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Kuroda Jena Tec Holdings Ltd
Ballscrew: Full Catalogue

Ballscrew: Full Catalogue

Product catalog summary

Overview

This technical document provides comprehensive specifications and performance data for ball screw assemblies ranging from 6 mm to 125 mm nominal diameters. It covers dimensional details, pitch options, thread directions, stiffness, load capacities, torque, and nut configurations (single and double nuts), supporting precise selection and integration in mechanical systems.

1. Size and Dimensional Specifications

The assemblies are categorized by nominal diameter ranges: 6–25 mm, 28–40 mm, 45–63 mm, and 67–125 mm. For each size, key parameters include nominal pitch, thread direction (right-hand or left-hand), ball diameter, shaft outer and core diameters, and minimum nut body diameter. Remarks specify starter thread counts and maximum number of starts, with all diameters representing minimum values to ensure compatibility.

2. Ball Screw Assembly Types and Features

The document distinguishes between single nut and double nut (pitch shift) assemblies. Single nuts are available with axial clearance or preload (play-free). Torque values have a standard tolerance of ±60%. Nut dimensions exclude wipers, which are typically PTFE and mounted on both sides for contamination protection.

3. Performance Parameters

Critical performance data include dynamic (Ca) and static (Coa) load ratings in Newtons or kiloNewtons, stiffness values (dynamic and static) in N/µm, moment load capacity (Mr) in Newton-meters, and drag torque values. These parameters vary with pitch and number of turns, enabling tailored selection based on load, stiffness, and frictional requirements.

4. Nut and Shaft Dimensions

Detailed dimensional data cover flange width (per DIN standards), minimum nut body diameter, and shaft diameters (core and outer). These dimensions are essential for mechanical integration, mounting, and ensuring assembly compatibility.

5. Special Notes and Remarks

Maximum allowed number of thread starts varies by size and pitch (commonly 2 to 4).
Material notes (e.g., SM) and compliance with European standards (EU numbers) are indicated for certain sizes.
Drag torque and stiffness values depend on pitch and number of turns, influencing design decisions.

6. JenaTec Precision Ball Screw Assembly Series

The document details multiple JenaTec BSA series, each with specific features and performance ranges:

JTd Series: Double nut with flange (DIN 69 051 - 5), diameters 16–80 mm, pitches mainly 5, 10, and some 20 mm. Preload ranges 1.02–15 kN, drag torque 0.07–4.8 Nm, dynamic load capacity up to 150 kN, static up to 352 kN, stiffness up to 1660 N/µm. Accuracy classes IT1 to IT7 define pitch error tolerances.
JTs Series: Single nut with soft flange (max. 41 HRC), diameters 16–80 mm, pitches 5, 10, 20 mm. Preload 0.42–15 kN, drag torque 0.03–4.8 Nm, dynamic load capacity up to 150 kN, stiffness up to 1790 N/µm.
JTg Series: Single nut with threaded flange, diameters 16–63 mm, pitches 5, 10, 20 mm. Preload 0.30–7.14 kN, drag torque 0.02–0.67 Nm, dynamic load capacity up to 80.5 kN, stiffness up to 1410 N/µm.
JTi Series: Inch dimensioned ball screws with soft flange nuts, diameters 0.625" to 2.25", pitches 0.200" to 0.500". Preload 0.42–15 kN, drag torque 0.03–2.35 Nm, dynamic load capacity up to 103 kN, stiffness up to 1350 N/µm.
JTm Series: Miniature single nut assemblies with 3 turns, diameters 6–16 mm, pitches 1–5 mm. Dynamic load capacity 0.7–6.8 kN, static load capacity 1.0–11.4 kN, available with or without wipers.

7. General Notes and Recommendations

Preload and drag torque values are critical for design and selection to balance precision and efficiency.
Accuracy classes IT1 to IT7 specify pitch error tolerances over 300 mm, guiding precision requirements.
PTFE wipers on both sides are standard in most models to protect against contamination.
Customization options include pitch shift nuts and various sizes upon request.
Ball deflection and hole pattern data assist in mechanical integration and performance prediction.

8. Critical Parameters Summary

Parameter	Range / Values	Notes
Diameter	6 mm to 80 mm (metric), 0.625" to 2.25" (inch)	Varies by series
Pitch	1 mm to 20 mm (metric), 0.200" to 0.500" (inch)	Multiple pitch options per series
Preload	0.3 kN to 15 kN	Depends on ball diameter or pitch
Drag Torque	0.02 Nm to 4.8 Nm	Varies by nut type and preload
Dynamic Load Capacity	0.7 kN to 150 kN	Indicates fatigue life under load
Static Load Capacity	1.0 kN to 352 kN	Maximum load without permanent deformation
Stiffness	165 N/µm to 1790 N/µm	Higher stiffness improves positional accuracy
Accuracy Classes	IT1 (6 µm) to IT7 (52 µm)	Defines pitch error tolerance over 300 mm

Conclusion

This document is a detailed technical reference for engineers selecting JenaTec ball screw assemblies. It provides essential mechanical, dimensional, and performance data across multiple series and configurations, enabling optimized design choices for precision, load capacity, stiffness, and integration in mechanical systems.

Catalog excerpts

Abkürzungen: RH Steigung rechts LH Steigung links Angaben sind minimale Durchmesser

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Abkürzungen: RH Steigung recht LH Steigung links Angaben sind minimale Durchmesser

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Abkürzungen RH Steigung recht LH Steigung links Angaben sind minimale Durchmesser Stand: November 2

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Abkürzungen RH Steigung recht LH Steigung links Angaben sind minimale Durchmesser

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Miniature Ball Screw Assemblies, Single nut Nominalpitch Ø Drag torque shaft shaft core outer Ø Ø Einzelmuttern mit Axialspiel oder spielfrei Drehmoment: Standardvorgabe +/- 60% Mutternabmessungen ohne Abstreifer

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Miniature Ball Screw Assemblies, Single nut Nomina l-Ø Capacities stat. Drag torque Einzelmuttern mit Axialspiel oder spielfrei Drehmoment: Standardvorgabe +/- 60% Mutternabmessungen ohne Abstreifer Stand: November 2

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Ball Screw Assemblies 16 bis 20 Double nut / Pitch shift nut Ball-Ø Drag torque Drag torque shaft outer shaft core Ø Ø pitch shift Double nut single nut nut

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Ball Screw Assemblies 25 Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange + JenaTec single nut width DIN

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Ball Screw Assemblies 32 Double nut / Pitch shift nut Ball-Ø Drag torque Drag torque shaft outer shaft Ø core Ø pitch shift Double nut single nut nut

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Ball Screw Assemblies 40 Nominalpitch Ø Double nut / Pitch shift nut shaft outer shaft core Ø Ø Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Ball Screw Assemblies 50 Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Ball Screw Assemblies 50 Nomina l-Ø Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Ball Screw Assemblies 63 Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Ball Screw Assemblies 63 Nomina l-Ø Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Ball Screw Assemblies 80 Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Ball Screw Assemblies 100 Double nut / Pitch shift nut Ball-Ø Drag torque Drag torque shaft outer shaft core Ø Ø pitch shift Double nut single nut nut

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Ball Screw Assemblies 125 Nomina l-Ø Double nut / Pitch shift nut Single nut Drag torque Drag torque Flange JenaTec+ single nut width DIN

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Standard Ball Screw Assemblies

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JTd serie Precision BSA with double nut after DIN 69 051 - 5 Hole pattern 1 Ball deflection PTFE wipers on both sides JTd serie Precision BSA, double nut with flange, accuracy class IT 1: 6µm, IT 3: 12µm, IT 5: 23µm und IT 7: 52 µm pitch error A Hole pattern Ball diameter Drag torque dyn. capacity stat. capacity [Nm] [kN] [kN] Order example: JTd1-2005: BSA 20 x 5, accuracy class IT1 = 6 µm accuracy class 300 mm thread length JTd5-6320: BSA 63 x 20, accuracy class IT5 = 23 µm Wegschwankung auf 300 mm thread length Remark: Most sizes as well as shift pitch nut on request available Stand: Juli

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JTs serie Precision BSA, nut with soft flange Ball deflection Soft flange - max. 41 HRC * Preload by ball diamter PTFE wipers on both sides ** Preload by pitch JTs serie: Precision BSA, nut with soft flange, accuracy class IT 1: 6µm, IT 3: 12µm, IT 5: 23µm und IT 7: 52 µm pitch error Diamter Ball diameter Order example: JTs1-3210: BSA 32 x 10, accuracy class IT1 = 6 µm pitch error across 300 mm thread length JTs5-6320: BSA 63 x 20, accuracy class IT5 = 23 µm pitch error across 300 mm thread length Stand: Juli

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JTg serie: BSA, Single nut with thread Ball deflection Can be assembled also with nut out of JTs series PTFE wipers on both sides JTg serie Precision BSA, single nut, accuracy class IT 1: 6µm, IT 3: 12µm, IT5: 23µm und IT 7: 52µm pitch error Article Ball diameter

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JTi serie: Precision BSA in Zoll, nut with soft flange Ball deflection Soft flange - max. 41 HRC * Preload by ball diamter PTFE wipers on both sides ** Preload by pitch JTi serie: Precision BSA in Zoll, nut with soft flange, accuracy class IT 1: 6µm, IT 3: 12µm, IT5: 23µm, IT7: 52µm pitch error Diamter Ball diameter Order example: JTi1-0,625x0,200: BSA 16 x 5,05; accuracy class IT1 = 6 µm pitch error accross 300 mm thread length JTi5-1,00x0,250: BSA 25 x 6,35; accuracy class IT5 = 23 µm pitch error accross 300 mm thread length Stand: Juli

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JTm serie: Miniature BSA, single nut with 3 turns Ball deflection JTm serie: Miniature BSA, single nut with 3 turns, accuracy class IT 1: 6µm, IT 3: 12µm, IT 5: 23µm und IT 7: 52 µm pitch error Diamter Ball diameter Order example: JTm1-08010: Miniature BSA 8 x 1, accuracy class IT1 = 6 µm pitch error accross 300 mm thread length JTm5-16025: Miniature BSA 16 x 2,5, accuracy class IT5 = 23 µm pitch eror accross 300 mm thread length Remark JTm7: Miniature BSA with play after customer demand All sizes also with wipers available

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