UBURR TECHNICAL INFORMATION

Technical Information

How does the UBURR work?

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.
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.
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 blade recommendations

Blade Removal

Remove the blade: Unlock the screw using a 0.05 inch Allen key with a counterclockwise turn of the locking screw.
Push the blade by hexagon key through.
Pull up the blade from the holder.

Blade Insertion

Insert the blade into the holder slot.
Push the blade into the tool pocket.
Lock the screw clockwise.

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		v_c cutting speed ⁽¹⁾		v_c cutting speed ⁽¹⁾	ƒr 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/rev ipr
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	60-120 200-390	0.08-0.20 0.003-0.008		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 80-150	35-65 115-165	50-120 165-390	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			Austenitic, duplex	304L	1.4306	15-30 50-100	30-55 100-180	50-100 165-330	0.08-0.15 0.003-0.006		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		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		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		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	30-50 100-165	0.04-0.06 0.0015-0.0024		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	Recommended 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

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.
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:

Using the UBURR with electric hand drills:

UBURR is compatible with both CNC machines and electric hand drills, making it suitable for various operational setups and maximizing the manufacturing process.

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 Interpolation

UBURR can perform deburring through 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 and the feed.
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”).
Another option to control the chanfer size is by adjusting the feed rate. Increasing the feed rate (Vf) will decrease the chamfer size, and vice versa.