MUR Series Solid Carbide Micro Profiling Bars for Internal Profile Machining

Solid carbide MUR micro profiling bars for precision machining of internal contours, shoulders, chamfers and radiused transitions in small-diameter bores. Standard models feature a 90°/22° compound profiling geometry, with cutting diameters from Ø2.8 to Ø7.9 mm. Custom dimensions, coatings, OEM marking and private-label support are available.
Substrato:Fine-Grain Solid Carbide
Tipo de ferramenta:Micro Internal Profiling Bar
Série:MUR
Profile Geometry:90° / 22°
Diâmetro de corte:Ø2.8–Ø7.9 mm
Diâmetro da haste:Ø4 / Ø5 / Ø6 / Ø8 mm
Clearance Length:10 / 15 / 22 mm
Custom Options:Dimensions / Profile Geometry / Coating / Marking
Standard Dispatch1–3 Working Days
OEM & CustomDrawings / Samples
Minimum OrderMOQ 10 Pieces
Get a Quote Chat On WhatsApp

Consistent Quality

Consistent geometry across repeat orders.

Pedidos flexíveis

Small batches and mixed sizes available.

OEM Support

Custom marking, labels and packaging.

Padrão e personalizado

Standard sizes and custom configurations.

MUR Micro Profiling Bar Overview

The MUR Series is a precision-ground solid carbide micro profiling bar designed for internal profile machining in small-diameter bores. Its 90°/22° compound cutting geometry supports controlled machining of internal contours, shoulders, chamfers, radiused transitions and other confined internal features.

Standard models cover cutting diameters from Ø2.8 to Ø7.9 mm, nose radii from R0.10 to R0.20 mm and clearance lengths from 10 to 22 mm. The one-piece carbide construction provides the rigidity required for dimensional consistency and fine surface finishing in CNC lathes and Swiss-type machines.

Key Product Features


• Internal Profile MachiningDesigned for machining internal contours, profile transitions, chamfers, shoulders and radiused features in small bores.

• 90°/22° Compound GeometryThe defined profiling geometry provides access to multiple internal surfaces while maintaining controlled tool clearance.

• Fine-Grain Solid CarbideOne-piece carbide construction provides rigidity and helps reduce deflection during miniature internal profile turning.

• Precision-Ground Cutting EdgeControlled nose radii from R0.10 to R0.20 mm support consistent profile dimensions and fine surface finishing.

Aplicações típicas

Aplicativo Machining Purpose
Internal Profile Turning Machining compound contours and profile transitions inside small-diameter bores.
Internal Chamfering Producing controlled chamfers and angled transitions at internal features.
Shoulder Finishing Finishing internal shoulders and adjacent bore surfaces where tool clearance is restricted.
Radius and Transition Finishing Machining radiused transitions and blended internal profiles in precision-turned components.

Micro Internal Machining Methods

Micro boring grooving threading and internal profiling machining methods

Recommended Workpiece Materials


Best ApplicationCarbon steel, alloy steel, stainless steel and copper alloys.

Suitable ApplicationPre-hardened steel, hardened steel below approximately 48 HRC, cast iron and titanium alloys. Application-specific coated versions are available for titanium and other difficult-to-machine materials.
MUR solid carbide micro profiling bar material application guide

Compatibilidade de máquinas

CNC Turning Centers
Precision internal contouring and finishing.
Swiss-Type Lathes
Small precision parts and high-volume production.
Automatic Lathes
Repeatable internal profile machining.
Precision Manual Lathes
Prototype and small-batch profile turning.

Product Detail Photos

MUR Series solid carbide micro profiling bars
MUR solid carbide micro profiling bars
MUR micro profiling bar cutting edge detail
Precision-ground profile cutting edge
MUR Series internal profiling bar tool structure
MUR Series Solid Carbide Micro Profiling Bars package photoMUR tool structure and profile geometry

Product Video

Selection Recommendation

Select the MUR model according to cutting diameter d1, nose radius R, required profile depth Q, clearance length L1, shank diameter D and overall length L. Verify the complete cutting and retraction path against the component drawing. Use the shortest practical clearance length and the largest compatible shank diameter to maximize rigidity.

MUR Series Specifications

The MUR Series includes solid carbide micro profiling bars for precision internal contour machining. Standard sizes cover cutting diameters from Ø2.8 to Ø7.9 mm, with clearance lengths from 10 to 22 mm. All dimensions shown below are in millimeters.

Model Designation

MUR49R015L220550
Código Meaning Example Value
MUR Tool series Micro internal profiling bar
49 Cutting diameter d1 Ø4.9 mm
R015 Nose radius R R0.15 mm
L220 Clearance length L1 22 mm
550 Shank diameter D and overall length L Ø5 mm shank, 50 mm overall length

Custom and special-profile tools may use a different model code. Confirm the approved production drawing before ordering a non-standard tool.

Dimension Definitions

Symbol Dimension Descrição
d1 Cutting Diameter Diameter represented by the cutting edge and used to identify the MUR model size.
R Nose Radius Cutting-edge radius used for forming and finishing internal profile transitions.
Q Profile Cutting Depth Catalog cutting-depth dimension for the specified profiling geometry.
L1 Clearance Length Reduced-neck length available for reaching the internal machining position.
D Diâmetro da haste Nominal cylindrical shank diameter used for toolholding.
L Comprimento total Total tool length from the cutting edge to the end of the carbide shank.

Profiling Geometry

90° GeometrySupports internal shoulder, face-transition and profile machining within the permitted tool path.
22° Approach GeometryProvides clearance for angled internal profile passes and blended contour transitions.
Rounded Cutting TipStandard R0.10–R0.20 mm nose radii support smooth profile generation and controlled edge strength.

Dimensions and Standard Sizes

Click the dimension chart to open the full-size image.

Standard Model Range

Modelo d1 R Q L1 D L
MUR3.0 2.8 0.10 0.50 10 / 15 4 50
MUR4.0 3.9 0.10 0.60 10 / 15 4 50
MUR5.0 4.9 0.15 0.80 15 / 22 5 50
MUR6.0 5.9 0.20 1.00 15 / 22 6 50
MUR8.0 7.9 0.20 1.20 22 8 60

Specification Range Summary

Cutting Diameter d1Ø2.8–Ø7.9 mm
Nose Radius RR0.10–R0.20 mm
Profile Depth Q0.50–1.20 mm
Clearance Length L110–22 mm
Shank Diameter DØ4 / Ø5 / Ø6 / Ø8 mm
Overall Length L50 / 60 mm

Selection Guidance

1. Confirm the Complete ProfileCheck the internal diameter, profile form, shoulder position, angles, radii and required surface finish.
2. Check Tool ClearanceVerify the tool entry, cutting movement and retraction path against the complete component geometry.
3. Minimize Clearance LengthChoose the shortest L1 capable of reaching the profile to reduce deflection and improve dimensional control.
4. Confirm the Nose RadiusThe selected nose radius must be compatible with the smallest radius and transition shown on the component drawing.

Recommended Starting Conditions

  • Set the cutting edge accurately on the spindle centerline.
  • Use the shortest practical overhang and a high-precision toolholder.
  • Verify the tool path before machining shoulders or recessed profiles.
  • Begin with a conservative feed and profile depth, especially on long-reach models.
  • Apply suitable coolant or air flow to remove chips from the bore.
  • Reduce cutting load if chatter, profile deviation or poor surface finish occurs.
  • Adjust the cutting parameters according to material, coating, machine rigidity and bore depth.

Related Micro Internal Tool Series

47° Internal Profiling:MQR Series

Internal Profiling & Boring:MPR Series

General Internal Boring:MTR Series

Back Turning:MXR Series

We support distributors, tooling suppliers and industrial partners with flexible OEM and private label solutions for micro internal tooling products. From laser marking and customized packaging to product identification and technical documentation, we help customers build their own tooling product lines with reliable manufacturing support.

OEM Product Scope

We provide OEM and private label manufacturing solutions for micro internal tooling products, supporting distributors and tooling suppliers with standard series, customized specifications and drawing-based production.

● Micro Boring Bars

MPR series and customized small-diameter boring tools for precision internal machining and anti-vibration applications.

● Micro Internal Threading Bars

MIR/MIL series with customized thread profiles, dimensions and product identification requirements.

● Micro Grooving Tools

Internal grooving and special groove solutions for miniature precision components.

● Custom Micro Tooling

Non-standard dimensions, special geometries and customer drawing-based tooling solutions are available.

mini boring bars

Opções de personalização

Custom laser marking for micro internal tooling

Laser Marking & Product Identification

Custom logo, model number and product identification marking can be provided according to distributor and brand requirements.

Custom packaging solution for micro tooling

Custom Packaging

Individual packaging, labels and product information can be customized to support reseller sales channels and private brand development.

Technical documentation support for tooling OEM

Technical Documents & Product Support

Support technical drawings, specifications and product information to help distributors promote and manage their tooling products.

OEM Workflow

01. Requirement Review

Confirm drawings, specifications, materials and packaging requirements.

02. Tool Confirmation

Finalize tool design, marking details and production requirements.

03. Sample Approval

Provide samples for testing and approval before batch production.

04. Batch Production

Produce and inspect according to confirmed requirements.

custom cutting tool process hy cutting tools

Private Label Support for Distributors

For distributors and tooling resellers, we provide flexible private label support including customized marking, packaging solutions and product documentation to help establish a professional tooling product range.

We follow strict quality control procedures from raw material inspection to final shipment. Each tool is inspected to ensure consistent dimensions, cutting performance and reliable quality for industrial machining applications.

Processo de controle de qualidade

Quality control inspection for carbide cutting tools
01 Material Inspection

Verify carbide material quality and consistency before production.

02 Precision Grinding Control

Control tool geometry, dimensions and cutting edge accuracy during manufacturing.

03 Cutting Edge Inspection

Inspect edge quality and surface finish to maintain stable cutting performance.

04 Final Quality Inspection

Confirm product specifications before packing and shipment.

Inspection Standards

Inspection Item Purpose
Material Inspection Verify carbide quality and material consistency.
Dimension Inspection Confirm tool size and tolerance requirements.
Cutting Edge Inspection Check edge geometry and surface quality.
Final Inspection Ensure products meet confirmed specifications before delivery.

Packing & Protection

Carbide cutting tool packing and protection

Individual protection and export packaging help prevent tool damage during storage and international transportation.

  • Individual tool protection
  • Product identification labels
  • Batch traceability support
  • Export shipment protection

Production & Delivery Workflow

01

Confirmação do pedido

02

Production Scheduling

03

Quality Inspection

04

Packing

05

Shipment

export packing way hy cutting toolsShipping and payment hy cutting tools end mill drills

Delivery Support

Standard products can usually be shipped within 1–3 working days after order confirmation. Customized products require confirmation according to tool design, quantity and production requirements.

FAQ & Downloads

Product FAQs

What are MUR micro profiling bars used for?
MUR solid carbide micro profiling bars are designed for precision internal profile machining in small-diameter bores. Typical operations include internal contouring, shoulder finishing, chamfering and machining radiused or angled transitions.
What cutting diameters are available?
Standard MUR models cover cutting diameters from Ø2.8 to Ø7.9 mm. Available shank diameters include Ø4, Ø5, Ø6 and Ø8 mm, with clearance lengths from 10 to 22 mm.
What does the 90°/22° geometry mean?
The 90°/22° designation describes the compound cutting geometry shown in the MUR technical drawing. It provides clearance for machining internal shoulders, chamfers and blended profile transitions. The complete cutting and retraction path should be checked against the component drawing.
Which nose radii are available?
Standard nose radii include R0.10, R0.15 and R0.20 mm, depending on the model size. The selected radius must fit the smallest internal radius and profile transition specified on the component drawing.

Selection & Application FAQs

How do I select the correct MUR profiling bar?
Selection should consider cutting diameter d1, nose radius R, required profile depth Q, clearance length L1, shank diameter D and overall length L. Also check the bore entrance, internal shoulder position, profile angles and complete tool retraction path.
What materials can be machined with MUR profiling bars?
Typical applications include carbon steel, alloy steel, stainless steel and copper alloys. Selected tools can also machine pre-hardened steel, cast iron and titanium alloys. Application-specific coated versions are available for titanium and other difficult-to-machine materials.
How can I improve machining stability?
Use the shortest practical clearance length and tool overhang, select the largest shank diameter permitted by the bore, and use a high-precision holder. The cutting edge should be accurately set on the spindle centerline before machining.
Can one MUR tool machine several internal features?
The compound profiling geometry may allow one tool to machine adjacent contours, chamfers, shoulders and radiused transitions when the component geometry provides sufficient clearance. Tool-path simulation is recommended before combining multiple operations.
How should chips be removed from a small bore?
Apply suitable coolant or compressed air toward the cutting zone and avoid allowing chips to accumulate around the internal profile. For recessed features, use controlled passes and retract the tool when necessary to clear chips safely.

Ordering & OEM FAQs

Can you manufacture custom MUR profiling bars?
Yes. Cutting diameter, nose radius, profile geometry, approach angle, cutting depth, clearance length, shank diameter, coating and overall length can be customized according to the component drawing or application requirements.
Can distributors order mixed models or trial quantities?
Yes. Mixed-model requirements and small trial orders can be reviewed according to the selected sizes and available stock. The standard minimum order quantity is normally 10 pieces, subject to final model confirmation.
Is OEM marking and private-label packaging available?
Yes. OEM services can include laser marking, custom model identification, private labels and distributor packaging. Please provide the logo file, marking position and packaging requirements when requesting a quotation.
What information is required for a quotation?
Please provide the standard model or component drawing, bore diameter, complete profile dimensions, machining depth, workpiece material, tolerance, surface-finish requirement, quantity and any coating, marking or packaging requirements.
What is the lead time for MUR profiling bars?
In-stock standard models can normally be dispatched within 1–3 working days after order confirmation. Customized tools require separate lead-time confirmation according to the profile geometry, coating, quantity and inspection requirements.

Recursos técnicos

Catálogo de Ferramentas Internas Micro HY Micro Internal Tooling Catalog (PDF)

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