Check out these videos on how to load a standard ball nut:
When the arbor will not slide over the machined journal
When the arbor will slide over the machined journal
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4 Reasons Why Your Ball Screw Assembly May Fail
Premature failure may be caused by any of the following:
- Misalignment of the ball nut to the screw which results in side loading or eccentric loading will reduce life. Additionally, this may cause the ball bearings to split or get flats on them. The ball bearings may even break out of the return tubes.
- Metal chips, dirt or debris in the ball nut may impede the call bearings from free circulation. The ball bearings may get flats on them because of skidding,
- Lack of lubrication. Proper lubrication will help dissipate heat and reduce metal-to-metal wear of components.
- Exceeding the ball nut critical speed can break pickup fingers off, causing the balls to come out of the nut. Exceeding the screw critical speed will cause the whip resulting in misalignment.
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Bevel Jack Selection Made Easy
Bevel gear jacks offer greater efficiency and rolling action than machine screw jacks, allowing for higher speeds or increased duty cycle. And there are no “standard” bevel gear jacks, each one is made to the specifications of the job. With this versatility, choosing the appropriate jack may be a long and tedious process. Until now…
Introducing the DesignGuidePro application from Nook Industries. The application makes for easy navigation when searching for design considerations for bevel jacks. Simply plug in the desired specifications, and the app will provide a list of products best-suited for the application.
DesignGuidePro puts the formulas in the palm of your hand; it’s free and user friendly. The application is compatible with both iOS and Android devices.
Make your bevel gear jack selections easier by clicking here.
Worm Jack Selection Made Easy
From locomotives to sawmills, worm gear jacks are ruggedly built to provide long duty life, high load capacity and flexible design. But with factors like tonnage, duty cycle and column strength, it can be tedious and difficult finding the right worm jack for your application. Until now.
Introducing the DesignGuidePro application from Nook Industries. The application makes for easy navigation when searching for design considerations for worm jacks. Simply plug in the desired specifications, and the app will provide a list of products best-suited for the application.
DesignGuidePro puts the formulas in the palm of your hand; it’s free and user friendly. The application is compatible with both iOS and Android devices.
Make your worm jack selections easier by clicking here.
Roller Screw 101
Offering high levels of load, speed and duty cycles, Roller Screw & Nut combinations can provide designers a long-lived and accurate solution for linear motion. They provide high axial rigidity, positioning accuracy, mechanical repeat-ability and low sensitivity to contamination. Commonly used in everything from artificial hearts to satellites, roller screws can also be found in radar arrays, optical equipment, transportation, measuring equipment and much more.
Knowing the basics of their anatomy and specifications can help you determine if roller screws are the right solution for you.
Anatomy
- Screw Shaft
- Nut
- Planetary Roller
- Ring Gear
- Pin
- Spacer Ring
- Spring Ring
- Calibrated Spacer
Specifications
Diameters – 8 to 75mm (.31 to 2.95″)
Leads – 2 to 42mm (.079 to 1.65″)
Precision Lead accuracy – IOS 5 (standard) ISO 3 & ISO 1
Materials – Medium carbon induction hardened alloy steel screws and High Grade bearing steel rollers should be specified
Nut Styles – Split or one-piece solid nuts in a cylindrical or flanged style