TM
Ball Screw Assemblies
HelixLinear.com | 855-435-4958
HelixLinear.com | 855-435-4958
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About Helix Linear Technologies ... 2 Ball Screw Design Features ... 3 - 4 Ball Screw Part Confi gurations ... 5 - 6 Glossary and Technial Terms ... 7 Ball Screw Stepper Motor Linear Actuators ... 8
Index
Market Segments Served Partners
Certifi cations
Medical & Diagnostic Aerospace
Packaging Automotive
Electronics Transportation Tire Manufacture Entertainment
Semiconductor Military and Defense Factory Automation Pulp & Paper
Steel Chemical
Mobility/Patient Handling Agriculture/Food Handling
HelixLinear.com | 855-435-4958 HelixLinear.com | 855-435-4958
Helix Linear Technologies, Inc., Beachwood, Ohio USA
Culture
Our culture is rooted in teamwork and consists of smart, happy, and competitive professionals focused on manufacturing innovative products and delivering precise electromechanical linear motion solutions. We are in the people business, as well as the product business. Our talented employees make and sell our products, and our extraordinary scope of teamwork keeps our company healthy.
Operations
Our company delivers high-quality products and off ers world-class engineering support, solving the most demanding linear motion applications across multiple industries. We manufacture components and subsystem solutions to high volume OEMs and custom machine builders to ensuring their success.
Company
Helix Linear Technologies is a global supplier in the medical device, life science, security, semiconductor, aerospace, electromechanical, and defense industries.
Leading the linear motion industry by manufacturing the highest quality linear actuation solutions in the world, we focus on helping our customers be productive and profi table. Our innovative product design solves real- world linear motion issues and builds a foundation for long term success.
History
Helix Linear Technologies was founded in 2011 to meet the demand for high-quality lead screws and ball screws in the growing electromechanical actuation industry. Our rapid growth has included the addition of end-to-end linear actuator solutions, providing integrated solutions.
Helix Linear Technologies is the most high-tech lead screw manufacturing facility globally, producing the broadest product line of any lead screw and ball screw manufacturer. We off er precision rolled, milled, and ground screws in diameters from 1.6 mm to 152.4 mm and leads from .3 mm to 75 mm. When you need ball screws, Acme, trapezoidal, or high-helix lead screws with precision low-backlash nuts, or a state-of-the-art anti-backlash design, we deliver the highest quality coupled with exceptional value.
Helix Linear Technologies off ers a complete line of nuts in standard, anti-backlash, or custom designs with centralizing threads to match our precision lead screws, making our assemblies the lowest backlash product on the market. Our nuts come in various materials, including Acetal, PEEK, Bronze, Ertalyte, Carbon-Filled HPV, Turcite, Torlon, Vespel, PAI, PVDF, and medical-grade Acetal to fi t your specifi c use and environment.
2
The specifi cations and data in this publication are believed to be accurate and reliable. However, it is the responsibility of the product user to determine the suitability of Helix products for a specifi c application.
While defective products will be replaced without charge if promptly returned, no liability is assumed beyond such replacement.
Ball Screw Design Features
Static and Dynamic Load Ratings
The load ratings for Helix Linear Technologies ball screws are calculated based on commonly used DIN bases.
Materials
• Screw and balls: Steel 1.3501 (100 Cr6) or 1.1213 (Cf53)
• Nut: Steel 1.2714 (55NCrMoV7)
• Corrosion-resistant steel available (results in lower load ratings)
• Additional material options available up on request
• Coating for corrosion protection available upon request
Lead Accuracy
G9 = ≤ 0.1 mm /300 mm - Standard G7 = ≤ 0.052 mm/300 mm
G5 = ≤ 0.023 mm/300 mm
Ball Screws from Helix Linear Technologies are manufactured using a cold-forming process that enhances material strength, increases precision, and produces extremely high lead angles.
Off ered in diameters 4 mm to 40 mm, additional design ball screw characteristics include:
• High-accuracy and repeatability
• High effi ciency
• High load ratings (for both static and dynamic loads)
• Reduced energy consumption
• Low friction and stick-slip free operation
• Minimum wear
• High reliability and a long service life
• Available dirt wipers
Operating Temperature
-4° to 176° F (-20° to 176° C)
Consult and application engineer for additional temperature parameters and materials.
Effi ciency
Reduced Backlash
Reduced backlash ≤ 0.01 mm is available (for paired screw/nut assemblies, or those that have been mounted).
HIGH
MOVINGSPEED
HIGH LOAD CAPACITY
HIGH POSITION
ING ACCUCYRA
HIGH
EFFICIENCY CUSTOMIZABILITY
Efficiency (%)
Helix Angle (°) 100
90 80 70 60 50 40 30 20 10
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 30 35 40 45 50 55 60 Ball Screws
Trapezoidal Screws
Lead Screws
Helix Angle [°]
Efficiency [%]
Effi ciency for ball screws is ≥ 90%.
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HelixLinear.com | 855-435-4958 HelixLinear.com | 855-435-4958
Ball Nut Shapes
Mounting Thread (FG)
• Cost eff ective
• Turned outer diameter
• Pin wrench hole
Cylindrical (ZY)
• Cost eff ective
• Turned outer diameter
• Pin wrench hole
Flange (FB/FA)
• Mounting section and fl ange ground (FB)
• DIN-sytle fl ange 69051
• Flange type C available on request
Ball Return Systems
End Cap Ball Return (E/F)
• Ideal for over-square pitches
• Wipers fi rmly integrated into end caps
• High-performance technopolymer construction
• Cost-effi cient
Tube Ball Return (R)
• Return is fully integrated into nut body
• Designed for heavy loads
• Excellent for high-temperature applications
• Space-saving design
Single Thread Ball Return (I)
• High-performance technopolymer construction
• Additional materials available upon request
K
Technopolymer Wiper
B
Brush Wiper
F
Felt Wiper
*Available Upon Request
Ball Screw Nut Types
Wiper Options
Don't see what you're looking for? Custom designs are available.
Speak to a Helix Linear Technologies Application Engineer today.
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Ball Screw Assembly Part Number Confi guration
Ball Screw
Nominal Size (d0 x p) [mm]
Nut Shape ZY = Cylindrical
FG = Nut with mounting thread FB = Flange Nut
FA = Flange Nut
MS = Custom Design (reference drawing) Ball Return System
I = Single Thread R = Tube E = End Cap E F = End Cap F Thread Direction RH = Right Hand
LH = Left Hand (see chart p. X for availibility) Wipers
S = With Wipers N = Without Wipers
Ball Screw Overall Length [mm]
Lead Accuracy
G9 = ≤ 0.1 mm/300 mm (Standard) G7 = ≤ 0.052 mm /300 mm G5 = ≤ 0.023 mm /300 mm Backlash (Tmax)
A = Standard R = Reduced Screw End Machining O = No End Machining
E = Machined to Drawing Specification
Assembly
G = No Assembly (Screw and nut separate) E = Assembled to Drawing Specification
ECS 4 x 1 FG R RH S 350 G7 A E M
NUTSCREW
Ball Screw - Screw Only Ball Screw - Nut Only
ECS 4 x 1 RH 350 G7 O G ECN 4 x 1 FG R RH S A G
HelixLinear.com | 855-435-4958 HelixLinear.com | 855-435-4958
1 1.5
2 2.5
3 4 5 6 8 10 12 12.7
15 16 20 25 25.4
30 32 40 50
4 5 6 8 10 12 12.7 14 15 16 20 25 32 40
PITCH p [mm]
NOMINAL DIAMETER (d0) [mm]
Ball Screw Dimension Map Standard Range
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Ball Circle Diameter
- The diameter of the circle generated by the center of the bearing balls when in contact with the screw and nut.Root Diameter
- The diameter of the screw measured at the bottom of the thread. This is the diameter used for column strength, critical speed calculations and end machining considerations.Pitch
- The axial distance between threads. Pitch is equal to the lead in a single start screw.Lead
- The axial distance the nut advances in one revolution of the screw. The lead is equal to the pitch times the number of starts.PITCH × STARTS = LEAD
Screw Starts
- The number of independent threads on the screw shaft; typically one, two or four.Lead Accuracy
- Lead accuracy is the difference between the actual distance traveled versus the theoretical distance traveled based on lead.Bearing Ball Circuit
- The closed path that the bearing balls follow through the ball nut. Ball nuts have one or more circuits.Return Guide
- Component that allows the bearing ball to be picked up and returned to the beginning or end of the circuit.Load Carrying Balls
- The bearing balls in contact with ball nut and ball screw sharing the load.Land Diameter
- The outside diameter of the screw.This diameter is less than the ball circle diameter.
Ball screws offer an effi cient means of converting rotary motion to linear motion. Ball screw assemblies have a number of bearing balls that transfer the load between the nut and screw. The thread form in which the bearing balls ride is an ogival shape formed from two arcs of the same radius with offset centers. This form is also referred to as a gothic arch. See below.
Glossary and Technical Data
Ball Screw Load
Clearance Ball Contact Area
HIGH
MOVINGSPEED
HIGH LOAD CAPACITY
HIGH POSITION
ING ACCU
RACY
HIGH EFFICIENCY
HIGHCUSTOMIZABILITY
LEAD SCREWS BALL SCREWS
Efficiency (%)
Helix Angle (°) 100
90 80 70 60 50 40 30 20 10
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 30 35 40 45 50 55 60 Ball Screws
Trapezoidal Screws
Lead Screws
Helix Angle [°]
Efficiency [%]
HelixLinear.com | 855-435-4958 HelixLinear.com | 855-435-4958
Ball Screw Stepper Motor Linear Actuators Ball Screw Stepper Motor Linear Actuators
Today’s linear motion and automation challenges require higher precision and faster speeds. Ball screws matched with a ball screw stepper motor linear actuator from Helix Linear Technologies allow engineers to design highly repeatable motion control systems that perform at high duty-cycles.
Helix Linear ball screw stepper motor linear actuators are available in NEMA 8, 11, 14, 17, 23 and 34 motor frame sizes and double and single stack confi gurations.
Speak with an application engineer today, or visit HelixLinear.com for details.
Ball Screw Stepper Motor Linear Actuators
8
23200 Commerce Park Road | Beachwood, Ohio 44122 USA
