DRX-750 Manual/CNC Hybrid Engine Block Machine

CNC accuracy with the familiar control and affordability of a manual machine

Offering more features and a better value than any other "manual" machine available today, the 4-axis DRX-750 is as close as you can get to full CNC at a fraction of the price. We have combined a rigid box-way frame, inverter duty dual-range spindle, 3-axis power feed, programmable 4-axis touch screen DRO with summing of the quill, and a 250mm CNC rotary block fixture with programmable indexing CNC control. And because it's a CENTROID, the DRX-750 comes complete with a comprehensive tooling package, personalized on-site training, and the industry-leading service and support you need to be successful.

Quick links: DRX-750 Brochure (PDF) | Request a quote or in-person demo | Find your local representative

Overview
Features
Specs
Videos

DRX-750 Engine Block Machine at PRI 2009

DRX-750 Turnkey Package Includes:

Rigid box-way manual machine
4-axis touch-screen digital readout
Programmable 4th axis CNC rotary indexing controller
Universal CNC block fixture
Comprehensive tooling package
On-site personalized training
Industry's best warranty & support

The DRX-750 will blueprint an engine block faster and more accurately than the competition. CENTROID has made advancements to the machine, the block fixturing and the CNC control that allow you to produce accurate race winning cylinder blocks quickly and easily.

Huge time savings in blueprinting and setup with CENTROID's patented electronic touch probe which will determine the locations, diameters and angle of any feature on the block.Unique to this machine is its ultra accurate rotary table electronic position confirmation. This allows you to rotate the block anyway and anytime and be confident that you can position the block exactly where you want it.

Included Standard Tooling Package

CENTROID includes a high quality tooling package with each machine to get you up and running quickly!

Cylinder boring tool
Tool setting micrometer
12" deck surfacing tool
Lifter boring tool
Lifter spot-facing tool
Cylinder chamfering tool
Main cap conversion tooling

Block Blueprinting and Probing

Blueprinting any block begins by making very accurate measurements of the existing features so corrections can be made. The old way of laborious manual measurement has been eliminated. The CENTROID DRX-750 block machine can be equipped with a high tech digitizing probe which will automatically locate and measure cylinder bores (diameters, locations and angles), deck heights, lifter bores and more!. To measure an entire block, simply choose the features to blueprint, move the machine to that location and the probe measures the block and displays the actual diameters and positions of the cylinder bores (and other features) you can then compare it to the factory specs. The operator then chooses to make any modifications necessary.

The CENTROID DP-4 Probe is a state of the art, made-in-USA highly precise probe which can detect in all axis and directions. Since the probe is made by CENTROID the entire probing system is integrated and streamlined into the DRO, making block probing a quick and simple process.

Simple probing with touch-screen DRO

With the CENTROID touch probe, part and fixture setup has never been easier or more accurate on a manual machine. The DRO's canned probing cycles allow you to quickly find bore centers, measure deck heights, verify deck angles, and more.

Probe with DRO dramatically increases speed and precision of block setup, blueprinting, and machining.

The combination of CNC-like capabilities in and easy-to-use manual machine allows you to quickly produce CNC-quality blocks.

Engine Block Cylinder Boring

Machine both cylinder banks with the same setup. Bore on probed centers, Blueprint or any other specified location. Specialized boring tooling included. Quick, simple operation gets the job done accurately the first time.

Engine Block Surfacing

With a quick push button tool change the machine will surface the block to the exact deck height specified. The probe automatically detects the block existing surface height at multiple locations so the operator can choose the proper surface depth to machine to for a perfectly flat and square deck to the cylinder bore. Specialized block surfacing tooling is included which produces incredibly smooth surfaces for superior gasket performance.

Spot Facing

Spot Face Lifter bores with ease. Easy tool positioning, simply crank the handle to the next location, see the tool position on the screen at all times.

Lifter Bore Machining

Machine lifter bores to the exact diameter, location and angle needed with one simple setup. True up the stock size and location or bore complete new diameter, location or angle. Easily control feed and speed. See on the screen exact position of the tool at all times.

4-Bolt Main Bearing Cap Conversion

The best way to accurately convert a block to 4 bolt mains. The digital read out shows the tool position so you can check your work as you go. Position the block at any angle with the CNC rotary table which remembers the programmed angles and will repeat to that position with a button press. Angle drilling and tapping are perfect for 4-bolt main conversions.

Cylinder Bore Chamfering

Simple positioning of chamfer tool allows the operator to machine chamfers perfectly concentric with bore, to precise uniform depth on all cylinders.

O-Ring Grooving*

Add O-ring grooves the deck of any block. The operator can easily change o-ring diameter, depth and width. DRO position read out ensures accurate positioning.

* O-ring tooling is optional.

Machine Specifications
Table size	16" x 54" (406 x 1372mm)
Longitudinal travel (X)	40" (1016mm)
Cross travel (Y)	18" (457mm)
Vertical travel (Z)	34" (838mm)
Manual quill travel	6" (152mm)
Spindle nose to table top	38" (965mm)
Spindle center to column	21" (533mm)
Maximum table load	2640lbs (1200kg)
Spindle power	7.5HP (5.6kW)
Spindle taper	CAT40
Spindle speed	6,000 RPM
Transmission of spindle and motor	2-speed (Hi/Lo) Inverter Duty
Power feed (X,Y,Z)	0.2 - 47 IPM variable, 95 IPM rapid
Resolution	0.0002" (0.006mm)
Lubrication pump	1/8 HP (94w)
Power requirement	50-60Hz, 220v, 1 or 3 phase
Air requirement	90-100 PSI, 6.2-6.8 Bar
Machine footprint	122"W x 78"L x117"H (3100 x 1981 x 2972mm)
Shipping footprint	91"W x 84"L x108"H (2312 x 2134 x 2744mm)
Weight	5,280 lbs (2400kg)
Boring diameter range*	0.984" - 1.26" (25-32mm), 2.68" - 5.91" (68-151mm)
Boring depth (max)*	9.5" (242mm)*
Milling width (max)*	12" (305mm)*
	* as equipped with standard tooling

Machine Features:

7.5HP 6000RPM inverter duty spindle
+/-90° tilting head for milling/boring at any angle
Variable power feed with rapid on all axes
Manual handwheels on all axes
IP67, fully submersible glass-free linear encoders on all axes (.0002" accuracy)
Included coolant system
Meehanite cast iron box-way frame
Full 6" of quill travel
Z-axis summing of the quill
Probe-ready DRO

See the DRX-750 in action!

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