NORITAKE CO., LIMITED
Grinding wheel, Dresser, Coolant□Domestic Sales Locations■INDUSTRIAL PRODUCTS GROUP SALES DIVISION
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-9833■WESTERN JAPAN BRANCH
2-29 Minamisenrioka, Settsu, Osaka 566-0021 Japan
Tel +81-6-6319-1161■EASTERN JAPAN BRANCH
1-13-8 Toranomon, Minato-ku, Tokyo 105-8502 Japan
Tel +81-3-6205-4433■OVERSEAS SALES DEPT.
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-9837■CENTRAL JAPAN BRANCH
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-7226□Global Manufacturing and Sales Locations■NORITAKE CO., INC.
Cincinnati Branch4990 Alliance Dr., Mason, OH 45040, U.S.A.
Tel +1-513-234-0770■NORITAKE EUROPA GmbH.
Atlanta Branch
490 Sun Valley Dr., Suite#102
Roswell, GA 30076, U.S.A.
Tel +1-770-518-8233

Kurhessenstrasse 3, D-64546
Mörfelden-Walldorf, Germany
Tel +49-61-05-2092-44■NORITAKE SHANGHAI TRADING CO., LTD.
Shanghai Headquarter
Room 701 Aetna Tower No.107, Zun Yi Road,
Chang Ning District, Shanghai, 200051, China
Tel +86-21-6237-5667

Guangzhou Branch2510 Goldlion Digital Network Centar, 138
Tiyu Road East, Guangzhou 510620, China
Tel +86-20-3877-2253

Dalian Branch
22K, International Finance Building,
No.15 Renmin Road Zhongshan
Dist Dalian 116001, China
Tel +86-411-825-06065■NORITAKE SA (THAILAND) CO., LTD.
Bangkok Ofﬁce
388 Amigo Tower, 17th Floor, Zone A/1, Siphraya Rord,
Mahapruetaram, Bangrak, Bangkok, 10500, Thailand
Tel +66-2-235-1688

Filtration■ Fluid & Machine Technology Dept.

Filtration System Section
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-4268

WebsiteContact us

Distributed by

The contents are subject to change without notice.

21122000SK

Grinding Solutions
For Automotive Engine
Manufacturing Processes

Grinding Solutions For Automotive Engine Manufacturing Processes

EngineCamshaftEngine valve

Cylinder blockTransmission

Gear
Crankshaft

01

Connecting rod

02

Grinding Solutions For Automotive Engine Manufacturing Processes

Issues and Proposals for Improvement of Automotive Engine Manufacturing Processes
Crankshaft

Camshaft❶ Journal grinding❶ Journal grinding❷ Camlobe grinding① Journal grinding(simultaneous grinding)② Camlobe grinding❷ Pin grinding① Journal grinding

Aspects

Process③ Grinding OD and side face

Multiple grinding locations

Long grinding wheel
replacement time

Insufﬁcient coolant
at grinding point

Large contact area between
grinding wheel and workpieceMultiple grinding locations

Long grinding wheel
replacement time

Grinding heat can accumulate due
to large contact area

It takes too much timeto grind

Improving grinding wheel life
to reduce wheel changing time

Grinding burn

Grinding burn on side faceLong grinding time

Improving grinding wheel life
to reduce wheel changing time

Grinding cracks
and residual stress

Proposal

Proposal

Proposal

Proposal

Proposal

Proposal

Proposal

One grinding
processΣ wheel(CBN wheel)

Two grinding
processes

Product Description
P.15

Rough Grinding
Process

Standard
speciﬁcations:
SD 40 Q 90 MW7

CX grinding wheel(Conventional grinding wheel)
Standard speciﬁcations:
CX 60 L 8 V104

Filtration

Coolant

Metal bond rotary
dresser03

V35

VN1 (CBN wheel)(Conventional grinding wheel)

Standard speciﬁcations:
CB 100 M 180 VN1Standard speciﬁcation
Front portion: SK 60 J 8 V35
Rear portion: SK 60 H 10 V35P

Sharp Kaiser(CBN wheel)

CX grinding wheel

V35, V57(Conventional grinding wheel)(Conventional
grinding wheel)
Standard speciﬁcation
For smaller OD size
wheel: SH 60 L 8 V35
For larger OD size wheel :SH 60 L 9 V57XP■Grinding FCD materials

Standard speciﬁcations:
CX 60-8 V104

LL Blade dresser
Standard speciﬁcations:
L3T1-0803

Metal bond rotary
dresser

Product Description P.11
Standard speciﬁcations:
CBX 120 Q 180 VSH1

Finish grinding process■Wheel Outer diameter φ250 to
350mm

Sharp Kaiser (CBN wheel)
Product Description P.11
Standard speciﬁcations:
CBX 120 Q 180 VSH1
■Wheel Outer diameter φ150mm
or less (concave cam)■Grinding FC chillmaterial

SW5 (CBN wheel)

Mega Life Wheel (CBN Wheel)

Standard speciﬁcations:
CB 80 O + 200 VSW5Standard speciﬁcations:
CBX 120 Q 180 VML1

Standard speciﬁcations:
SD 40 Q 90 MW7

LL Blade dresser

Noritake Cool

Noritake Cool

Noritake Cool

■SEC-Y(water base coolant)
Better suited for
Lubricity■NK-Z(L)(water base coolant)
Better suited forcorrosion prevention

Noritake Cool

Noritake Cool

■SEC-Y(water base coolant)
Better suited for Lubricity■NK-Z(L)(water base coolant)
Better suited for corrosion
prevention■SEC-Y(water base coolant)
Better suited for
Lubricity■NK-Z(L)(water base coolant)
Better suited forcorrosion prevention■SEC-Z(water base coolant)
Better suited for Lubricity■NK-Z(L)(water base coolant)
Better suited for corrosion
prevention■SEC-Z(water base coolant)
Better suited for Lubricity■NK-Z(L)(water base coolant)
Better suited for corrosion
prevention

Epoch separator

Epoch separator

Epoch separator

Epoch separator

Epoch separator

Standard speciﬁcations:
SD 40 Q 90 MW7Standard speciﬁcations:
L3T1-0803

This icon shows that products were published in the Technical Information magazine NORITAKE TECHNICAL JOURNAL.
Shown next to the icon is the publications page number.

Grinding wheel with dresser

Standard speciﬁcations:
CB 100 M 180 VN1

Vol.1

Coolant

Metal bondrotary dresser

SW5 (CBN wheel)
Standard speciﬁcations:
CB 80 O + 200 VSW5

Filtration

Grinding wheel with dresser

Standard speciﬁcations:
CBX 120 M 180 VV2 (Σ)

VN1 (CBN wheel)

Aspects② Pin grinding① Journal grinding

Issues① Journal grinding(simultaneous grinding)IssuesProcess

d face side
❸ Grinding OD and04

Grinding Solutions For Automotive Engine Manufacturing Processes

Issues and Proposals for Improvement of Automotive Engine Manufacturing Processes
En gin e va lve❶ Cutting❸ Groove grinding❹ Face grinding

Process

Form loss due to workpie
workpiece
shape complexity

Grinding wheel wear and form loss

Short wheel life

Inconsistent workpiece accuracy

Deterioration of groove shape,
deterioration of surface roughness

Deterioration of surface roughness,frequent shape and cutting ability maintenance

Proposal

Proposal

Proposal

Proposal

VN1(CBN wheel)

Metal bondrotary dresser

Standard speciﬁcations:
CB 100 N 200 VN1Standard speciﬁcations:
SD 40 Q 90 MW7

Rim saw

Electroplated wheel

Standard speciﬁcations:
CB 80 to 100 MRX27

Standard speciﬁcations:
CB 400 PC5 (Standard type)
CB 120 PC5 (Truing type)SK and GC
grinding wheels(Conventional grinding wheel)

Standard speciﬁcations:
SD 40 Q 90 MW7

LL Blade dresser NEO

CX grinding wheel

LL Blade dresser NEO(Conventional grinding wheel)

Standard speciﬁcations:
L3T1-0803 N

Noritake cool
SEC-Z
(Water base coolant)

Standard speciﬁcations:
CB 120 N 200 VN1Standard speciﬁcations:
CX 100 P 7 V104

Noritake-cut
EPS-6X(Oil base coolant)

Noritake-cut
EPS-6X(Oil base coolant)

Centrifugal

05

Standard speciﬁcations:
L3T1-0803 N

Filtration

Noritake-cut
EPS-6X(Oil base coolant)

Metal bondrotary dresser

Filtration

Coolant

Standard speciﬁcation
Rough: SK 60 M 8 V35, GC 60 M 8 V81
Finish: SK 100 M 8 V35, GC 100 M 8 V81(CBN wheel)

VN1

Aspects

Grinding wheel wear and form loss

Grinding wheel with dresser

High efﬁciency cutting

Issues④ Face grindingg

Grinding wheel with dresser③ Groove grinding
nding

Coolant② Stem grinding

Aspects① CuttingIssuesProcess❷ Stem grinding

Epoch separator

This icon shows that products were published in the Technical Information magazine NORITAKE TECHNICAL JOURNAL.
Shown next to the icon is the publications page number.

Centrifugal

Centrifugal

06

Grinding Solutions For Automotive Engine Manufacturing Processes

Issues and Proposals for Improvement of Automotive Engine Manufacturing Processes
Connecting rod

Cylinder block❷ Top surface machining❶ Inner diameter grinding of Cylinder②Inner diameter grinding (internal grinding)②Inner diameter grinding (honing)

Aspects

Low ﬂatness and thickness
variation requirements

Must meet cylindricity and surface
roughness requirements

Must meet cylindricity and surface
roughness requirements

Must meet cylindricity and surface
roughness requirements

High Efﬁciency grinding

Stable cutting ability,
preventing grinding burn

Deterioration of surface roughness

Balanced cutting
ability and tool life

Balanced cutting
ability and tool life

Short tool life,
high surface roughness

Proposal

Proposal

Proposal

Proposal

Proposal

Aspects①Width grinding

Issues② Top surface machining

Issues① Inner diameter grindingof Cylinder (honing)

Process❷ Inner diameter grinding

Process❶ Width grindingStandard speciﬁcations:83A 46 J 15 YTS

Standard speciﬁcations:
L1S1-1203N

VN1 (CBN wheel)
Standard speciﬁcations:
CB 170 M 200 VN1Case ofin-feed grinding

Rough grinding

Finish grinding

MKD Series■Non-cast iron

(Diamond Wheel)

MHB Series

MKD Series (Diamond Wheel)

Product Description P.13

(Diamond Wheel)

Grit Ace

Product Description P.13

Standard speciﬁcations:
SD 170 to 400 O 20 MKD

Product Description P.14

(Diamond Wheel)
Standard speciﬁcations:
SD 40Standard speciﬁcation
Rough: SD 270 to 325 M 50 MKD
Finish: SD 400 to 600 M 35 MKD

Flatdy(Conventional grinding
wheel)
Standard speciﬁcations:83A 46 H 12 BHXS1

LL single-point
dresser NEO
Standard speciﬁcations:
L1S1-1203N

Noritake cool
SEC-Y
(Water base coolant)

Epoch separator

07

Standard speciﬁcations:
SD 500 to 2500--MHB

Vol.1■Cast iron

Metal bond rotary dresser

MH5 Series

Standard speciﬁcations:
SD 40 Q 90 MW7(Diamond Wheel)
Standard speciﬁcations:
SD 500 to 2500 H 20 MH5

Noritake cool
SEC-Y
(Water base coolant)

Noritake cut
0091(Oil base coolant)

Filtration

Coolant

LL single-point
dresser NEO

Grinding wheel with dresser(Conventional grinding
wheel)

Epoch separator

Noritake cool
SA-2000CB (K)(Water base coolant)

Noritake cool
ES-20KP(Water base coolant)

Combination Filtration
System

Combination Filtration
SystemFiltration conﬁguration:
Magnetic separator + Paper Filter
ilter

Filtration conﬁguration:
Magnetic separator + Paper Filter
ilter

Coolant

NeoepoxFiltration

Grinding wheel with dresser

Case ofcarrier grinding

A-0 ﬁlter

This icon shows that products were published in the Technical Information magazine NORITAKE TECHNICAL JOURNAL.
Shown next to the icon is the publications page number.

08

Grinding Solutions For Automotive Engine Manufacturing Processes

Issues and Proposals for Improvement of Automotive Engine Manufacturing Processes
Gear

Gear grinding • polishing

Internal
grinding

Periphery andgend face grinding

Large stock removal

Must meet cylindricity and surface
roughness requirements

Grinding wheel diameter is smaller
than workpiece inner diameter

Large contactt area b
betweentgrinding wheel and workpiece

Dressing conditions
that are prone to glazing

Grinding and polishingare possible with
one grinding wheel

Large number of teeth where
grinding wheel and workpiece mesh

Wheel surface loses form,
decreasing cutting ability

Balanced cutting
ability and tool life

Deterioration of surface roughness

Grinding burn on side face

Grinding burn

Reducing grinding time

Short wheel life

Proposal

Proposal

Proposal

Proposal

Proposal

Proposal

ProposalGrinding wheel with dresser

Aspects

Gear grinding + polishing

IssuesGear grinding

Gear honing

Process

Internal grinding

Inner diameter
grinding (honing)

CompleteePeriphery andend face grinding

Aspects

Large gear

CX grinding wheel

Besler Wheel (CBN Wheel)

Rough grinding

Finish grindingStandard speciﬁcations:
CBC 230 P 75 BX331

MIK1 Series

MH5 Series(CBN Wheel)(CBN Wheel)(Conventional grinding wheel)

LL single-point
dresser

LIFE KING

Standard speciﬁcations:CXZ 120 N 8 V104

Standard speciﬁcations:
L1T1-0603

Standard speciﬁcations:
TA 60 J 8 VLK1Standard
speciﬁcations:
L3T1-0803

Gear Ace(for continuous
generation type gear
grinding)
Standard speciﬁcations:
TA 80 I 10 VLK1P

Standard speciﬁcations:Standard speciﬁcations:
CBM 120 to 200 M 50 MIK1 CB 325 to 1000 H 30 MH5

VN1 (CBN wheel)
Standard speciﬁcations:
CB 170 M 200 VN1Noritake cut
0091(Oil base coolant)

VN1

Standard speciﬁcations:
SD 40 Q 90 MW7Standard speciﬁcations: Standard speciﬁcations:
CBX 120 P 150 VN1KP SD 40 Q 90 MW7

Noritake cool
SEC-Y
(Water base coolant)(CBN wheel)

Metal bond rotary
dresserStandard speciﬁcations
Grinding section:
CZ 120 I 10 V700P
Polishing section: A800

Vol.2

Noritake cool
SEC-Y
(Water base coolant)

Gear Ace(for Gear Honing)Standard speciﬁcation
Resinoid-bond grinding wheel:
CXY 100 R 7 Y1605
Vitriﬁed-bond grinding wheel:
MA/SK 100 N 6 V53

Noritake cut
0091(Oil base coolant)

Case of using
oil base coolant

Case of using
water base coolant

Lambda ﬁlter system

Epoch separator

Filtration

Noritake cool
SEC-Y
(Water base coolant)

Metal bond rotary
dresser

Multi-layer gear
grinding wheel

Filtration

Coolant

LL Blade dresser(Conventional grinding wheel)

Combination Filtration System
Epoch separator

09

IssuesWidthgrinding

Inner diameter grinding(honing)

Grinding wheel with dresser

Process

Heat treatment

Width grinding

Coolant

Small gear

Filtration conﬁguration:
Magnetic separator + Paper Filter

A-0 ﬁlter
Epoch separator

This icon shows that products were published in the Technical Information magazine NORITAKE TECHNICAL JOURNAL.
Shown next to the icon is the publications page number.

Epoch separator

Magnetic separator
tank unit

10Grinding Solutions For Automotive Engine Manufacturing Processes

Kaiser is lower than that of the traditional product, which shows that the cutting ability is

Grinding Solution: Cam lobe Grinding

improved. In addition, Fig. 4 compares the grinding results between Sharp Kaiser and the
traditional product when grinding with equivalent power consumption. After dressing bothwheels so that they each produce the same quality, the Sharp Kaizer had held It’s surface ﬁnish

In order for an engine to achieve high power output andFig. 1 Outline of Cam lobe grinding

low fuel consumption, the cam’s concave proﬁle isby 1.9 times longer, and the roundness by 2.9 times longer than the traditional product. The
surface roughness is 12% ﬁner and the residual stress is 75% lower, thus improving the overallbecoming more crucial. Grinding issues, such as grinding

workpiece quality. Sharp Kaizer is able to achieve such long life because of the improved bondcracks and residual stress, are more likely to occur

structure uniformity and the improved cutting ability due to its higher grain protrusion (Fig. 5). In

compared to traditional shapes. In addition, materials that

other case studies, not only does the Sharp Kaizer improve the work ﬁnish quality and reduce

have high strength and toughness, such as ductile cast iron,scratches, but it also increased it’s dressing interval by 1.5 to 2 times compared to the traditional

will be more difﬁcult to grind compared to the gray castproduct.

iron because of the high heat buildup. This issue will lead
into the problem mentioned previously, which will be prone
Fig. 4 Test results

there will be more frequent wheel changes. This will lead to production loss, and end up
wheel for cam lobe grinding that has both high cutting ability and long wheel life. Noritake
would like to introduce Sharp Kaizer as the Vitriﬁed bonded CBN wheel suited for such cam lobe
grinding.

100

Power consumption(index)increasing the cost per part, due to machine down time. We would need to look into a CBN

400

80

60

40

20

Sharp Kaiser (Vitriﬁed-bond CBN wheel)
Feature: Good balance between cutting ability andshows the power consumption of the Sharp Kaiser and the
traditional products. The power consumption of the Sharp

Fig. 3 Power Consumption[Grinding conditions]

Speciﬁcations

CBX140-V

Grinding method

Dimensions

ø350×T35×ø20mm

Grinding wheel speed 140m/s

Dresser

Rotary dresser (SD30)

Coolant

Water base coolant

100Power consumption(index)

FCD700110mm3/mm • s

120

75% reduction

30% improvement
100

80

80

80

60

40

0

60

40

40

20

20

0
Traditional product Sharp Kaiser

600Traditional product Sharp Kaiser

Traditional product Sharp Kaiser120

Cam lobe grinding

Grinding efﬁciency

Traditional product Sharp Kaiser

100

20

Table 1 Test conditions

100

100

Residual stress(index)Surface roughness(index)carried out under the test conditions in Table 1. Fig. 3

200

0

120

12% ﬁner

The cam lobe grinding test of ductile cast iron material wasMaterial

100

2.9 times
300

Traditional product Sharp Kaiser

120

increased grain protrusion.

[Workpiece]

1.9 times
200

Traditional product Sharp Kaiser

wheel life due to the homogeneous structure and[Grinding wheel]

300

0

0

Fig. 2 Sharp Kaiser

400

Estimated dressing interval
besed on straightness(index)

120

Straightness(index)ability is favorable. But these types of wheels tends to have a short wheel life, which means

Estimated dressing interval basedon surface roughness(index)

to occur more easily. In these types of applications, utilizing a CBN wheel with a high cutting

11% reduction

Fig. 5 Abrasive grain protrusion condition on grinding wheel surface

80
60
High
40
20
0
Low

Traditional product Sharp Kaiser

11

Traditional productSharp Kaiser

12Grinding Solutions For Automotive Engine Manufacturing Processes

uses a high-hardness bond to improve the cutting ofGrinding solution: Cylinder bore grinding (honing) of cylinder blockabrasive grains as well as improve grinding efﬁciency.

Fig. 9MKD Series

Although clogging is caused by the high wear resistance ofcommon high-hardness bonds, the MKD series has a ﬁne
The inner surface of the cylinder block is ﬁnished byhoning, and metal-bonded diamond/CBN honing tools arecommonly used. This grinding method is characterized by

Fig. 6
Schematic diagram of cylinder bore
grinding (honing)bond structure that promotes bond abrasion by groundchips, thus ensuring abrasive grain protrusion and enablingstabilization of cycle time due to good cutting ability (Fig.

inserting the honing head into the bore and grinding by

8). Since the MKD series can maintain the cutting ability of

expanding the tool against the work surface while rotating

the rough process, the surface roughness and bore accuracy are stabilized after the roughand reciprocating within the cylinder bore. Honing is

process, and it is also effective for stabilization of the ﬁnish process (stabilization of cycle time,required the formation of a plateau surface as well as

surface roughness, and bore accuracy).

grinding within the cycle time. Therefore, the surface
roughness and cutting ability corresponding to eachgrinding process are required for honing tools. In addition,

MHB Series (Diamond Tools)

since the tool is used without dressing, honing tools must maintain consistent cutting ability

Feature: Improving cutting ability and longer tool life
through the development of special ﬁllers

throughout its tool-life. NORITAKE’s lineup of bonds for diamond/CBN honing tools can sustainhigh grinding efﬁciency and stable cutting ability even on high hardness workpieces or whensurface roughness ﬁner than Rz4μm is required. Noritake would like to introduce the MKD series
for honing rough process and the MHB series for honing ﬁnish and plateau process.

[Patent pending][Patent applied for]

Fig. 10MHB Series

The MHB Series 3 was compared with the Traditional
product under the test conditions shown in Table 3. The
MHB series has a 30% improvement in stock removal
amount compared to traditional products, and the tool life

MKD Series (Diamond Tools)

is equivalent or better (Fig. 11). In addition, we were able to

Feature: Extending tool life and maintaining cutting ability with high hardness

conﬁrm that the grinding efﬁciency was also stable. The

microstructure bond

MHB series features a special ﬁller instead of the traditional solid lubricant (ﬁller) (Fig. 12). The
special ﬁller wears gradually during grinding to form a chip pocket, enabling suppression of

The test conditions and comparison between a traditional Honing Tool and the MKD Series
Honing Tool are shown in Table 2. The MKD Series Tool achieved 2.2 times longer tool life while
maintaining the same stock removal amount as the traditional product (Fig. 7). The MKD series

grinding force and stable cutting edge renewal cycles. Also, special ﬁllers are chemically bondedwith bonds and abrasive grains, so wear can be reduced compared to traditional ﬁllers. MHB
series realizes cycle time reduction and improvement of cycle time stability while maintaining
tool life.

Fig. 7 Test results

Tool speciﬁcations
SD400 (MKD Series)
Tool dimensions

L60 × W4mm (6 pcs)

Peripheral speed of tool 53m/min
Tool reciprocating speed

22m/min

Workpiece material

Cast iron (FC250(JIS))

100
80
60
40

Traditional product

Table 3 Test conditions

100

SD700 (Traditional product)
Tool speciﬁcations

50
0

MKD Series

Mechanically extended
honing

SD700 (MHB Series)
Traditional product

MKD Series

Tool dimensions

L75 × W4mm (6 pcs)

Peripheral speed of tool 95m/min

Workpiece dimensions ø84×L135mm
Coolant

Water base coolant

Fig. 8 Structure of Traditional Product and MKD Series
Chips

Clogging

Chips

Workpiece

Workpiece

Abrasive grain
Bond

13

Tool reciprocating speed

25m/min

Workpiece material

Cast iron (equivalent toFC250(JIS))

Abrasive grain

Workpiece dimensions ø84×L135mm

Bond

Coolant

140

30% ﬁner

120

120

100
80
60
40
20
0

MKD Series

100
80
60
40
20

Traditional product

MHB Series0

Traditional product

MHB Series

Fig. 12 Structure of Traditional Product and MHB Series
Workpiece

Abrasive grain
Chip pocket

Abrasive grain
Chip pocket

Workpiece

Bond
Solid lubricant(Filler)

Water base coolant

Grain boundary

Grain boundary
Traditional productFig. 11 Test results
140

Grinding method

150

20
0

2.2 times longer

200

Tool life (index)

SD400 (Traditional product)

250

120

Tool life (index)

Mechanically extended honing

Stock removal amount(index)140

Grinding method

Stock removal amount(index)

Table 2 Test conditions

Traditional product

Bond
Special ﬁller

MHB Series

14Grinding Solutions For Automotive Engine Manufacturing Processes

amount of heat generated was reduced. In addition, theGrinding Solution: Crankshaft Pin Grinding

Fig. 17 ∑ Wheel

surface roughness and wheel wear remain the same as thestandard product, but the power consumption has been
reduced by about 10%, and the cutting ability has beenFig. 13
Schematic of
Crankshaft Pin
Grinding

In crankshaft pin grinding, the crankshaft rotates and the
CBN wheel spindle slides back and forth in synch with thecrankshaft pin’s position (Fig. 13). In the process, theimproved (Fig. 15 (c)). The ∑ Wheel is specially coated toreduce grinding heat (Fig. 16). This effect was achieved by
the lubricity improvement that the special coating agent

position of the grinding point and the supply state of theprovides. In the ﬁeld, we were able to achieve a dressing

coolant change continuously as shown in Fig. 14. At points

interval 2 to 4 times that of the current product by

B and D, the coolant supply to the grinding point

suppressing hardness reduction and preventing grinding burn. In addition, we were able todeteriorates. This is known to lead to such issues as

shorten the cycle time because of the reduced power consumption.

grinding burn, cracking, and hardness reduction. At theFig. 14 Pin Grinding Details

same time, there is a demand to extend the dressing

Coolant nozzle

interval as much as possible in order to reduce the tool cost

Orbit at the centerof the crankpin

per machine. Further improved cutting ability and wheel

Crank pinlife are also required. This section introduces the ∑(Sigma)

Grinding point

Wheel as a vitriﬁed CBN wheel suitable for crankshaft pin

B

C

A
D

Crank journal center

grinding.

∑ Wheel (Vitriﬁed-bond CBN wheel)
Feature: Improved lubricity with special coating agent prevents grinding burnThe results of grinding tests using thermography are shown in Table 4. We conﬁrmed that theambient temperature at the grinding point decreased by about 20% (Fig. 15(a), (b)) and theTable 4 Test conditions[Grinding wheel]
Wheel spec

Coolant

Fig. 15 Grinding Characteristicsof ∑ Wheel

Fig. 16 Schematic Diagramof ∑ WheelHigh① CB80-V (Traditional product)

Abrasivegrain② CB80-V (∑ Wheel)
Water base coolant
Dry grinding whenmeasuring temperature

Bond
Low

Fig. 15 Grinding Characteristicsof ∑ Wheel(a)Example of temperature measurement
using thermography
Traditional
product

20% reduction
100
80
60
40
20

∑ WheelWorkpiece120

Temperature (index)

Temperature (index)

120

Specialcoating agent

10% reduction
100
Special coating agent with excellent
lubricity effectively prevents grinding
burn near the grinding point grinding
burn

80
60
40
20

0
Traditional product(b)Thermographic temperature
measurement results∑ Wheel0

Surfaceroughness

Wheel
wear

Power
consumption(c)Other grinding test results

15

16

Grinding wheel, Dresser, Coolant□Domestic Sales Locations■INDUSTRIAL PRODUCTS GROUP SALES DIVISION
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-9833■WESTERN JAPAN BRANCH
2-29 Minamisenrioka, Settsu, Osaka 566-0021 Japan
Tel +81-6-6319-1161■EASTERN JAPAN BRANCH
14-8 Fujimigaoka,Tsuzuki-ku,Yokohama,Kanagawa 224-0051 Japan
Tel +81-45-944-5929■OVERSEAS SALES DEPT.
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-9837■CENTRAL JAPAN BRANCH
3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-7226□Global Manufacturing and Sales Locations■NORITAKE U.S.A., INC.
Cincinnati Branch4990 Alliance Dr., Mason, OH 45040, U.S.A.
Tel +1-513-234-0770■NORITAKE EUROPA GmbH.
Atlanta Branch
490 Sun Valley Dr., Suite#102
Roswell, GA 30076, U.S.A.
Tel +1-770-518-8233

Kurhessenstrasse 3, D-64546
Mörfelden-Walldorf, Germany
Tel +49-61-05-2092-44■NORITAKE SHANGHAI TRADING CO., LTD.
Shanghai Headquarter
Room 701 Aetna Tower No.107, Zun Yi Road,
Chang Ning District, Shanghai, 200051, China
Tel +86-21-6237-5667

Guangzhou Branch2510 Goldlion Digital Network Centar, 138
Tiyu Road East, Guangzhou 510620, China
Tel +86-20-3877-2253

Dalian Branch
22K, International Finance Building,
No.15 Renmin Road Zhongshan
Dist Dalian 116001, China
Tel +86-411-825-06065■NORITAKE SA (THAILAND) CO., LTD.
Bangkok Office
388 Amigo Tower, 17th Floor, Zone A/1, Siphraya Rord,
Mahapruetaram, Bangrak, Bangkok, 10500, Thailand
Tel +66-2-235-1688

Filtration■ NORITAKE CO., LIMITED Fluid Technology Dept.

Filtration System Section

3-1-36 Noritake-Shinmachi, Nishi-Ku, Nagoya 451-8501 Japan
Tel +81-52-561-4268

WebsiteContact us

Distributed by

The contents are subject to change without notice.

23070500SK