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Ball Screw

Optimized Efficiency

Ball screws offer a highly efficient means of converting rotary motion to linear motion. A ball screw is an improvement over an acme screw with regards to speed, accuracy, and efficiency. Precision ball screws have a number of bearing balls that transfer the load between the nut and screw. For convenience our ball screws can be supplied completely machined and assembled with nuts, flanges, wipers and EZZE-MOUNTS.

- Improves speed, force, and duty cycle - Heavier loads
- Longer and predictable life cycle - High efficiency (low friction)
- Requires les motor power - Wide range of sizes
- Greater accuracy - State-of-the-art ball return mechanisms

 

Should a standard assembly not fit the application, Nook can machine the screw to your specific design requirements. Custom sizes and configurations are available.

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Engineering Calculators and Resources

 

Helpful ball screw related technical resources.

Ball Screw - Inch Precision Accuracy (SGT)

Material Surface Lead Accuracy Screw Diameter Screw Lengths
Alloy Polished ± 0.0005 in/ft 0.631" to 2.500" Up to 10'

Ball Screw - Inch Precision Accuracy (SGT)

Threads are ground from high carbon alloy steel that has been induction heat treated to a depth greater than the thread.

  • Standard lead accuracy: ±.0005 in/ft
  • Standard stocked ball screws are supplied with internally preloaded nuts which must be factory assembled.
  • Ground ball screws are used for applications that require smooth operation, precise positioning, and repeatability.

Part Number Reference

Ball Screw - Inch Standard Accuracy (SRT)

Material Surface Lead Accuracy Screw Diameter Screw Lengths
Alloy Black ± 0.004 in/ft 0.375" to 2.500" Up to 24'
Alloy Black ± 0.008 in/ft 3.000" to 6.000" Up to 24'
Stainless Polished ± 0.004 in/ft 0.375" to 1.000" Up to 24'

Ball Screw - Inch Standard Accuracy (SRT)

Standard Rolled Thread (sometimes referred to as commercial or transport type) ball screws offer the low friction advantage of antifriction screws at lower cost. They are capable of higher speeds and longer predictable life when compared to similar acme type lead screws.

  • Standard lead accuracy: ±.004 in/ft
  • Leads from .125” to 1.875”
  • Offered with OD threaded, non-preloaded ball nuts. 
  • Some sizes available with integral flange nuts and/or with double nuts with spring loaded adjustable preloading feature for eliminating backlash.

Part Number Reference

Ball Screw - Inch Precision Accuracy (XPR)

Ball Screw - Inch Precision Accuracy (XPR)

Precision Rolled thread ball screws are offered with leads of 0.200” to 0.500” depending on diameter. Nook uses the latest in CNC thread rolling technology and state of the art CNC induction heat treatment to manufacture a rolled screw with accuracy approaching precision ground at a substantially lower cost.

  • Standard lead accuracy: ±.001 in/ft
  • Fill the need for applications that don’t warrant the expense for ground screws but still require more precise positioning than that offered by commercial grade screws.
  • All are offered with internally preloaded non-adjustable ball nuts with either an integral flange or an OD thread which allows for the use of a custom flange to fit a specific need.

Part Number Reference

Ball Screw - Metric Standard Accuracy (MRT)

Ball Screw - Metric Standard Accuracy (MRT)

Rolled Ball Screw assemblies feature with precision ball nuts that are an economical, high-performance alternative to ground thread ball
screw assemblies. MRT Rolled Ball Screws are manufactured under tightly controlled conditions in the rolling process. Uniform heat treatment is monitored by temperature sensors to ensure
high quality and accurate lead.

  • Standard lead accuracy: ±100μm / 300mm
  • The ball nut assemblies ensure accuracy, zero backlash, consistent repeatability, and high system stiffness at low running torque. Ball nuts can be assembled with a selective fit to minimize lash.

Part Number Reference

Ball Screw - Metric Precision Accuracy (PMT)

Ball Screw - Precision Accuracy (PMT)

Precision Rolled Ball Screw assemblies feature precision ground preloaded ball nuts that are an economical, high-performance alternative to ground thread ball screw assemblies. They are manufactured under tightly controlled conditions in the rolling process. Uniform heat treatment is monitored by temperature sensors to ensure high quality and accurate lead.

  • Standard lead accuracy: ±25μm / 300mm
  • The preloaded ball nut assemblies ensure accuracy, zero backlash, consistent repeatability, and high system stiffness at low running torque. 
  • Ball nuts feature a unique solid preload that enhances system smoothness, and are factory-fit on the ball screws, providing a backlash-free system for long life.

Part Number Reference

Ball Screw - Precision Metric Ball Screw (PMBS™)

Precision Metric Ball Screw - Single Nut Assemblies

Nook Precision Metric Ball Screw Assemblies provide very high accuracy at reduced costs. High-lead precision rolled ball screws acheive maximum travel rates with repeatable positioning accuracy. 

All ball nuts are precision ground and engineered to
operate with precision rolled ball screws or precision ground (T3)
ball screws.

  • Lead accuracy classes of T10, T7, T5, and T3, which comply with the ISO 3408 ball screw standard.
  • Precision thread-rolling and heat treating technology
  • Wide range of diameters and leads
  • DIN-style flanges
  • Preloaded and clearance nuts
  • State-of-the-art ball return mechanisms
  • Integral wipers

Part Number Reference

Miniature Ball Screw - Metric

Miniature Ball Screw - Single Nut Assemblies

6mm - 14mm Diameter

Nook Industries is a leading producer of miniature ball screws, offering a wide variety of sizes and configurations. The miniature product line is supplied as a complete assembly. Screw ends can be machined to customer requirements in nearly any diameter and length configuration.

Part Number Reference

Ball Screw Related Products

Ball Screw Related Products

Ball Screw End Supports

EZZE-MOUNT™ precision bearing blocks can be assembled to ball screws and lead screws screws, providing a complete solution for most linear motion applications. Both end bearing mounts and end machining are offered as a complete assembly.

Ball Screw End Machining

Linear motion applications utilizing a ball screw or an acme screw require end machining to be matched with precision bearing mounts. Nook offers both end bearing mounts and end machining as a complete assembly.

Linear Guidance

Nook Industries manufactures a full range of linear slide systems and slide systems components. The PowerTrax™ line of linear components includes solid shell LBB linear bearings, self-aligning EXCEL™ linear bearings, HG Hardened and Ground Shafting, Pillow Blocks and complete slide systems.

Ball Screw Lubricant

E-900 Ball Screw Lubricant may be used on both rolled and ground thread ball screws. E-900 will provide a lasting film for wear protection and resistance to corrosion. With an operating range of -65° to +375°F, E-900 has low starting torque characteristics and helps reduce inter-ball friction in ball screw assemblies.