UBACK TECHNICAL GUIDELINES

UBACK Technical Guidelines

How does the UBackTool works?

The UBack tool-holders are designed for CNC automated operations and are compatible with USPOT inserts for back counterboring and spot-facing, as well as UCHAMF inserts for back countersinking.
The insert’s opening and closing hydraulic mechanism is activated by directing coolant through the spindle and tool-holder. This system supports coolant, emulsion, or air with a minimum pump pressure of 6 bar (90 PSI).
The tool-holder is specifically engineered to prevent scratches while passing through the pilot hole.

UBack Programming guidelines

(1) The Folding Length (FL) parameter is listed in the tool-holder tables and is the same for both USPOT inserts and UCHAMF inserts.

(2) The illustrated operation sequence above demonstrates working with a USPOT insert but remains the same when using a UCHAMF insert.

UBack Tool Insert Replacement

UBack inserts can be easily replaced using just a pin and a screw, without the need for any additional mounting devices.
The pin is used to secure the insert within the tool-holder, preventing it from retracting while unscrewing.
The UBack spare parts, including the screw, key, and pin, are standardized across the entire UBack tool-holder range.

NOTE: The illustrated insert replacement above is demonstrated with a USPOT insert but remains the same when using a UCHAMF insert.

Counterbore Machining Guidelines for Specific Conditions

Counterbore on Cylindrical Bore

Use with Internal Coolant

Counterbore on Sloped Surface

Use external coolant only

Counterbore on Slot

Fully Interrupted Cut
Use external coolant only
Consider reduced stability and adjust cutting parameters by reducing them by 30%

Counterbore on Shoulder

Fully Interrupted Cut
Use external coolant only
Consider reduced stability and adjust cutting parameters by reducing them by 30%

Counterbore on Shoulder

Fully Interrupted Cut
Use external coolant only
Consider reduced stability and adjust cutting parameters by reducing them by 30%

Configuring UBACK tool-holders for different cooling systems

UBACK tool-holders are designed for controlling insert retraction using emulsion, air, or Minimum Quantity Lubrication (MQL) coolant systems. When using air or MQL, seal the tool-holder’s coolant inlet with the supplied BR05006- M5 x 6 mm set screw.

UBack 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).

ISO

Material

Condition

As is
AISI / SAE / ASTM

DIN W.-Nr.

v_c⁽¹⁾

cutting speed m/min.
/sfm

Series B
ƒr⁽¹⁾
mm/t
/ipt

Series C
ƒr⁽¹⁾
mm/t
/ipt

Series D
ƒr⁽¹⁾
mm/t
/ipt

Series E
ƒr⁽¹⁾
mm/t
/ipt

Series Fƒr⁽¹⁾
mm/t
/ipt

Series G
ƒr⁽¹⁾
mm/t
/ipt

Recommended
Chip-former

Coolant

Non-alloy steel
and cast steel,
free cutting steel

<0.25% C

Annealed

1020

1.0044

60-120
/200-390

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.07
/0.0028″

0.08
/0.0031″

0.09
/0.0035″

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

50-120
/165-390

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.07
/0.0028″

0.08
/0.0031″

0.09
/0.0035″

Quenched and tempered

4130

1.7218

4142

1.2332

5045

1.7006

50-100
/165-330

High alloyed steel,
cast steel and tool steel

Annealed

H13

1.2344

40-90
/150-295

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

0.08
/0.0031″

Quenched and tempered

M33

1.3249

Stainless steel and cast steel

Ferritic/martensitic

420

1.4021

Martensitic

Stainless steel

Austenitic, duplex

304L

1.4306

50-100
/165-330

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.07
/0.0028″

0.08
/0.0031″

0.09
/0.0035″

Wet

Gray cast iron (GG)

Ferritic / pearlitic

Class 25

0.6015

60-120
/200-395

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.07
/0.0028″

0.08
/0.0031″

0.09
/0.0035″

Air / Wet

Pearlitic / martensitic

Grade H20

36037

Nodular cast iron (GGG)

Ferritic

60-40-18

0.7043

50-100
/165-330

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

0.08
/0.0031″

Pearlitic

F33500

0.705

Malleable cast iron

Ferritic

A47

0.8135

Pearlitic

A220 Class

0.8155

Aluminum-wrought alloys

Not hardenable

5005

3.3315

100-160
/330-525

0.05
/0.0020″

0.06
/0.0024″

0.08
/0.0031″

0.10
/0.0039″

0.12
/0.0047″

0.14
/0.0055″

Wet

Hardenable

7075

3.4365

Aluminum-cast alloys

≤12% Si

Not hardenable

518

3.3292

Hardenable

515

3.3241

>12% Si

High temperature

390

Copper alloys

>1% Pb

Free cutting

C36000

2.0375

90-130
/295-425

Brass

C22000

2.023

Electrolytic copper

C63000

2.0966

Non metallic

Duroplastics, fiber plastics

Bakelite

180-305
/600-1000

Hard rubber

Ebonite

High temperature alloys

Fe based

Annealed

330

1.4864

40-80
/130-260

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

0.08
/0.0031″

Wet

Hardened

S590

1.4977

Ni or Co based

Annealed

Incoloy 825

2.4858

25-40
/80-130

Hardened

Inconel 718

2.4668

Cast

Nimocast K24

2.4674

Titanium alloys

Pure

Titanium G.1

3.7024

30-60
/100-180

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

0.08
/0.0031″

Alpha+beta alloys, hardened

Titanium G.5

3.7165

Hardened steel

Hardened

HARDOX 500

30-50
/100-165

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

Air

Hardened

HARDOX Extreme

30-40
/100-130

Chilled cast iron

Cast

A532 lllA 25% Cr

0.965

45-50
/145-165

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

Cast iron

Hardened

A532 IID 20% CrMo

0.9645

30-50
/100-165

0.02
/0.0008″

0.03
/0.0012″

0.04
/0.0016″

0.05
/0.0020″

0.06
/0.0024″

(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%.

Coatings Types:

Coating	Key Features	Applications	Industries	Material Examples	ISO GROUP
Coating	Key Features	Applications	Industries	Material Examples	P	M	K	N	S	H
TiAlN	Suitable for mid steels, cast iron, stainless steel, titanium alloys, Inconel, tool steel, and hardened steels. Offers excellent thermal stability, oxidation resistance, and wear resistance.	Ideal for high-speed cutting and general-purpose machining. Performs well in both wet and dry conditions.	Aerospace, Automotive, General Engineering	AISI 304, 42CrMo4, GG (Grey Cast Iron), Ti6Al4V	✓	✓	✓	X	✓	✓
TiAlSiN	Provides exceptional hardness and oxidation resistance, withstanding temperatures above 1,200°C. Suitable for high-strength steels, superalloys, hardened steels (over 45 Rc), and titanium alloys.	Best for high-performance machining in demanding environments. Excels in dry machining at high speeds.	Aerospace, Automotive, Die and Mold	Inconel 718, AISI 4140, Ti6Al4V	✓	✓	X	X	✓	X
AlTiSiN	Offers high hardness, thermal stability, and resistance to wear and oxidation. Suitable for stainless steel, hardened cast, superalloys, and steels over 45 Rc.	Designed for high-speed machining in extreme conditions. Performs exceptionally in dry machining.	Aerospace, Automotive, Precision Engineering	AISI 316, AISI H13, Hastelloy	X	✓	X	X	✓	✓
AlCrN	Provides excellent oxidation resistance (up to 1,100°C), toughness, and abrasion resistance. Suitable for carbon steels, cast iron, stainless steel, and aluminum.	Suitable for general machining in wet and dry environments. Excels in abrasive and high-wear applications.	Automotive, Aerospace, Die and Mold	AISI 304, AISI 1045, GG, AL6061	✓	X	✓	✓	X	X
AlTiN	High hardness, wear resistance, and thermal stability up to 1,100°C. Designed for mid steels, cast iron, high-speed steels, tool steel, and hardened materials.	Ideal for heavy-duty machining and high-speed cutting. Performs well in dry and abrasive conditions.	Aerospace, Automotive, Heavy Engineering	AISI 4340, M2 HSS, GG (Grey Cast Iron)	✓	✓	✓	X	X	X
TiB2	Known for exceptional chemical stability, low friction, and high thermal conductivity. Best for machining non-ferrous materials such as aluminum, copper, brass, and magnesium alloys.	Optimized for high-speed machining of non-ferrous metals. Prevents material adhesion and improves efficiency.	Aerospace, Automotive, Electronics	AL7075, 6061-T6, Copper, Magnesium Alloys (AZ31)	X	X	X	✓	✓	X