How does the UBURR work?

  1. Upon insertion, the replaceable and adjustable cutting blade is initially held in the extended position by spring tension, effectively eliminating the burr on the front side of the hole.
  2. As the cutting tool encounters increased feed pressure, surpassing the preset spring tension, the blade automatically retracts while passing through the pilot-hole. The unique geometry of the blade ensures no marring occurs on the inner surface of the pilot-hole.
  3. Upon exiting the pilot-hole, spring tension once again triggers the blade to extend, effectively removing the burr on the back side of the hole during the return stroke.

UBURR cutting recommendations

The table below presents cutting recommendations, outlining initial feed rates and cutting speed for materials group based on ISO 513 and VDI 3323 standards.

 (1) To ensure optimal performance and tool-life under varying conditions:

  • For moderate tool-holder or workpiece stability, consider reducing feed rates by up to 10%.
  • For poor tool-holder or workpiece stability, it’s advisable to decrease feed rates by up to 30%.

Additionally, the operator must ensure the utilization of appropriate coolant media directed to the cutting tip of the blade and right-hand machining (clockwise).

 

HSS Blade

Carbide Blade

HSS or Carbide

 

 

 

ISO

 

 

Material

 

 

Condition

As is

vc

cutting speed (1)

vc

cutting speed (1)

ƒz

cutting feed(1)

 

Recommended

Chip-former

 

 

Coolant

AISI /

SAE /

ASTM

DIN W.-Nr.

Uncoated

m/min.

sfm

Coated

m/min.

sfm

Coated

m/min.

sfm

Coated/Uncoated

mm/t

ipt

 

 

 

 

 

 

 

P

Non-alloy steel

and cast steel,

free cutting steel

<0.25% C

Annealed

1020

1.0044

 

25-45

80-150

 

45-65

100-165

 

60-120

200-360

 

0.08-0.20

0.003-0.008

 

 

PL CHIP FORMER

ML CHIP-FORMER

 

 

 

 

 

 

 

Air / Wet

≥0.25% C

Annealed

1035

1.0501

<0.55% C

Quenched and tempered

1045

1.1201

≥0.55% C

Annealed

1055

1.0535

Quenched and tempered

1060

1.1221

Low alloy

and cast steel

(less than 5% of alloying elements)

Annealed

G92600

1.5028

20-45

65-150

35-65

115-165

50-120

165-395

 

0.08-0.20

0.003-0.008

 

Quenched

and tempered

4130

1.7218

4142

1.2332

5045

1.7006

20-40

65-130

35-55

115-180

50-100

165-330

High alloyed steel,

cast steel and tool steel

Annealed

H13

1.2344

 

15-35

50-115

 

30-50

100-165

 

45-90

150-295

 

0.08-0.15

0.003-0.006

Quenched

and tempered

M33

1.3249

Stainless steel

and cast steel

Ferritic/martensitic

420

1.4021

Martensitic

 

M

 

Stainless steel and cast steel

 

Austenitic, duplex

 

304L

 

1.4306

15-30

50-115

30-55

100-180

50-100

165-330

0.08-0.15

0.003-0.006

PL CHIP FORMER

 

Wet

 

 

K

Gray cast iron (GG)

Ferritic / pearlitic

Class 25

0.6015

20-35

65-115

35-55

115-180

60-120

200-395

0.08-0.25

0.003-0.012

 

PL CHIP FORMER

 

 

 

Air / Wet

Pearlitic / martensitic

Grade H20

036037

Nodular cast iron (GGG)

Ferritic

60-40-18

0.7043

 

30-70

100-230

 

40-90

130-295

 

50-100

165-330

 

0.08-0.20

0.005-0.008

Pearlitic

F33500

0.7050

Malleable cast iron

Ferritic

A47

0.8135

Pearlitic

A220 Class

0.8155

 

 

 

 

 

N

Aluminum-wrought alloys

Not hardenable

5005

3.3315

 

50-70

165-230

 

75-120

245-395

 

100-160

330-525

 

 

 

 

0.10-0.30

0.004-0.012

 

 

PL CHIP FORMER

 

 

 

 

Wet

Hardenable

7075

3.4365

Aluminum-cast alloys

≤12% Si

Not hardenable

518.0

3.3292

Hardenable

515.0

3.3241

>12% Si

High temperature

390

 

 

Copper alloys

>1% Pb

Free cutting

C36000

2.0375

30-60

100-200

45-100

150-330

90-130

295-425

 

Brass

C22000

2.0230

Electrolytic copper

C63000

2.0966

Non metallic

Duroplastics, fiber plastics

Bakelite

 

60-100

195-330

90-150

295-490

180-305

600-1000

Hard rubber

Ebonite

 

 

 

 

S

 

High temperature alloys

Fe based

Annealed

330

1.4864

10-15

33-50

15-35

50-115

40-80

130-260

 

 

0.10-0.20

0.005-0.008

 

PL CHIP FORMER

 

 

 

Wet

Hardened

S590

1.4977

Ni or Co based

Annealed

Incoloy 825

2.4858

Not recommended

10-15

33-50

25-40

80-130

Hardened

Inconel 718

2.4668

Cast

Nimocast K24

2.4674

Titanium alloys

Pure

Titanium G.1

3.7024

10-15

33-50

15-20

50-65

30-60

100-180

Alpha+beta alloys, hardened

Titanium G.5

3.7165

 

 

 

 

H

 

 

Hardened steel

 

Hardened

 

HARDOX 500

 

 

 

 

Not recommended

10-20

10-20

30-65

30-50

30-50

100-165

 

 

 

0.04-0.06

0.0015-0.0024

 

ML CHIP-FORMER

 

 

 

 

Air

Hardened

HARDOX Extreme

 

10-15

30-50

30-40

100-130

Chilled cast iron

Cast

A532 lllA 25% Cr

0.9650

15-20

50-65

45-50

145-165

Cast iron

Hardened

A532 IID 20% CrMo

0.9645

10-20

30-65

30-50

100-165

 

 

 

C

Carbon Fiber reinforced plastics (CFRP)

 

 

 

Cured

 

 

 

 

Not recommended

90-140

295-460

 

 

0.05-0.25

0.002-0.010

 

PL CHIP FORMERRecommended with special diamond coating or DLC

 

 

 

Air / Wet

Glass Fiber reinforced plastics (GFRP)

90-350

295-1150

(1) To ensure optimal performance and tool-life under varying conditions:

  • For moderate tool-holder or workpiece stability, consider reducing feed rates by up to 10%.
  • For poor tool-holder or workpiece stability, it’s advisable to decrease feed rates by up to 30%.

Machining guidelines

  1. Tool Rotation and Coolant: The UBURR family of tools is suitable for right-hand machining with clockwise tool rotation and should be used with external coolant to flush away chips and swarf from the cutting zone, as shown in Figure 1. 
  2. Maximum Slope Angle (α°):
    • For inclined surfaces, as shown in Figure 2, the maximum UBURR operation slope angle depends on the tool-holder diameter. This  parameter can be found in the UBURR tool-holders tables parameters under the “Max. Slope Angle” column.
    • For special diameters not listed in the table, please calculate the maximum slope angle using this formula:

 

 

    • This  parameter can be found in the UBURR tool-holders tables parameters under the Ød range for pilot hole  column with the “min.” value to be considered for “d” in the formula above.
    • For Tubes, as illustrated in Figure 3, it is important to ensure the tool diameter is appropriate for the application according to this formula:

COOLANT
Figure 1
Max. Slope Angle
Figure 2
Tube Max. Slope Angle
Figure 3

Programming guidelines

Performing front and back deburring

You can utilize our parametric post routine for milling machines or turning machines to be inserted after each drilling operation:

#101-TOOL LOCATION START

#102-S-CUTTING SPEED, ACCORDING TO CUTTING RECOMMENDATIONS

#103-H1-PILOT HOLE LENGTH

#104-LTB1, ACCORDING TO ITEM TABLE LIST

#105-LTB2, ACCORDING TO ITEM TABLE LIST

#106-RAPID LINEAR FEED FOR POSITION THE TOOL

#107-WORKING CYCLE FEED, ACCORDING TO CUTTING RECOMMENDATIONS

Performing back deburring:

This case involves a different procedure when front deburring is unnecessary. 

In such cases, the tool-holder enters the hole without rotating and begins the linear feed only after passing through the pilot hole. Once the tool has passed through the pilot hole, it retracts to execute the back deburring operation:

For performing back deburring, you can also utilize our parametric post for milling machines or turning machines to be inserted after each drilling operation with the same parameters:

#101-TOOL LOCATION START

#102-S-CUTTING SPEED, ACCORDING TO CUTTING RECOMMENDATIONS

#103-H1-PILOT HOLE LENGTH

#105-LTB2, ACCORDING TO ITEM TABLE LIST

#106-RAPID LINEAR FEED FOR POSITION THE TOOL

#107-WORKING CYCLE FEED, ACCORDING TO CUTTING RECOMMENDATIONS

Performing Deburring by Helical Interpolation 

UBURR can perform deburring through helical interpolation, which not only saves on extra tooling costs but also streamlines the production process by integrating multiple functions into one tool.

Controlling the chamfer size on the workpiece pilot hole
  • The chamfer achieved typically ranges between 0.2mm to 0.5mm (0.008 inches to 0.020 inches). 
  • The main factor influences the size of the chamfer is the tool selection.
  • If the pilot hole diameter is closer to the minimum recommended pilot hole diameter of the tool (as shown in the item list table) the chamfer size is bigger and Vise-versa.
  • For instance, using the UBS-d060-C08-H53-L115 tool (SKU UB3006) and a pilot hole with a diameter of Ø6.0mm (.236”) will yield a larger chamfer compared to a pilot hole with a diameter of Ø6.5mm (0.256”).
Tool selection

Accessibility Toolbar