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Lim-Tec (Beijing) Transmission Equipment Co., Ltd.
Lim-Tec Ball Screw Linear Actuator LBP Series

Lim-Tec Ball Screw Linear Actuator LBP Series

Product catalog summary

1. Linear Actuator Model Selection and Duty Cycle Calculation

The document details the selection criteria for ACME screw and ball screw linear actuators based on duty cycle (Fu%) and load. Duty cycle is defined as the ratio of working time within a 10-minute interval. ACME screw actuators are recommended for low duty cycles (Fu < 30%), while ball screw actuators suit higher duty cycles (Fu > 50%) and offer longer lifespan. Specific series have defined duty cycle limits: LAM1-LAM7 (<10%), LAP (<30%), and LBP (100%). If stability or lifetime requirements are unmet, a larger actuator size should be chosen, with stability verified against provided curves.

2. Lifetime Calculation

The lifetime of ball screw actuators (LBP series) primarily depends on the ball screw component. The theoretical lifetime (L10) is calculated by L10 = (C / Fm)^3 × S, where C is the rated dynamic load, Fm the mean load, and S the ball screw lead. Load and speed variations are accounted for via reference curves.

3. Actuator Features and Mounting

Key features include high load capacity (10 kg to 20 tons), self-locking options, synchronous operation, compact design, precision control, and modular motor compatibility. Mounting options cover right-hand and left-hand inputs, multiple terminal box positions (standard and special), and various front attachments and limit devices.

4. Coding and Configuration

Actuators are coded by series, size, ratio, stroke, front attachment, limit device, input versions, motor power, RPM, terminal box position, and accessories. The LAP and LBP series include detailed motor power ratings, speeds, and accessory options such as brakes, encoders, limit switches, and safety clutches.

5. Self-Locking Characteristics

Static self-locking: Coefficient < 0.35; actuator resists external load without vibration.
Dynamic self-locking: Coefficient < 0.3 (opposite load) or < 0.25 (same load); actuator resists movement when powered off.
Uncertain self-locking: Coefficient between 0.35 and 0.55; actuator may move under increased load.
Non self-locking: Coefficient > 0.55; actuator moves under minimal load.

Brakes are required for non self-locking actuators.

6. Stability and Buckling Force

Stability curves relate stroke length and push load with a safety factor of 3. For strokes >300 mm, stability verification is necessary; for strokes >800 mm, tube lengths should be increased by 200 mm. Engineering consultation is recommended for stability concerns and special designs.

7. Performance Tables

Performance tables for LAP and LBP series provide parameters including speed, dynamic load, motor power, self-locking coefficient, weight, and incremental weight per 100 mm stroke. Tables cover DC 24V and AC 3-phase motors with various voltages and frequencies, specifying motor types, rated currents, and accessory options.

8. Additional Notes and Recommendations

LAP and LBP actuators can be driven by AC single-phase, DC, stepping, or servo motors; performance may vary and engineer consultation is advised.
Operating temperature range is -15°C to +40°C; special temperature requirements require consultation.
Axial error tolerance for 300 mm stroke actuators is 0.1 mm.
Catalog mainly lists ACME screw actuator parameters; ball screw actuator details require direct consultation.
Custom special designs are available upon request.

9. Mechanical Dimensions and Mounting Details

Detailed mechanical dimensions are provided for rod ends, standard heads, brake motor configurations, and mounting points to ensure proper installation and integration.

Overview of LBP Series Specifics

1. Actuator Series and Stroke Codes

LBP Series includes sizes LBP22, LBP25, LBP32, LBP35, LBP40, LBP56, and LBP200.
Stroke codes range from 100 mm to 800 mm for smaller models, extending to 2000 mm+ for larger models, with specific increments per model.

2. Dimensions and Mechanical Features

Each size has precise dimensional data including diameters, lengths, radii, and mounting hole sizes with tolerances (e.g., Ø10H7, Ø12H7).
Standard mounting components include rod ends (ROE), standard heads (BA), rear brackets (SP), clevis ends (FO), ball joints (TS), and flange ends (FL).
For strokes between 800 mm and 1500 mm, external tube and push rod lengths increase by 200 mm; strokes beyond 1500 mm (or 2200 mm for LBP200) require engineering consultation.

3. Limit Switch Options

Configurations include no limit switches, external limit switches (FCE), magnetic reed switches (FCM), and inductive proximity switches (FCP).
LBP22 series does not support FCM switches.

4. Motor and Brake Options

Standard and brake motor versions are supported, with brake motors having increased length dimensions.
Motor flange sizes and mounting details are specified, including J2 AC flange sizes (e.g., 80B5, 90B5).

5. Mounting and Attachment Details

Standard mounting includes rod ends and rear brackets; front attachments include clevis ends, ball joints, and flange ends, all evenly spaced.
Precise dimensions for mounting holes, radii, and shaft diameters ensure compatibility.

6. Notes and Recommendations

For strokes exceeding 1500 mm (or 2200 mm for LBP200), consultation with Lim-Tec engineers is mandatory.
Dimension increments for longer strokes are standardized to maintain performance.
Wiring color codes (Brown, Blue) are specified for switch connections.

7. Summary of Critical Parameters

Stroke codes and actual stroke lengths with increments and maximum limits.
Diameter and mounting hole specifications with precise tolerances.
Switch compatibility per model (FCM, FCP, FCE).
Motor configurations including standard and brake motor dimensions.
Extension lengths for long strokes with additional tube and push rod lengths.

Conclusion

This document is a comprehensive technical reference for selecting, configuring, and mounting LBP Series Linear Actuators. It emphasizes precise dimensional data, compatibility with various motor and switch options, and guidelines for extended stroke lengths. Users are advised to consult Lim-Tec engineers for custom requirements beyond standard specifications.

Catalog excerpts

Lim-Tec Ball Screw Linear Actuator LBP Series-1

Linear actuator model selection Check duty cycle Duty cycle Fu% ACME screw linear actuator Actual load speed and stroke requirement Considering lifespan and overheat Ball screw actuator is recommend Ball screw actuator Model pre-select Check the stability according to curve page 12 Choose a bigger size if stability can not meet requirement. Ball screw actuator or not final confirmation Input version Fu%=(t2+t4+t6) / 10min Fu%= Working Percentage within 10min T2.t4.t6 : working time T1,t3,t5: waiting time Input position Duty cycle calculation Choose a bigger size if stability can not meet requirement. lifetime calculation If not ball screw actuator Front Attachment Motor accessory Limit Switch Duty cycle calculation

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Lim-Tec Ball Screw Linear Actuator LBP Series-2

Lifetime calculation The lifetime of Ball screw linear LBP series depends on the lifetime of ball screw and worm gear and shaft, we just need to calculate the lifetime of screw, worm gear and shaft will wear but normally lifetime is longer than screw. Nut lifetime calculation: L10=(C / Fm)3xS L10: theoretic lifetime km C: Rated dynamic load N Fm: mean load N S: Ball screw lead mm Fm mean load calcuation: Load N F1 Load and speed changing curve Storke mm LIM-TEC BEIJING TRANSMISSION EQUIPMENT CO.,LTD.

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Lim-Tec Ball Screw Linear Actuator LBP Series-3

Coding Linear actuator category High load capacity, Self-Locking, Synchronous Compact Size Precision control, multiple positioning Continuous duty cycle equipped with Ball screw Modularized combination of various of motor Push load range: 10kg to 20 tons LAP Acme Screw Series / LBP Ball Screw Series Mounting Position Terminal Box Position:W（Standard） E,N,S（Special） LH Left Hand Input （On request） RH Right Hand Input

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Lim-Tec Ball Screw Linear Actuator LBP Series-4

Note:standard motors with insulation class F and protection IP55, Protection class of Brake IP54. Thermal protection Limit Switch Reed switch Safety clutch Series Size Ratio Stroke Front Attachment Limit Device Input Versions Input Shaft Motor Power RPM Terminal Box Position Accessories mm kW rpm Brake LAP Series 22 H1 50 BA Standard head P1 Single input shaft RH Right hand DC12V 0.06 W standard BRE Rear bracket LBP Series 25 H2 100 ROE Rod end P2 Double input shaft LH Left hand DC24V 0.09 NSE SP Intermediate support flange 28 V1 200 FO Clevis end P3 Motor flange AC 1-PH 220V 0.12 900 FI Rear...

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Lim-Tec Ball Screw Linear Actuator LBP Series-5

Critical Buckling Force Graphs Cautions for choosing the model type of actuators: Self-locking conditions for the actuators: ◆ The percentage of the duty cycle within 10 minutes LAM series: 10% LAP22,25 series(acme screw actuator): 25% LAP28,32,35,40,56,63,80 series(acme screw actuator) : 30% The ball screw actuator:100% The duty cycle can be increased if the actual load is less than the rated loads, please consult with the engineers of Lim-tec for the specifics ◆ For the stroke exceeding 800mm, the length of the inner tube and the protective tube should be increased 200mm accordingly. ◆ For...

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Lim-Tec Ball Screw Linear Actuator LBP Series-6

LAP Series Performance Table Performance Table of LAP Series---With DC Motor 24V Rated Current A Self-locking Coefficient Motot Power Extra Weight per 100mm stroke kg Extra Weight per 100mm stroke kg Performance Table of LAP Series---With AC 3-Phase Motor Self-locking Coefficient Motot Power

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Lim-Tec Ball Screw Linear Actuator LBP Series-7

Motot Power Self-locking Coefficient LIM-TEC BEIJING TRANSMISSION EQUIPMENT CO.,LTD. Extra Weight per 100mm stroke kg

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Lim-Tec Ball Screw Linear Actuator LBP Series-8

LAP Series Performance Table Dynamic Load KN Motot Power Self-locking Coefficient Extra Weight per 100mm stroke kg Note:LAP Series linear actuator can be driven by AC 1-phase motor,DC motor,stepping motor,servomotor,but the perfomances will be changed,please consult with Lim-Tec’s engineers. Ambient temperature of LAP Series linear actuator is -15℃－+40℃,please consult with Lim-Tec’s engineers if the special temperature required. Performance Table of LBP Series---With DC Motor 24V Type Motot Power Rated Current Self-locking Coefficient Extra Weight per 100mm stroke kg Extra Weight per 100mm stroke...

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Lim-Tec Ball Screw Linear Actuator LBP Series-9

Motot Power Self-locking Coefficient Extra Weight per 100mm stroke kg Note:LBP Series linear actuator can be driven by AC 1-phase motor,DC motor,stepping motor,servomotor,but the perfomances will be changed,please consult with Lim-Tec’s engineers. Ambient temperature of LBP Series linear actuator is -15℃－+40℃,please consult with Lim-Tec’s engineers if the special temperature required. It is also available to supply LBP63/80/120. Rated dynamic load table: Rated dynamic load KN LIM-TEC BEIJING TRANSMISSION EQUIPMENT CO.,LTD.

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Lim-Tec Ball Screw Linear Actuator LBP Series-10

Overall Dimension of LBP Series Linear Actuator Dimension of LBP22 Without limit switches Actual Stroke With brake motor 239 Standard Head 205+Actual Stroke With brake motor 239 15 With brake motor 158 15 With brake motor 158 Actual Stroke With external limit switches FCE 96+Actual Stroke 96+Actual Stroke Actual Stroke Actual Stroke 77 Note:LBP22 Series actuator is no available for FCM limit switch Stroke Code Actual Stroke

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Lim-Tec Ball Screw Linear Actuator LBP Series-11

Dimension of LBP25 With magnetic reed switches FCM Actual Stroke With brake motor 226 LIM-TEC BEIJING TRANSMISSION EQUIPMENT CO.,LTD. Front Attachment Stroke Code Actual Stroke

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Lim-Tec Ball Screw Linear Actuator LBP Series-12

Overall Dimension of LBP Series Linear Actuator Dimension of LBP25 Without limit switches Dimension of LBP25 With external limit switches FCE With brake motor 226 Actual Stroke Stroke Code Actual Stroke Actual Stroke

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Lim-Tec Ball Screw Linear Actuator LBP Series-13

Dimension of LBP32 With magnetic reed switches FCM Actual Stroke Stroke Code Actual Stroke LIM-TEC BEIJING TRANSMISSION EQUIPMENT CO.,LTD. Front Attachment Note:If the stroke between 800mm-1500mm,the length of external tube & push rod will increase 200mm If the stroke exceed to 1500mm,please consult with Lim-Tec’

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Lim-Tec Ball Screw Linear Actuator LBP Series-14

Overall Dimension of LBP Series Linear Actuator Dimension of LBP32 Without limit switches Actual Stroke With external limit switches FCE Actual Stroke Stroke Code Actual Stroke Note:If the stroke between 800mm-1500mm,the length of external tube & push rod will increase 200mm If the stroke exceed to 1500mm,please consult with Lim-Tec’s engineers

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Lim-Tec Ball Screw Linear Actuator LBP Series-15

Dimension of LBP35 With magnetic reed switches FCM Actual Stroke Stroke Code Actual Stroke LIM-TEC BEIJING TRANSMISSION EQUIPMENT CO.,LTD. Front Attachment Note:If the stroke between 800mm-1500mm,the length of external tube & push rod will increase 200mm If the stroke exceed to 1500mm,please consult with Lim-Tec’

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