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BFW - FLANGE (ROUND) BFW - FLANGE (TRIANGULAR) BFW - THREAD MOUNT

BFW SERIES - Conventional Style, without “Anti-Backlash” Function

 
 

Part Number Construction

Kerk BFW General Purpose Nut Assembly – 303 Stainless Steel Acme Lead Screw

The Kerk® BFW Series general purpose “free-wheeling” nut is for applications not requiring anti-backlash and wear compensation. It provides effective power transmission at minimum cost, and features long life, self-lubricating polyacetal acme lead screw nuts.  Kerkite® Composite Polymers are also available as standard options.

The secure mounting and convenience of a circular flange is standard on the BFW nuts with triangular flange and thread mounting as an option. Many custom configurations are available.

Acme lead screws are 303 stainless steel with extended life, custom Kerkote® TFE coating optional. Assemblies can be supplied cut-to-length or with ends machined to customer requirements.

LEAD SCREWS | COMPARISON CHART | SCREW SIZE LIST | NUT FEATURE MATRIX | NUT STYLES

BFW SERIES: FLANGE MOUNT (Round)

Screw Ø

Nut Ø

Nut Length

Flange Ø

Flange Thickness

Mounting Hole Ø

Bolt Circle Ø

Dynamic Load

CAD Model

A
in.
(mm)

B
in.
(mm)

C
in.
(mm)

D
in.
(mm)

E
in.
(mm)

F
in.
(mm)

G
in.
(mm)


lbs.
(kg)

 

1/4
(6)

.50
(12.7)

1.0
(25.4)

1.00
(25.4)

.19
(4.8)

.140
(3.56)

.750
(19.05)

50
(20)

Download

5/16
(8)

.63
(15.9)

1.0
(25.4)

1.13
(28.7)

.19
(4.8)

.140
(3.56)

.875
(22.23)

75
(35)

3/8
(10)

.63
(15.9)

1.0
(25.4)

1.13
(28.7)

.19
(4.8)

.140
(3.56)

.875
(22.23)

75
(35)

7/16
(11)

.75
(19.1)

1.5
(38)

1.50
(38.1)

.19
(4.8)

.203
(5.16)

1.125
(28.58)

90
(40)

1/2
(13)

.75
(19.1)

1.5
(38)

1.50
(38.1)

.19
(4.8)

.203
(5.16)

1.125
(28.58)

150
(68)

5/8
(16)

.88
(22.2)

1.5
(38)

1.50
(38.1)

.19
(4.8)

.203
(5.16)

1.188
(30.18)

225
(100)

3/4
(19)

1.12
(28.4)

2.0
(51)

1.75
(44.4)

.25
(6.4)

.203
(5.16)

1.438
(36.53)

350
(160)

7/8
(22)

1.50
(38.1)

2.0
(51)

2.25
(57.1)

.25
(6.4)

.203
(5.16)

1.875
(47.63)

500
(227)

15/16
(24)

1.50
(38.1)

2.0
(51)

2.25
(57.1)

.25
(6.4)

.203
(5.16)

1.875
(47.63)

500
(227)

BFW MINI Series — see MINI Series Products
Outline Drawing – Kerk Acme Lead Screw Assembly with BFW Round Flange Mount General Purpose Nut
BFW SERIES: FLANGE MOUNT (Triangular)

Screw Ø

Nut Ø

Nut Length

Flange Ø

Flange Thickness

Mounting Hole Ø

Bolt Circle Ø

Dynamic Load

CAD Model

A
in.
(mm)

B
in.
(mm)

C
in.
(mm)

D
in.
(mm)

E
in.
(mm)

F
in.
(mm)

G
in.
(mm)


lbs.
(kg)

 

1/4
(6)

.50
(12.7)

1.0
(25.4)

1.00
(25.4)

.17
(4.3)

.143
(3.63)

.750
(19.05)

50
(20)

Download

5/16
(8)

.50
(12.7)

1.9
(48.3)

1.50
(38.1)

.17
(4.3)

.143
(3.63)

.75
(19.1)

75
(35)

3/8
(10)

.66
(16.6)

1.9
(48.3)

1.50
(38.1)

.17
(4.3)

.197
(5.00)

1.125
(28.58)

75
(35)

7/16
(11)

.75
(19.1)

1.9
(48.3)

1.50
(38.1)

.17
(4.3)

.197
(5.00)

1.125
(28.58)

90
(40)

1/2
(13)

.75
(19.1)

1.9
(48.3)

1.50
(38.1)

.17
(4.3)

.197
(5.00)

1.125
(28.58)

150
(68)

BFW MINI Series — see MINI Series Products
Outline Drawing – Kerk Acme Lead Screw Assembly with BFW Triangle Flange Mount General Purpose Nut
BFW SERIES: THREAD MOUNT

Screw Ø

Nut Ø

Nut Length

Thread

Thread Length

Dynamic Load

CAD Model

A
in.
(mm)

B
in.
(mm)

C
in.
(mm)

M*
in.
(mm)

N
in.
(mm)


lbs.
(kg)

 

1/4
(6)

.63
(15.9)

1.0
(25.4)

9/16-18

.187
(4.75)

50
(20)

Download

5/16
(8)

.75
(19.1)

1.0
(25.4

5/8-18 

.250
(6.35)

75
(35)

3/8
(10)

.75
(19.1)

1.0
(25.4)

5/8-18

.250
(6.35)

75
(35)

7/16
(11)

1.00
(25.4)

1.5
(38)

15/16-16

.375
(9.53)

90
(40)

1/2
(13)

1.00
(25.4)

1.5
(38)

15/16-16

.375
(9.53)

150
(68)

5/8
(16)

1.00
(25.4)

1.5
(38)

15/16-16

.375
(9.53)

225
(100)

3/4
(19)

1.50
(38.1)

2.0
(51)

1 3/8-16

.500
(12.70)

350
(160)

7/8
(22)

1.50
(38.1)

2.0
(51)

1 3/8-16 

.500
(12.70)

500
(227)

15/16
(24)

1.50
(38.1)

2.0
(51)

1 3/8-16

.500
(12.70)

500
(227)

BFW MINI Series — see MINI Series Products
* metric available as required
Outline Drawing – Kerk Acme Lead Screw Assembly with BFW Thread Mount General Purpose Nut