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Ball Screw with Double Nut Fange Inner Circulation DFI
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ISUTAMI BEARINGS

Ball Screw with Double Nut Fange Inner Circulation DFI

Ball Screw with Double Nut Fange Inner Circulation DFI
ISUTAMI DFI ball screw with double inner circulation flanged nut assembly converts rotary motion into linear motion with minimal friction. It consists of a ball screw and two flanged ball screw nuts with recirculating ball bearings. The interface between the ball screw and the flanged nut is made by ball bearings, which are rolled in a matching spherical shape. The threaded shaft provides a matching helical raceway for the ball bearings, and the balls roll between the slots to provide the only contact between the nut and the screw.
Ball Screw with Double Nut Fange Inner Circulation DFI
ISUTAMI DFI ball screw with double inner circulation flanged nut assembly converts rotary motion into linear motion with minimal friction. It consists of a ball screw and two flanged ball screw nuts with recirculating ball bearings. The interface between the ball screw and the flanged nut is made by ball bearings, which are rolled in a matching spherical shape. The threaded shaft provides a matching helical raceway for the ball bearings, and the balls roll between the slots to provide the only contact between the nut and the screw.

Ball Screw with Double Nut Fange Inner Circulation DFI Size Chart

tBall Screw with Double Nut Fange Inner Circulation DFI

Model NO. OD Lead Bottom Diameter Mounting Hole Ball OD Number
of Ball
Round
MountingSizes Dynamic Rated Load(KN) Static Rated Load(KN)
D1 D4 D5 D6 L L1 L7 L8 L9 L10 M Cr Cor
DFI1605 16 5 13.1 A 3.175  28 38 5.5 48 82 10 10 40 10 5 M6 7.7  13.2 
DFI2005 20 5 17.2 36 47 6.6 58 85 44 8.6  17.1 
DFI2505 25 5 22.2 40 51 62 85 48 9.8  23.0 
DFI3205 32 5 29.2 50 65 9 93 108 12 62 6 16.9  51.0 
DFI3210 10 26.8 6.350  53 138 16 M8*1 26.1  53.1 
DFI4005 40 5 37.2 B 3.175  63 78 108 10 14 70 7 M6 19.0  66.2 
DFI4010 10 34.8 6.350  137 16 M8*1 30.1  71.0 
DFI5010 50 44.7 75 93 11 110 186 16 85 8 53.1  155.0 
DFI6310 63 56.7 90 108 125 188 18 95 9 60.7  206.0 
DFI8010 80 73.2 D 105 125 14 145 192 10 22 - 11 66.6  265.0 

Ball Screw with Double Nut Fange Inner Circulation DFI Features

For rolling elements, the ball screw drive has a very low coefficient of friction and is typically greater than 90% efficiency, in addition to being able to apply or withstand high thrust loads. The transmitted force is distributed over a large number of ball bearings, providing a lower relative load relative to each ball. They have tight tolerances and are therefore suitable for situations where high precision is required.The ball screw is a high efficiency feed screw that rolls between the screw shaft and nut. Compared with a conventional sliding screw, this product has drive torque of one-third or less, making it most suitable for saving drive motor power.

The ball nut determines the load and life of the ball screw assembly. The ratio of the number of threads in the ball nut circuit to the number of threads on the ball screw determines the extent to which the ball nut will reach fatigue failure (wear) faster than the ball screw.

DFI series ball screw is made through cold-rolled steel rolling process. Since the rolling process takes much less time than the ground ball screw manufacturing operation, the delivery time is also obviously reduced. The accuracy is C7 level, any 300 pitch error is less than 0.05mm, and the axial clearance is 0-0.05mm. The nominal diameter (D) of the ball screw is 16-32 mm, the lead (thread pitch) is 5 mm, and the lead of the SF3210-4 with a diameter of 32 mm is 10 mm. The number of steel ball rows inside the nut is 3 or 4, the diameter of the steel ball is 3.175mm, and the diameter of the steel ball inside the nut of SF3210-4 is 6.35mm. The height of the flange portion (L1) ranges from 10 to 12 mm, the overall length of the nut (L2) ranges from 42 to 90 mm, and the width (L3) ranges from 40 to 62 mm.

Ball screws are used in automobile power steering to translate rotary motion from an electric motor to axial motion of the steering rack. They are also used in machine tools, robots, and precision assembly equipment. High precision ball screws are used in steppers for semiconductor manufacturing. They are also incorporated into the actuator mechanisms of computer-controlled self-pleasure devices.
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