• NMB DDRI/DDR Inch Series Radial Miniature Bearings (Open, Z, ZZ)
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NMB DDRI/DDR Inch Series Radial Miniature Bearings (Open, Z, ZZ)

NMB DDRI/DDR Inch Series Radial Miniature Bearings (Open, Z, ZZ)

NMB DDRI and DDR inch series radial ball bearings in 400 series martensitic stainless steel, supplied open or with one or two metal shields.

Key features

  • Bore range .0400 to .7500 in
  • Open, single-shield (Z) and double-shield (ZZ) versions
  • 400 series martensitic stainless steel rings and balls
  • ABEC 1, 3, 5 and 7 tolerances apply
  • Dynamic and static radial load ratings listed in newtons

Specifications

Brand NMB
Ring material 400 series martensitic stainless steel (DD prefix)
Tolerance classes ABEC 1, 3, 5, 7
Series Inch radial (DDRI, DDR)
Units d, D, B in inches; Cr, Cor in N
Source NMB Miniature & Small Precision Ball Bearings catalog, p. 2.2-2.3
DDRI-2 d: .0400 in | D: .1250 in | B: .0469 in | Cr: 106 N | Cor: 28 N
DDRI-2 1/2 d: .0469 in | D: .1562 in | B: .0625 in | Cr: 158 N | Cor: 44 N
DDRI-3 d: .0550 in | D: .1875 in | B: .0781 in | Cr: 264 N | Cor: 71 N
DDRI-4 d: .0781 in | D: .2500 in | B: .0937 in | Cr: 330 N | Cor: 99 N
DDRI-3332 d: .0937 in | D: .1875 in | B: .0625 in | Cr: 187 N | Cor: 59 N
DDRI-5 d: .0937 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-418 d: .1250 in | D: .2500 in | B: .0937 in | Cr: 285 N | Cor: 97 N
DDRI-518 d: .1250 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-618 d: .1250 in | D: .3750 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDR-2 d: .1250 in | D: .3750 in | B: .1562 in | Cr: 641 N | Cor: 226 N
DDRI-5532 d: .1562 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-5632 d: .1875 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-6632 d: .1875 in | D: .3750 in | B: .1250 in | Cr: 712 N | Cor: 271 N
DDR-3 d: .1875 in | D: .5000 in | B: .1562 in | Cr: 1306 N | Cor: 487 N
DDRI-614 d: .2500 in | D: .3750 in | B: .1250 in | Cr: 417 N | Cor: 205 N
DDRI-814 d: .2500 in | D: .5000 in | B: .1250 in | Cr: 828 N | Cor: 374 N
DDR-4 d: .2500 in | D: .6250 in | B: .1960 in | Cr: 1470 N | Cor: 599 N
DDRI-1214 d: .2500 in | D: .7500 in | B: .2188 in | Cr: 2411 N | Cor: 912 N
DDRI-8516 d: .3125 in | D: .5000 in | B: .1562 in | Cr: 878 N | Cor: 419 N
DDRI-1038 d: .3750 in | D: .6250 in | B: .1562 in | Cr: 906 N | Cor: 477 N
DDRI-1438 d: .3750 in | D: .8750 in | B: .2188 in | Cr: 3297 N | Cor: 1368 N
DDRI-1212 d: .5000 in | D: .7500 in | B: .1562 in | Cr: 1051 N | Cor: 662 N
DDRI-1812 d: .5000 in | D: 1.1250 in | B: .2500 in | Cr: 5113 N | Cor: 2387 N
DDRI-1458 d: .6250 in | D: .8750 in | B: .1562 in | Cr: 1092 N | Cor: 742 N
DDRI-1634 d: .7500 in | D: 1.0000 in | B: .1562 in | Cr: 1204 N | Cor: 895 N
DDRI-2 1/2Z d: .0469 in | D: .1562 in | B: .0937 in | Cr: 158 N | Cor: 44 N
DDRI-2 1/2ZZ d: .0469 in | D: .1562 in | B: .0937 in | Cr: 158 N | Cor: 44 N
DDRI-3Z d: .0550 in | D: .1875 in | B: .0937 in | Cr: 264 N | Cor: 71 N
DDRI-3ZZ d: .0550 in | D: .1875 in | B: .1094 in | Cr: 264 N | Cor: 71 N
DDRI-4Z d: .0781 in | D: .2500 in | B: .1094 in | Cr: 330 N | Cor: 99 N
DDRI-4ZZ d: .0781 in | D: .2500 in | B: .1406 in | Cr: 330 N | Cor: 99 N
DDRI-3332Z d: .0937 in | D: .1875 in | B: .0937 in | Cr: 187 N | Cor: 59 N
DDRI-3332ZZ d: .0937 in | D: .1875 in | B: .0937 in | Cr: 187 N | Cor: 59 N
DDRI-5Z d: .0937 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-5ZZ d: .0937 in | D: .3125 in | B: .1406 in | Cr: 563 N | Cor: 183 N
DDRI-418Z d: .1250 in | D: .2500 in | B: .0937 in | Cr: 285 N | Cor: 97 N
DDRI-418ZZ d: .1250 in | D: .2500 in | B: .1094 in | Cr: 285 N | Cor: 97 N
DDRI-518Z d: .1250 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-518ZZ d: .1250 in | D: .3125 in | B: .1406 in | Cr: 563 N | Cor: 183 N
DDRI-618Z d: .1250 in | D: .3750 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-618ZZ d: .1250 in | D: .3750 in | B: .1406 in | Cr: 563 N | Cor: 183 N
DDR-2Z d: .1250 in | D: .3750 in | B: .1562 in | Cr: 641 N | Cor: 226 N
DDR-2ZZ d: .1250 in | D: .3750 in | B: .1562 in | Cr: 641 N | Cor: 226 N
DDRI-5532Z d: .1562 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-5532ZZ d: .1562 in | D: .3125 in | B: .1250 in | Cr: 391 N | Cor: 142 N
DDRI-5632Z d: .1875 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-5632ZZ d: .1875 in | D: .3125 in | B: .1250 in | Cr: 391 N | Cor: 142 N
DDRI-6632Z d: .1875 in | D: .3750 in | B: .1250 in | Cr: 712 N | Cor: 271 N
DDRI-6632ZZ d: .1875 in | D: .3750 in | B: .1250 in | Cr: 712 N | Cor: 271 N
DDR-3Z d: .1875 in | D: .5000 in | B: .1960 in | Cr: 1306 N | Cor: 487 N
DDR-3ZZ d: .1875 in | D: .5000 in | B: .1960 in | Cr: 1306 N | Cor: 487 N
DDRI-614Z d: .2500 in | D: .3750 in | B: .1250 in | Cr: 417 N | Cor: 205 N
DDRI-614ZZ d: .2500 in | D: .3750 in | B: .1250 in | Cr: 417 N | Cor: 205 N
DDRI-814Z d: .2500 in | D: .5000 in | B: .1250 in | Cr: 828 N | Cor: 374 N
DDRI-814ZZ d: .2500 in | D: .5000 in | B: .1875 in | Cr: 828 N | Cor: 374 N
DDR-4Z d: .2500 in | D: .6250 in | B: .1960 in | Cr: 1470 N | Cor: 599 N
DDR-4ZZ d: .2500 in | D: .6250 in | B: .1960 in | Cr: 1470 N | Cor: 599 N
DDRI-1214Z d: .2500 in | D: .7500 in | B: .2812 in | Cr: 2411 N | Cor: 912 N
DDRI-1214ZZ d: .2500 in | D: .7500 in | B: .2812 in | Cr: 2411 N | Cor: 912 N
DDRI-8516Z d: .3125 in | D: .5000 in | B: .1562 in | Cr: 878 N | Cor: 419 N
DDRI-8516ZZ d: .3125 in | D: .5000 in | B: .1562 in | Cr: 878 N | Cor: 419 N
DDRI-1038Z d: .3750 in | D: .6250 in | B: .1562 in | Cr: 906 N | Cor: 477 N
DDRI-1038ZZ d: .3750 in | D: .6250 in | B: .1562 in | Cr: 906 N | Cor: 477 N
DDRI-1438Z d: .3750 in | D: .8750 in | B: .2812 in | Cr: 3297 N | Cor: 1368 N
DDRI-1438ZZ d: .3750 in | D: .8750 in | B: .2812 in | Cr: 3297 N | Cor: 1368 N
DDRI-1212Z d: .5000 in | D: .7500 in | B: .1562 in | Cr: 1051 N | Cor: 662 N
DDRI-1212ZZ d: .5000 in | D: .7500 in | B: .1562 in | Cr: 1051 N | Cor: 662 N
DDRI-1812Z d: .5000 in | D: 1.1250 in | B: .3125 in | Cr: 5113 N | Cor: 2387 N
DDRI-1812ZZ d: .5000 in | D: 1.1250 in | B: .3125 in | Cr: 5113 N | Cor: 2387 N
DDRI-1458Z d: .6250 in | D: .8750 in | B: .1562 in | Cr: 1092 N | Cor: 742 N
DDRI-1458ZZ d: .6250 in | D: .8750 in | B: .1562 in | Cr: 1092 N | Cor: 742 N
DDRI-1634Z d: .7500 in | D: 1.0000 in | B: .1562 in | Cr: 1204 N | Cor: 895 N
DDRI-1634ZZ d: .7500 in | D: 1.0000 in | B: .1562 in | Cr: 1204 N | Cor: 895 N
Miniature BearingsNMB
73 product codes available in this family
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NMB DDRI/DDR Inch Series Radial Miniature Bearings (Open, Z, ZZ)

Brand NMB·Miniature Bearings

Available part numbers (73)

DDRI-2, DDRI-2 1/2, DDRI-3, DDRI-4, DDRI-3332, DDRI-5, DDRI-418, DDRI-518, DDRI-618, DDR-2 + 63 more — see full table ↓

How to order

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Product codeSpec
DDRI-2d: .0400 in | D: .1250 in | B: .0469 in | Cr: 106 N | Cor: 28 N
DDRI-2 1/2d: .0469 in | D: .1562 in | B: .0625 in | Cr: 158 N | Cor: 44 N
DDRI-3d: .0550 in | D: .1875 in | B: .0781 in | Cr: 264 N | Cor: 71 N
DDRI-4d: .0781 in | D: .2500 in | B: .0937 in | Cr: 330 N | Cor: 99 N
DDRI-3332d: .0937 in | D: .1875 in | B: .0625 in | Cr: 187 N | Cor: 59 N
DDRI-5d: .0937 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-418d: .1250 in | D: .2500 in | B: .0937 in | Cr: 285 N | Cor: 97 N
DDRI-518d: .1250 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-618d: .1250 in | D: .3750 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDR-2d: .1250 in | D: .3750 in | B: .1562 in | Cr: 641 N | Cor: 226 N
DDRI-5532d: .1562 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-5632d: .1875 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-6632d: .1875 in | D: .3750 in | B: .1250 in | Cr: 712 N | Cor: 271 N
DDR-3d: .1875 in | D: .5000 in | B: .1562 in | Cr: 1306 N | Cor: 487 N
DDRI-614d: .2500 in | D: .3750 in | B: .1250 in | Cr: 417 N | Cor: 205 N
DDRI-814d: .2500 in | D: .5000 in | B: .1250 in | Cr: 828 N | Cor: 374 N
DDR-4d: .2500 in | D: .6250 in | B: .1960 in | Cr: 1470 N | Cor: 599 N
DDRI-1214d: .2500 in | D: .7500 in | B: .2188 in | Cr: 2411 N | Cor: 912 N
DDRI-8516d: .3125 in | D: .5000 in | B: .1562 in | Cr: 878 N | Cor: 419 N
DDRI-1038d: .3750 in | D: .6250 in | B: .1562 in | Cr: 906 N | Cor: 477 N
DDRI-1438d: .3750 in | D: .8750 in | B: .2188 in | Cr: 3297 N | Cor: 1368 N
DDRI-1212d: .5000 in | D: .7500 in | B: .1562 in | Cr: 1051 N | Cor: 662 N
DDRI-1812d: .5000 in | D: 1.1250 in | B: .2500 in | Cr: 5113 N | Cor: 2387 N
DDRI-1458d: .6250 in | D: .8750 in | B: .1562 in | Cr: 1092 N | Cor: 742 N
DDRI-1634d: .7500 in | D: 1.0000 in | B: .1562 in | Cr: 1204 N | Cor: 895 N
DDRI-2 1/2Zd: .0469 in | D: .1562 in | B: .0937 in | Cr: 158 N | Cor: 44 N
DDRI-2 1/2ZZd: .0469 in | D: .1562 in | B: .0937 in | Cr: 158 N | Cor: 44 N
DDRI-3Zd: .0550 in | D: .1875 in | B: .0937 in | Cr: 264 N | Cor: 71 N
DDRI-3ZZd: .0550 in | D: .1875 in | B: .1094 in | Cr: 264 N | Cor: 71 N
DDRI-4Zd: .0781 in | D: .2500 in | B: .1094 in | Cr: 330 N | Cor: 99 N
DDRI-4ZZd: .0781 in | D: .2500 in | B: .1406 in | Cr: 330 N | Cor: 99 N
DDRI-3332Zd: .0937 in | D: .1875 in | B: .0937 in | Cr: 187 N | Cor: 59 N
DDRI-3332ZZd: .0937 in | D: .1875 in | B: .0937 in | Cr: 187 N | Cor: 59 N
DDRI-5Zd: .0937 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-5ZZd: .0937 in | D: .3125 in | B: .1406 in | Cr: 563 N | Cor: 183 N
DDRI-418Zd: .1250 in | D: .2500 in | B: .0937 in | Cr: 285 N | Cor: 97 N
DDRI-418ZZd: .1250 in | D: .2500 in | B: .1094 in | Cr: 285 N | Cor: 97 N
DDRI-518Zd: .1250 in | D: .3125 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-518ZZd: .1250 in | D: .3125 in | B: .1406 in | Cr: 563 N | Cor: 183 N
DDRI-618Zd: .1250 in | D: .3750 in | B: .1094 in | Cr: 563 N | Cor: 183 N
DDRI-618ZZd: .1250 in | D: .3750 in | B: .1406 in | Cr: 563 N | Cor: 183 N
DDR-2Zd: .1250 in | D: .3750 in | B: .1562 in | Cr: 641 N | Cor: 226 N
DDR-2ZZd: .1250 in | D: .3750 in | B: .1562 in | Cr: 641 N | Cor: 226 N
DDRI-5532Zd: .1562 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-5532ZZd: .1562 in | D: .3125 in | B: .1250 in | Cr: 391 N | Cor: 142 N
DDRI-5632Zd: .1875 in | D: .3125 in | B: .1094 in | Cr: 391 N | Cor: 142 N
DDRI-5632ZZd: .1875 in | D: .3125 in | B: .1250 in | Cr: 391 N | Cor: 142 N
DDRI-6632Zd: .1875 in | D: .3750 in | B: .1250 in | Cr: 712 N | Cor: 271 N
DDRI-6632ZZd: .1875 in | D: .3750 in | B: .1250 in | Cr: 712 N | Cor: 271 N
DDR-3Zd: .1875 in | D: .5000 in | B: .1960 in | Cr: 1306 N | Cor: 487 N
DDR-3ZZd: .1875 in | D: .5000 in | B: .1960 in | Cr: 1306 N | Cor: 487 N
DDRI-614Zd: .2500 in | D: .3750 in | B: .1250 in | Cr: 417 N | Cor: 205 N
DDRI-614ZZd: .2500 in | D: .3750 in | B: .1250 in | Cr: 417 N | Cor: 205 N
DDRI-814Zd: .2500 in | D: .5000 in | B: .1250 in | Cr: 828 N | Cor: 374 N
DDRI-814ZZd: .2500 in | D: .5000 in | B: .1875 in | Cr: 828 N | Cor: 374 N
DDR-4Zd: .2500 in | D: .6250 in | B: .1960 in | Cr: 1470 N | Cor: 599 N
DDR-4ZZd: .2500 in | D: .6250 in | B: .1960 in | Cr: 1470 N | Cor: 599 N
DDRI-1214Zd: .2500 in | D: .7500 in | B: .2812 in | Cr: 2411 N | Cor: 912 N
DDRI-1214ZZd: .2500 in | D: .7500 in | B: .2812 in | Cr: 2411 N | Cor: 912 N
DDRI-8516Zd: .3125 in | D: .5000 in | B: .1562 in | Cr: 878 N | Cor: 419 N
DDRI-8516ZZd: .3125 in | D: .5000 in | B: .1562 in | Cr: 878 N | Cor: 419 N
DDRI-1038Zd: .3750 in | D: .6250 in | B: .1562 in | Cr: 906 N | Cor: 477 N
DDRI-1038ZZd: .3750 in | D: .6250 in | B: .1562 in | Cr: 906 N | Cor: 477 N
DDRI-1438Zd: .3750 in | D: .8750 in | B: .2812 in | Cr: 3297 N | Cor: 1368 N
DDRI-1438ZZd: .3750 in | D: .8750 in | B: .2812 in | Cr: 3297 N | Cor: 1368 N
DDRI-1212Zd: .5000 in | D: .7500 in | B: .1562 in | Cr: 1051 N | Cor: 662 N
DDRI-1212ZZd: .5000 in | D: .7500 in | B: .1562 in | Cr: 1051 N | Cor: 662 N
DDRI-1812Zd: .5000 in | D: 1.1250 in | B: .3125 in | Cr: 5113 N | Cor: 2387 N
DDRI-1812ZZd: .5000 in | D: 1.1250 in | B: .3125 in | Cr: 5113 N | Cor: 2387 N
DDRI-1458Zd: .6250 in | D: .8750 in | B: .1562 in | Cr: 1092 N | Cor: 742 N
DDRI-1458ZZd: .6250 in | D: .8750 in | B: .1562 in | Cr: 1092 N | Cor: 742 N
DDRI-1634Zd: .7500 in | D: 1.0000 in | B: .1562 in | Cr: 1204 N | Cor: 895 N
DDRI-1634ZZd: .7500 in | D: 1.0000 in | B: .1562 in | Cr: 1204 N | Cor: 895 N

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