Reliable Modular Deep Hole Drills Manufacturer for Precision Machining

RONGKE manufactures Modular Deep Hole Drills for large-diameter hole machining in precision engineering, mould making, and other metalworking applications. The MDD system uses a modular design that allows the drill head, pilot, cutting components, extensions, and machine-side connecting shank to be selected according to the required hole diameter, drilling depth, and machine interface.

Unlike a complete drill supplied as one fixed assembly, a modular deep hole drilling system requires the connection dimensions and cutting components to work together. RONGKE offers MDD drill heads, YXZ extensions, DXZ connecting shanks, and compatible cutting components to help machining companies source the parts needed for new tooling setups and replacement requirements.

For buyers comparing modular deep hole drills, the main selection factors are the drilling diameter range, adjustment capability of the selected head, pilot configuration, connection dimensions, and required working reach. Confirming these details before ordering helps avoid mismatched components and unnecessary changes to the tooling assembly.

MDD Modular Deep Hole Drill Product Range

RONGKE Modular Deep Hole Drills cover several components within the MDD system. Each component serves a specific function, so buyers can identify the required part instead of treating every item as a complete drill.

MDD Modular Deep Hole Drill Heads

The MDD drill head is the main cutting assembly for large-diameter holes. Its configuration includes a central pilot and inner and outer cutting components. The catalog specifies 0–5 mm diameter adjustment within the applicable head group, allowing the selected head to be set within its specified range.

Buyers should confirm the required hole diameter, head model, cartridge references, and pilot arrangement before purchasing replacement parts or a complete assembly.

YXZ Modular Deep Hole Drill Extensions

YXZ extensions provide additional reach between compatible modular drilling components. Standard listed lengths are 200, 300, 400, and 500 mm.

Selection depends on the locating diameters at both ends, the applicable MDD head group, and the required assembled configuration. For example, YXZ-3016200 specifies D 30 mm, D1 16 mm, and L 200 mm.

DXZ Machine-Side Connecting Shanks

DXZ connecting shanks connect the modular drilling assembly toward the machine side. Listed lengths range from 100 to 500 mm in 50 mm increments.

Although some DXZ and YXZ lengths overlap, their functions and interfaces differ. Buyers should select the correct component by connection type and dimensions, not by overall length alone.

Pilot Drills and Replacement Cutting Components

Compatible pilot drills, inner and outer cartridges, and cutting inserts are selected according to the MDD head specification. These components have different functions and should be identified separately when ordering.

For replacement purchases, providing the existing head model and component references helps establish the correct fit before a quotation is issued.

Specifications

The following information summarizes the main selection references in the RONGKE MDD catalog. Final compatibility should be checked against the relevant model table and assembly requirements.

How to Select Modular Deep Hole Drills

Choosing the correct MDD configuration starts with the machining requirement, not simply the tool's overall length or nominal diameter. The following details help buyers narrow down a suitable combination.

1. Match the Drill Head to the Required Hole Diameter

Identify the target finished-hole diameter and select the corresponding MDD head group. Where diameter adjustment is required, verify the adjustment range listed for that specific model.

For example, the MDD-045050 is listed for a Ø45–50 mm adjustment interval. The catalog's 0–5 mm adjustment specification applies within the relevant head group, rather than across the entire product range.

2. Check the Pilot and Cutting Components

The pilot, inner cutting component, and outer cutting cartridge perform separate roles in the drilling assembly. Their references must match the selected head.

For replacement orders, provide the MDD model and the existing pilot or cartridge code where available. If the pilot projection is critical to the application, use the applicable catalog table for the required diameter and depth class rather than selecting by total pilot length alone.

3. Select the Correct Extension or Connecting Shank

The YXZ extension and DXZ connecting shank should not be treated as interchangeable parts.

Choose YXZ when additional reach is required between compatible modular components.

Choose DXZ for the machine-side connection.

Confirm both locating diameters, the applicable head group, and the required length before ordering.

The correct combination depends on the interfaces and assembly layout, even when two components share the same nominal length.

4. Confirm the Complete Assembly

Before production use, check the head, pilot, cutting components, extension, and connecting shank as one assembly. Relevant checks include locating-diameter accuracy, joint seating, assembled runout, adjustment locking, and coolant continuity where applicable.

If the drilling setup has specific dimensional tolerances or inspection requirements, include them in the purchase specification so they can be reviewed before order confirmation.

Applications of Modular Deep Hole Drills

Mould and die manufacturing: Deep-hole and large-diameter hole machining for mould components and related tooling.

Precision machinery: Hole-processing operations requiring a defined drilling diameter and compatible tool interfaces.

Engineering machinery: Machining metal components according to specified hole dimensions and production requirements.

Energy equipment manufacturing: Drilling operations for metal parts used in industrial energy equipment.

General metalworking: Applications involving compatible workpiece materials and suitable CNC machine setups.

RONGKE cutting tools are designed for use with materials including carbon steel, stainless steel, aluminium alloy, titanium alloy, superalloy, and cast iron. The appropriate tool configuration and machining parameters depend on the specific workpiece material and application.

Manufacturing and Quality Inspection

RONGKE's manufacturing capabilities include five-axis CNC tool grinding, machining centers, CNC lathes, precision grinding equipment, coating facilities, and heat-treatment equipment. The company also operates an independent laboratory and uses precision inspection instruments to support dimensional and process verification.

For modular deep hole drilling components, inspection requirements should reflect the function of each part. Relevant checkpoints include:

Locating diameters and dimensional accuracy at connection interfaces.

Joint-face condition and component seating.

Cutting-component installation and adjustment locking.

Assembled runout with the intended MDD head and connecting components.

Coolant passage continuity where required by the selected configuration.

Buyers requiring inspection records or specific acceptance criteria should state these requirements when requesting a quotation. This helps align the order specification with the intended tooling assembly.

Frequently Asked Questions

What components are included in the RONGKE Modular Deep Hole Drills range?

The range includes MDD drill heads, YXZ extensions, DXZ machine-side connecting shanks, compatible pilot drills, cutting cartridges, and cutting inserts. The components can be selected according to the required drilling diameter, reach, and connection interfaces.

What is the diameter adjustment range of an MDD drill head?

The catalog specifies 0–5 mm diameter adjustment within the applicable head group. The usable range depends on the selected model, so buyers should confirm the exact interval before placing an order.

What is the difference between YXZ and DXZ?

YXZ is a modular extension used to provide additional reach between compatible components. DXZ is a machine-side connecting shank. Their functions and connection interfaces differ, even where their available lengths overlap.

Can I order replacement parts without purchasing a complete drill assembly?

Replacement inquiries can specify individual components, such as a pilot, cartridge, cutting insert, extension, or connecting shank. Providing the existing MDD model and relevant component codes helps RONGKE verify the requirement.

What information is needed for a quotation?

Provide the required hole diameter, drilling depth, head model, connection dimensions, component list, and order quantity. If the application has specific machine-interface or inspection requirements, include those details in the inquiry.