(!)Due to Microsoft's end of support for Internet Explorer 11 on 15/06/2022, this site does not support the recommended environment.

9.5 Million Products, 1,600 Brands, Free Shipping,
63,000 Stock items for Same Day Shipping

9.5 Juta Produk, 1,600 Merek, Gratis Pengiriman,
63,000 Item Stok untuk Pengiriman di Hari yang Sama

021-8984-0008

8:30 - 17:30 (Mon-Fri), 8:30 - 15:00 (Sat)

8:30 - 17:30 (Sen-Jum), 8:30 - 15:00 (Sab)

Search by Category / Brand Pencarian dengan
Kategori / Merek

Search by Category Pencarian dengan Kategori

Automation Components
A wide variety of standard and configurable components for factory automation engineers in industries such as automotive, semiconductor, packaging, medical and many more.
Fasteners
A good selection of accessories such as screws, bolts, washers and nuts that you may need for your daily engineering usage.
Materials
Browse industrial materials ranging from heat insulating plates, sponges, to metal and plastic materials in different sizes to meet your various applications.
Wiring Components
A wide variety of wiring parts for connecting and protecting control and PC parts including Connectors, Cables, Electric Wires, Crimping Terminals and more.
Electrical & Controls
A wide variety of controls and PC parts for electrical engineers including Controls, Powers, PC parts and more.
Cutting Tools
A wide variety of cutting tools for many uses and work materials including End Mills, Drills, Cutters, Reamers, Turning Tools and more.
Processing Tools
A wide variety of tools and supplies used in processing including Machine Tools, Measurement Tools, Grinding and Polishing Supplies and more.
Material Handling & Storage
A wide variety of goods used in shipment, material handling and warehouse including Tape supplies, Stretch film, Truck, Shelf, Crane and more.
Safety & General Supplies
A large variety of goods for every kind of factories and offices including Protection items, Cleaning supplies, sanitations, office supplies and more.
Lab & Clean Room Supplies
A large variety of items used in R&D and Clean Room including research Equipment, Laboratory Essentials, Analysis Supplies, Clean Environment-Related Equipment and more.
Press Die Components
Choose from thousands of standard stamping die components including Punch & Die, Gas Springs, Guide Components, Coil Springs and many more.
Plastic Mold Components
Browse our wide variety of mold components including Ejector Pins, Sleeves, Leader Components, Sprue Bushings and many more.
Injection Molding Components
Browse our injection molding components including Heating Items, Couplers, Hoses and more.

Search by Brand Pencarian dengan Merek

Brand List Daftar Merek

Webcode Seach | Series: #CODE

Keyword suggestions

Part number suggestions

Discontinued Products

This translation is a Google translation Terjemahan ini adalah terjemahan Google

Penghentian penjualan kategori produk pneumatik Seri Ekonomi (E-series). Info Detail
Notice of End of Sales for Economy Series Pneumatic Equipment Category. More information.

How can we improve?Bagaimana Kami bisa meningkatkan Pelayanan?

How can we improve?Bagaimana Kami bisa meningkatkan Pelayanan?

CommentsSaran

Name (Optional)Nama (tidak wajib)

E-mail Address (Optional)E-mail (tidak wajib)

Tel (Optional)

While we are not able to respond directly to comments submitted in this form, the information will be reviewed for future improvement.
Customer Privacy Policy Walaupun Kami tidak dapat langsung menjawab saran yang ditulis di lembar ini, informasinya akan kami review untuk peningkatan pelayanan dikemudian hari
Kebijakan Privacy

Thank you for your cooperation.Terima kasih atas kerjasama anda.

While we are not able to respond directly to comments submitted in this form, the information will be reviewed for future improvement.
Please use the inquiry form.
Customer Privacy Policy Walaupun Kami tidak dapat langsung menjawab saran yang ditulis di lembar ini, informasinya akan kami review untuk peningkatan pelayanan dikemudian hari
Silahkan pergunakan Forms Permintaan.
Kebijakan Privacy

Epoch Deep Ball Evolution (PN Coating) EPDBE2-PN

MITSUBISHI HITACHI TOOL

The inclination is suppressed and the high-precision machining is achieved by improving the shape of the blade tip and neck. Even longer lifespan processing is obtained by adopting ATH & PN coating.

Part Number

Configured Part Number is shown.

Product TOP

: 30; 45; 60

Part Number
EPDBE2006-1-PN
EPDBE2006-2-PN
EPDBE2006-2.5-PN
EPDBE2006-3-PN
EPDBE2006-3.5-PN
EPDBE2006-4-PN
EPDBE2006-4.5-PN
EPDBE2006-5-PN
EPDBE2006-5.5-PN
EPDBE2006-6-PN
EPDBE2006-7-PN
EPDBE2006-8-PN
EPDBE2006-9-PN
EPDBE2006-10-PN
EPDBE2006-12-PN
EPDBE2007-2-PN
EPDBE2007-4-PN
EPDBE2007-6-PN
EPDBE2007-8-PN
EPDBE2008-2-PN
EPDBE2008-4-PN
EPDBE2008-5-PN
EPDBE2008-6-PN
EPDBE2008-8-PN
EPDBE2008-10-PN
EPDBE2009-2-PN
EPDBE2009-4-PN
EPDBE2009-6-PN
EPDBE2009-8-PN
EPDBE2010-2-PN
EPDBE2010-3-PN
EPDBE2010-4-PN
EPDBE2010-5-PN
EPDBE2010-6-PN
EPDBE2010-7-PN
EPDBE2010-8-PN
EPDBE2010-9-PN
EPDBE2010-10-PN
EPDBE2010-12-PN
EPDBE2010-13-PN
EPDBE2010-14-PN
EPDBE2010-16-PN
EPDBE2010-18-PN
EPDBE2010-20-PN
EPDBE2011-2-PN
EPDBE2011-4-PN
EPDBE2011-6-PN
EPDBE2011-8-PN
EPDBE2011-10-PN
EPDBE2012-4-PN
EPDBE2012-8-PN
EPDBE2012-10-PN
EPDBE2012-12-PN
EPDBE2014-8-PN
EPDBE2014-12-PN
EPDBE2014-16-PN
EPDBE2015-4-PN
EPDBE2015-6-PN
EPDBE2015-8-PN
EPDBE2015-10-PN

Standard Unit Price	Minimum order quantity	Days to Ship	R Size (mm)	Blade length (ℓ) (mm)	Overall Length (L) (mm)	Length Under Neck (ℓ2) (mm)	Link Diameter (Ds) (mm)	R Precision (μm)	Outer Diameter Dc (mm)	Neck Diameter D1 (mm)	Neck R (mm)	Interference Angle θκ (°)	Actual Effective Under Neck Length for Inclined Angle 0.5° (mm)	Actual Effective Under Neck Length for Inclined Angle 1° (mm)	Actual Effective Under Neck Length for Inclined Angle 1.5° (mm)	Actual Effective Under Neck Length for Inclined Angle 2° (mm)	Actual Effective Under Neck Length for Inclined Angle 3° (mm)
969,693 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	1	4	-0.005～0.005	0.6	0.57	4	10.98	1.44	1.54	1.63	1.71	1.88
920,000 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	2	4	-0.005～0.005	0.6	0.57	4	9.88	2.52	2.66	2.79	2.91	3.13
941,538 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	2.5	4	-0.005～0.005	0.6	0.57	4	9.41	3.05	3.22	3.36	3.49	3.73
941,538 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	3	4	-0.005～0.005	0.6	0.57	4	8.98	3.58	3.77	3.93	4.07	4.32
984,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	3.5	4	-0.005～0.005	0.6	0.57	4	8.58	4.12	4.32	4.49	4.64	4.91
984,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	4	4	-0.005～0.005	0.6	0.57	4	8.22	4.64	4.86	5.04	5.2	5.48
984,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	4.5	4	-0.005～0.005	0.6	0.57	4	7.89	5.17	5.4	5.59	5.76	6.06
984,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	5	4	-0.005～0.005	0.6	0.57	4	7.59	5.7	5.94	6.14	6.32	6.63
984,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	5.5	4	-0.005～0.005	0.6	0.57	4	7.31	6.22	6.48	6.69	6.87	7.29
984,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	6	4	-0.005～0.005	0.6	0.57	4	7.04	6.75	7.02	7.23	7.42	7.96
1,110,769 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	7	4	-0.005～0.005	0.6	0.57	4	6.57	7.79	8.08	8.32	8.52	9.28
1,306,154 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	8	4	-0.005～0.005	0.6	0.57	4	6.16	8.84	9.15	9.4	9.61	10.61
1,392,308 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	9	4	-0.005～0.005	0.6	0.57	4	5.79	9.88	10.21	10.47	10.79	11.94
1,324,615 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	10	4	-0.005～0.005	0.6	0.57	4	5.47	10.92	11.26	11.54	11.99	13.27
1,496,923 IDR	1 Piece(s)	12 Day(s)	0.3	0.4	50	12	4	-0.005～0.005	0.6	0.57	4	4.92	12.99	13.37	13.72	14.38	15.92
920,000 IDR	1 Piece(s)	12 Day(s)	0.35	0.45	50	2	4	-0.005～0.005	0.7	0.67	4	9.88	2.52	2.66	2.79	2.9	3.12
984,615 IDR	1 Piece(s)	12 Day(s)	0.35	0.45	50	4	4	-0.005～0.005	0.7	0.67	4	8.18	4.64	4.86	5.04	5.2	5.48
984,615 IDR	1 Piece(s)	12 Day(s)	0.35	0.45	50	6	4	-0.005～0.005	0.7	0.67	4	6.98	6.74	7.01	7.23	7.42	7.94
984,615 IDR	1 Piece(s)	12 Day(s)	0.35	0.45	50	8	4	-0.005～0.005	0.7	0.67	4	6.09	8.83	9.14	9.39	9.61	10.6
920,000 IDR	1 Piece(s)	12 Day(s)	0.4	0.5	50	2	4	-0.005～0.005	0.8	0.77	4	9.87	2.51	2.65	2.78	2.89	3.11
984,615 IDR	1 Piece(s)	12 Day(s)	0.4	0.5	50	4	4	-0.005～0.005	0.8	0.77	4	8.14	4.64	4.85	5.03	5.19	5.47
984,615 IDR	1 Piece(s)	12 Day(s)	0.4	0.5	50	5	4	-0.005～0.005	0.8	0.77	4	7.48	5.69	5.93	6.13	6.31	6.61
984,615 IDR	1 Piece(s)	12 Day(s)	0.4	0.5	50	6	4	-0.005～0.005	0.8	0.77	4	6.92	6.74	7.01	7.23	7.41	7.92
984,615 IDR	1 Piece(s)	12 Day(s)	0.4	0.5	50	8	4	-0.005～0.005	0.8	0.77	4	6.01	8.83	9.14	9.39	9.6	10.58
1,306,154 IDR	1 Piece(s)	12 Day(s)	0.4	0.5	50	10	4	-0.005～0.005	0.8	0.77	4	5.32	10.91	11.26	11.53	11.97	13.23
920,000 IDR	1 Piece(s)	12 Day(s)	0.45	0.6	50	2	4	-0.005～0.005	0.9	0.87	4	9.87	2.51	2.65	2.77	2.89	3.10
984,615 IDR	1 Piece(s)	12 Day(s)	0.45	0.6	50	4	4	-0.005～0.005	0.9	0.87	4	8.09	4.64	4.85	5.03	5.18	5.46
984,615 IDR	1 Piece(s)	12 Day(s)	0.45	0.6	50	6	4	-0.005～0.005	0.9	0.87	4	6.85	6.74	7.00	7.22	7.41	7.91
984,615 IDR	1 Piece(s)	12 Day(s)	0.45	0.6	50	8	4	-0.005～0.005	0.9	0.87	4	5.94	8.83	9.14	9.38	9.6	10.56
722,000 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	2	4	-0.005～0.005	1	0.96	4	9.84	2.54	2.67	2.79	2.9	3.11
722,000 IDR	1 Piece(s)	Quote	0.5	0.8	50	3	4	-0.005～0.005	1	0.96	4	8.84	3.61	3.78	3.93	4.06	4.3
878,462 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	4	4	-0.005～0.005	1	0.96	4	8.02	4.66	4.87	5.04	5.2	5.47
878,462 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	5	4	-0.005～0.005	1	0.96	4	7.34	5.72	5.95	6.14	6.31	6.61
941,538 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	6	4	-0.005～0.005	1	0.96	4	6.77	6.76	7.02	7.23	7.42	7.92
941,538 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	7	4	-0.005～0.005	1	0.96	4	6.28	7.81	8.09	8.32	8.52	9.25
882,924 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	8	4	-0.005～0.005	1	0.96	4	5.85	8.85	9.15	9.4	9.61	10.58
941,538 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	9	4	-0.005～0.005	1	0.96	4	5.48	9.89	10.21	10.47	10.78	11.91
941,538 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	50	10	4	-0.005～0.005	1	0.96	4	5.15	10.93	11.27	11.54	11.98	13.23
941,538 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	55	12	4	-0.005～0.005	1	0.96	4	4.6	13	13.37	13.72	14.37	15.89
1,110,769 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	55	13	4	-0.005～0.005	1	0.96	4	4.37	14.04	14.42	14.86	15.57	17.21
1,110,769 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	55	14	4	-0.005～0.005	1	0.96	4	4.16	15.07	15.47	16.00	16.76	18.54
1,306,154 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	55	16	4	-0.005～0.005	1	0.96	4	3.79	17.13	17.56	18.28	19.16	21.20
1,306,154 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	60	18	4	-0.005～0.005	1	0.96	4	3.49	19.19	19.66	20.56	21.55	23.85
1,484,616 IDR	1 Piece(s)	12 Day(s)	0.5	0.8	60	20	4	-0.005～0.005	1	0.96	4	3.23	21.25	21.84	22.84	23.94	26.51
1,033,846 IDR	1 Piece(s)	12 Day(s)	0.55	1	50	2	4	-0.005～0.005	1.1	1.05	4	9.81	2.58	2.7	2.81	2.92	3.12
1,178,462 IDR	1 Piece(s)	12 Day(s)	0.55	1	50	4	4	-0.005～0.005	1.1	1.05	4	7.95	4.69	4.89	5.06	5.21	5.48
1,284,615 IDR	1 Piece(s)	12 Day(s)	0.55	1	50	6	4	-0.005～0.005	1.1	1.05	4	6.68	6.79	7.04	7.25	7.43	7.94
1,284,615 IDR	1 Piece(s)	12 Day(s)	0.55	1	50	8	4	-0.005～0.005	1.1	1.05	4	5.76	8.87	9.17	9.41	9.61	10.59
1,284,615 IDR	1 Piece(s)	12 Day(s)	0.55	1	50	10	4	-0.005～0.005	1.1	1.05	4	5.06	10.95	11.28	11.55	12.00	13.25
1,178,462 IDR	1 Piece(s)	12 Day(s)	0.6	1.1	50	4	4	-0.005～0.005	1.2	1.15	4	7.89	4.69	4.88	5.05	5.2	5.47
1,284,615 IDR	1 Piece(s)	12 Day(s)	0.6	1.1	50	8	4	-0.005～0.005	1.2	1.15	4	5.67	8.87	9.16	9.4	9.61	10.58
1,284,615 IDR	1 Piece(s)	12 Day(s)	0.6	1.1	50	10	4	-0.005～0.005	1.2	1.15	4	4.97	10.95	11.28	11.54	11.99	13.23
1,284,615 IDR	1 Piece(s)	12 Day(s)	0.6	1.1	55	12	4	-0.005～0.005	1.2	1.15	4	4.43	13.02	13.38	13.73	14.38	15.89
1,110,769 IDR	1 Piece(s)	12 Day(s)	0.7	1.3	50	8	4	-0.005～0.005	1.4	1.34	4	5.48	8.89	9.18	9.41	9.61	10.58
1,110,769 IDR	1 Piece(s)	12 Day(s)	0.7	1.3	55	12	4	-0.005～0.005	1.4	1.34	4	4.24	13.04	13.39	13.74	14.39	15.89
1,110,769 IDR	1 Piece(s)	12 Day(s)	0.7	1.3	55	16	4	-0.005～0.005	1.4	1.34	4	3.46	17.16	17.57	18.31	19.17	21.20
898,462 IDR	1 Piece(s)	12 Day(s)	0.75	1.35	50	4	4	-0.005～0.005	1.5	1.44	4	7.68	4.71	4.89	5.06	5.2	5.46
898,462 IDR	1 Piece(s)	12 Day(s)	0.75	1.35	50	6	4	-0.005～0.005	1.5	1.44	4	6.33	6.81	7.04	7.25	7.42	7.91
941,538 IDR	1 Piece(s)	12 Day(s)	0.75	1.35	50	8	4	-0.005～0.005	1.5	1.44	4	5.39	8.89	9.17	9.41	9.61	10.56
1,027,692 IDR	1 Piece(s)	12 Day(s)	0.75	1.35	50	10	4	-0.005～0.005	1.5	1.44	4	4.68	10.96	11.29	11.55	11.98	13.22

Basic Information

Type	Bore	work material	General Steel / Heat-Treated Steel / High-Hardness Steel ~ HRC55 / High-Hardness Steel ~ HRC60 / High-Hardness Steel ~ HRC65 / Stainless Steel / Aluminum / Titanium / Copper	Number of flutes(sheet)	2
Coating	PN / CS Coating	Machining Application	Curved Surface / Carving / R-Groove	Torsion Availability	Available
Details of Coating	PN Coat

Configure

125 Part Numbers

View Part Numbers

Configure Remaining Specifications

Completed

Specification/Dimensions

R Size(mm)
0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

0.55

0.6

0.7

0.75

0.8

0.9

1

1.25

1.5

1.75

2

2.5

3
Clear
Blade length (ℓ)(mm)
0.08

0.15

0.25

0.3

0.35

0.4

0.45

0.5

0.6

0.8

1

1.1

1.3

1.35

1.4

1.6

1.7

2

2.5

2.75

3

3.5

6
Clear
Overall Length (L)(mm)
45

50

55

60

65

70

75

80

90

100
Clear
Length Under Neck (ℓ2)(mm)
0.2

0.3

0.5

0.75

1

1.25

1.5

2

2.5

3

3.5

4

4.5

5

5.5

6

7

8

9

10

12

13

14

15

16

18

20

22

25

30

35

40

45

50
Clear
Link Diameter (Ds)(mm)
4

6
Clear
type
- EPDBE2□□□-□□.□□-PN
Clear
R Precision(μm)
-0.005～0.005

-0.003～0.003
Clear

Days to Ship

All

12 Day(s) or Less
Clear

Specify Alterations

The specifications and dimensions of some parts may not be fully covered. For exact details, refer to manufacturer catalogs .

Tech Support

Factory Automation, Electronics, Tools, & MRO (Maintenance, Repair and Operations): Tel：021-8990-4102 / FAX：021-8990-5803; 8:30am - 5:30pm (Monday - Friday); Technical Inquiry

Top of the page

Payment MethodMetode Pembayaran more Pelajari lebih lanjut

Bank TransferTransfer Bank

About MISUMITentang MISUMI

About this WebsiteTentang Website ini

Useful ToolsAlat Serbaguna

Customer ServiceLayanan Pelanggan

MISUMI Contact Monday to Friday (8:30am to 5:30pm) , Saturday (8:30am to 3:00pm) Order cut off time Monday to Friday: 4:30pm , Saturday : 2:00pm MISUMI Kontak Senin - Jumat (8:30 WIB - 17:30 WIB) , Sabtu (8:30WIB - 15:00 WIB) Batas Waktu Pemesanan Senin - Jumat : 16:30 WIB , Sabtu : 14:00 WIB

Tel:021-8984-0008
Fax:021-8984-0007

Inquiry Permintaan

Search by Category / Brand Pencarian dengan
Kategori / Merek

Search by Category Pencarian dengan Kategori

Search by Brand Pencarian dengan Merek

Message from MISUMI Message from MISUMI

My Favorites My Favorites

Settings Settings

How can we improve?Bagaimana Kami bisa meningkatkan Pelayanan?

Epoch Deep Ball Evolution (PN Coating) EPDBE2-PN

Basic Information

Configure

Specification/Dimensions

R Size(mm)

Blade length (ℓ)(mm)

Overall Length (L)(mm)

Length Under Neck (ℓ2)(mm)

Link Diameter (Ds)(mm)

type

R Precision(μm)

Days to Ship

Specify Alterations

Tech Support

Payment MethodMetode Pembayaran more Pelajari lebih lanjut

About MISUMITentang MISUMI

About this WebsiteTentang Website ini

Useful ToolsAlat Serbaguna

Customer ServiceLayanan Pelanggan

MISUMI Contact Monday to Friday (8:30am to 5:30pm) , Saturday (8:30am to 3:00pm) Order cut off time Monday to Friday: 4:30pm , Saturday : 2:00pm MISUMI Kontak Senin - Jumat (8:30 WIB - 17:30 WIB) , Sabtu (8:30WIB - 15:00 WIB) Batas Waktu Pemesanan Senin - Jumat : 16:30 WIB , Sabtu : 14:00 WIB

Search by Category / Brand Pencarian dengan Kategori / Merek

Search by Category Pencarian dengan Kategori

Search by Brand Pencarian dengan Merek

Message from MISUMI Message from MISUMI

My Favorites My Favorites

Settings Settings

How can we improve?Bagaimana Kami bisa meningkatkan Pelayanan?

Epoch Deep Ball Evolution (PN Coating) EPDBE2-PN

Basic Information

Configure

Specification/Dimensions

R Size(mm)

Blade length (ℓ)(mm)

Overall Length (L)(mm)

Length Under Neck (ℓ2)(mm)

Link Diameter (Ds)(mm)

type

R Precision(μm)

Days to Ship

Specify Alterations

Tech Support

Payment MethodMetode Pembayaran more Pelajari lebih lanjut

About MISUMITentang MISUMI

About this WebsiteTentang Website ini

Useful ToolsAlat Serbaguna

Customer ServiceLayanan Pelanggan

MISUMI Contact Monday to Friday (8:30am to 5:30pm) , Saturday (8:30am to 3:00pm) *Order cut off time Monday to Friday: 4:30pm , Saturday : 2:00pm MISUMI Kontak Senin - Jumat (8:30 WIB - 17:30 WIB) , Sabtu (8:30WIB - 15:00 WIB) *Batas Waktu Pemesanan Senin - Jumat : 16:30 WIB , Sabtu : 14:00 WIB

Search by Category / Brand Pencarian dengan
Kategori / Merek

MISUMI Contact Monday to Friday (8:30am to 5:30pm) , Saturday (8:30am to 3:00pm) Order cut off time Monday to Friday: 4:30pm , Saturday : 2:00pm MISUMI Kontak Senin - Jumat (8:30 WIB - 17:30 WIB) , Sabtu (8:30WIB - 15:00 WIB) Batas Waktu Pemesanan Senin - Jumat : 16:30 WIB , Sabtu : 14:00 WIB