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THK BNF/ BIF Pricision Ball Screw

THK BNF/ BIF Pricision Ball Screw

Model No.

Screw
shaft OD
d

Lead
l

Ball
center-to-
center
diameter
dp

Thread
minor
diameter
d3

No. of
loaded
circuits/
Rows
×turns

Basic load rating

Note) 1
Rigidity
K
N /
μm

Ca
kN

C0a
kN

BNFN 5520-5

55

20

57.7

47.9

2×2.5

138.2

403.8

2550

BNFN 6310-2.5

63

10

64.75

57.7

1×2.5

35.4

111.7

1090

BNFN 6310-5

64.75

57.7

2×2.5

64.2

222.5

2100

BNFN 6310-7.5

64.75

57.7

3×2.5

90.9

334.2

3090

BNFN 6312A-2.5

12

65.25

56.3

1×2.5

48.1

139.2

1120

BNFN 6312A-5

65.25

56.3

2×2.5

87.4

278.3

2160

BNFN 6316-2.5

16

65.7

55.9

1×2.5

81.1

231.3

1470

BNFN 6316-5

65.7

55.9

2×2.5

147.0

462.6

2840

BNFN 6320-2.5

20

65.7

55.9

1×2.5

81.0

231.3

1470

BNFN 6320-5

65.7

55.9

2×2.5

147.0

463.5

2640

BNFN 7010-2.5

70

10

71.75

64.5

1×2.5

36.8

123.5

1180

BNFN 7010-5

71.75

64.5

2×2.5

66.9

247.0

2280

BNFN 7010-7.5

71.75

64.5

3×2.5

94.9

371.4

3350

BNFN 7012-2.5

12

72.0

64.2

1×2.5

43.5

139.2

1200

BNFN 7012-5

72.0

64.2

2×2.5

78.9

278.3

2320

BNFN 7012-7.5

72.0

64.2

3×2.5

111.7

417.5

3420

BNFN 7020-5

20

72.7

62.9

2×2.5

153.9

514.5

3090

BNFN 8010-2.5

80

10

81.75

75.2

1×2.5

38.9

141.1

1300

BNFN 8010-5

81.75

75.2

2×2.5

70.6

283.2

2530

BNFN 8010-7.5

81.75

75.2

3×2.5

100.0

424.3

3720

 

Model No.

Nut dimensions

Screw-shaft
inertial
moment
per mm
k
gcm2/mm

OD

Flange
diameter
D1

Overall
length
L

H

B1

B2

PCD

d1×d2×h

Oiling port
A

BNFN 5520-5

112

158

347

28

319

-

134

14×20×13

PT1/8

7.05×10-2

BNFN 6310-2.5

108

154

137

22

115

-

130

14×20×13

PT1/8

1.21×10-1

BNFN 6310-5

108

154

197

22

175

-

130

14×20×13

PT1/8

1.21×10-1

BNFN 6310-7.5

108

154

257

22

235

-

130

14×20×13

PT1/8

1.21×10-1

BNFN 6312A-2.5

115

161

159

22

137

-

137

14×20×13

PT1/8

1.21×10-1

BNFN 6312A-5

115

161

231

22

209

-

137

14×20×13

PT1/8

1.21×10-1

BNFN 6316-2.5

122

184

208

24

184

-

152

18×26×17.5

PT1/8

1.21×10-1

BNFN 6316-5

122

184

304

24

280

-

152

18×26×17.5

PT1/8

1.21×10-1

BNFN 6320-2.5

122

180

227

28

199

-

150

18×26×17.5

PT1/8

1.21×10-1

BNFN 6320-5

122

180

347

28

319

-

150

18×26×17.5

PT1/8

1.21×10-1

BNFN 7010-2.5

125

167

141

18

123

-

145

11×17.5×11

PT1/8

1.85×10-1

BNFN 7010-5

125

167

201

18

183

-

145

11×17.5×11

PT1/8

1.85×10-1

BNFN 7010-7.5

125

167

261

18

243

-

145

11×17.5×11

PT1/8

1.85×10-1

BNFN 7012-2.5

128

170

165

18

147

-

148

11×17.5×11

PT1/8

1.85×10-1

BNFN 7012-5

128

170

237

18

219

-

148

11×17.5×11

PT1/8

1.85×10-1

NFN 7012-7.5

128

170

309

18

291

-

148

11×17.5×11

PT1/8

1.85×10-1

BNFN 7020-5

130

186

325

28

297

-

158

18×26×17.5

PT1/8

1.85×10-1

BNFN 8010-2.5

130

176

137

22

115

-

152

14×20×13

PT1/8

3.16×10-1

BNFN 8010-5

130

176

197

22

175

-

152

14×20×13

PT1/8

3.16×10-1

BNFN 8010-7.5

130

176

257

22

235

-

152

14×20×13

PT1/8

3.16×10-1

 

Model No.

Screw
shaft OD
d

Lead
l

Ball center-to-
center diameter
dp

Thread minor
diameter
d3

No. of loaded
circuits/
Rows
×turns

Basic load rating

Note) 1
Rigidity
K
N /
μm

Ca
kN

C0a
kN

BNFN 8012-5

80

12

82.3

74.1

2×2.5

96.5

353.8

2620

BNFN 8020A-2.5

20

82.7

72.9

1×2.5

90.1

294.0

1770

BNFN 8020A-5

82.7

72.9

2×2.5

163.7

589.0

3430

BNFN 10020A-2.5

100

20

102.7

92.9

1×2.5

99.0

368.5

2110

BNFN 10020A-5

102.7

92.9

2×2.5

179.3

737.0

4080

BNFN 10020A-7.5

102.7

92.9

3×2.5

253.8

1105.4

6010

 

Model No.

Nut dimensions

Screw-shaft inertial
moment per mm
k
gcm2/mm

OD

Flange
diameter
D1

Overall
length
L

H

B1

B2

PCD

d1×d2×h

Oiling port
A

BNFN 8012-5

135

181

231

22

209

-

157

14×20×13

PT1/8

3.16×10-1

BNFN 8020A-2.5

143

204

227

28

199

-

172

18×26×17.5

PT1/8

3.16×10-1

BNFN 8020A-5

143

204

347

28

319

-

172

18×26×17.5

PT1/8

3.16×10-1

BNFN 10020A-2.5

170

243

231

32

199

-

205

22×32×21.5

PT1/8

7.71×10-1

BNFN 10020A-5

170

243

351

32

319

-

205

22×32×21.5

PT1/8

7.71×10-1

BNFN 10020A-7.5

170

243

471

32

439

-

205

22×32×21.5

PT1/8

7.71×10-1

 

1kN102kgf


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