  • One Piece Heat Treated Mehanite Cast Iron Machine Castings
  • Air Pressurized Column for Less Friction and Accurate Positioning
  • Turcite Coated Slideways for Low Friction and Extended  Life
  • Automatic Central Lubrication System monitored by computer
  • LED Work Light (mounted)
  • Chip Guard with Adjustable Pivot Arm
  • Operation, Programming and Spare Parts Manual – Digital
EM79 Machine Specifications American Metric
Control Automatic
Touch Screen 15″ 381mm
Machine Height 118″ 2989mm
Table – Size 91.6″ x 22.6″ 2325 x 575mm
Table – T Slots 5
Travel – Horizontal (X Axis) 72″ 1829mm
Travel – In/Out (Y Axis) 14″ 355mm
Travel – Vertical (Z Axis) 18″ 457mm
Travel – Spindle Nose to Table 40.44″ 1027mm
Travel – Spindle Center to Column 21.7″ 551mm
Spindle – Taper CAT 40
Spindle – Diameter 3.8″ 96.5mm
Spindle – Rotation Speed 0 to 2000 RPM
Spindle – Motor 6 HP 4.5 Kw
Tool Changer Optional
Cylinder Bore Range (with Optional Cutterheads) .75″ – 7″ 19 – 178mm
Line Bore Range (with Optional Cutterheads) 1.9″ – 5.9″ 48.5 – 150mm
Surfacing Cutterhead Diameters 10″, 14″, X” & X” 250, 360, X & Xmm
Dimensions – Machine 69D x 153W x 118″ H 1745D x 3877W x 2989mm H
Dimensions – Floor Space Requirements 94D x 153W” 2388D x 3877Wmm
Dimensions – Shipping 88D x 117W x 90″ H 2235D x 2972W x 2286mm H
Machine Weight 10000 lbs 4845 kg
Electrical Requirements 208-240V, 50A, 50/60Hz, 3Ph
Air Requirements 1 cfm @ 90 psi 28 l/min @ 6 bar
Paint Color Code RAL9002 (Grey White)

List below is a sample of the many Fixtures and Accessories available. Please refer to a brochure, speak with your local Representative or contact us direct for more information.Automatic 4th Axis Block Roll Over Fixture Rottler’s Universal Quick Load/Unload Automatic Rotate 4th Axis Fixture and Software allows the computer to rotate the block or cylinder head during the automatic machining cycle. Large V blocks can be rotated 360 degrees to allow special machining jobs such as stroker clearancing in same set up as boring, surfacing and lifter bore machining. The tail stock is pneumatically operated allowing easy and fast loading and unloading of heavy blocks.Connecting Rod Fixtures Rottler’s patented Connecting Rod Fixtures allow large connecting rods to be surfaced and bored on the EM79 machines. The Rottler boring fixtures allow both big end and small end to be bored in one set up resulting in perfect parallelism between big end and small end. All the rods in a set can be accurately bored for equal center to center distance, a must for today’s high compression diesel engines. Special heavy duty fixtures available for boring very large, heavy connecting rods found in natural gas compressors and workboat marine engines are available.Dual Axis Leveling Table Rottler’s patented dual axis leveling table and universal quick clamping system for surfacing/milling heads, blocks and manifolds with CBN and PCD tooling. The Rottler Dual Axis Leveling Table allows clamping of the head to be complete first, then the level adjusted in both directions simply by rotating the two hand wheels. Combined with Rottler’s Dual Axis Level, any job can be clamped and leveled in seconds! This process results in minimum stock removal when surfacing.