A review on hand-arm vibration exposure and vibration transmissibility from power hand tools to hand-arm system

2016 ◽  
Vol 4 (1) ◽  
pp. 10
Author(s):  
Siddhartha Saha ◽  
Parveen Kalra
Keyword(s):  
Vibration Exposure ◽  
Hand Tools ◽  
Vibration Transmissibility ◽  
Power Hand Tools

Vibration Exposure for Selected Power Hand Tools Used in Automobile Assembly

AIHAJ ◽  
1990 ◽  
Vol 51 (9) ◽  
pp. 510-518 ◽  
Author(s):  
ROBERT G. RADWIN ◽  
THOMAS J. ARMSTRONG ◽  
ERNST VANBERGEIJK
Keyword(s):  
Vibration Exposure ◽  
Hand Tools ◽  
Automobile Assembly ◽  
Power Hand Tools

scholarly journals Vibration Exposure and Transmissibility on Dentist’s Anatomy: A Study of Micro Motors and Air-Turbines

2021 ◽  
Vol 18 (8) ◽  
pp. 4084
Author(s):  
Harish Kumar Banga ◽  
Pankaj Goel ◽  
Raman Kumar ◽  
Vikas Kumar ◽  
Parveen Kalra ◽  
...  
Keyword(s):  
Research Work ◽  
High Amplitude ◽  
Vibration Exposure ◽  
Body Parts ◽  
Descriptive Research ◽  
Air Turbine ◽  
Test Of Homogeneity ◽  
Hand Piece ◽  
Vibration Transmissibility ◽  
Levene Test

The use of dental hand pieces endanger dentists to vibration exposure as they are subjected to very high amplitude and vibration frequency. This paper has envisaged a comparative analysis of vibration amplitudes and transmissibility during idling and drilling with micro motor (MM) and air-turbine (AT) hand pieces. The study aims to identify the mean difference in vibration amplitudes during idling, explore different grasp forces while drilling with irrigant injection by the dentist, and various vibration transmission of these hand pieces. The study utilized 22 separate frequency resonances on two new and eight used MMs and two new and eight used ATs of different brands by observing the investigator at 16 different dentist clinics. The study adopted a descriptive research design with non–probability sampling techniques for selecting dentists and hand pieces. Statistical methods like Levene Test of Homogeneity, Welch ANOVA, independent t-test, and Games–Howell test were utilized with SPSS version 22 and MS-Excel. The results reveal that vibration amplitudes and vibration transmissibility when measured at position 2 are higher than in another position 1. Vibrations during idling for used MMs are more than AT hand pieces, and the used MM (MUD) and used AT (AUA) hand pieces differ due to their obsolescence and over-usage. Vibration amplitudes increase every time with the tightening of grasping of the hand piece. Vibration amplitudes for each grasping style of MM hand piece differ from all other grasping styles of AT hand pieces. Routine exposure to consistent vibrations has ill physical, mental, and psychological effects on dentists. The used hand pieces more hazardous as compared to newer ones. The study suggests that these hand pieces must be replaced periodically, sufficient to break between two operations, especially after every hand piece usage. Hence, the present research work can be further extended by creating some control groups among dentists and then studying the vibration amplitude exposure of various dental hand pieces and subsequent transmissibility to their body parts.

Stress-Strain-Analysis of Grapevine Pruning with Powered and Non-Powered Hand Tools

2000 ◽  
Vol 44 (22) ◽  
pp. 639-642 ◽  
Author(s):  
Jurij Wakula ◽  
Thomas Beckmann ◽  
Michael Hett ◽  
Kurt Landau
Keyword(s):  
Strain Analysis ◽  
Stress Factors ◽  
Climate Condition ◽  
Hand Tools ◽  
Stress Strain ◽  
Repetitive Movements ◽  
Power Tools ◽  
Power Hand Tools ◽  
External Forces

Non-power and power cutting hand tools are mainly used every day in vineyards for grapevines pruning during 5 months (November - March). The grapevines pruning with the help of non-power tools is very stressful for wine growers. Repetitive movements combined with external forces in finger-hand-wrist-system, extreme positions in arm-shoulder-system, climate condition are some of the stress factors. Grapevines pruning with 5 manual prunes produced by 3 different manufacture and 2 power hand tools (electrically and pneumatically) were analysed. The results reveal that grapevines pruning with pneumatic and electric prunes is up to 30% more effective (according to productivity) than cutting with non-powered hand tools. At the same time is grapevines cutting with power tools more stressful as with non-powered one.

scholarly journals Vibration of Power Hand Tool and Discomfort Experience among Malaysian Industrial Workers

2013 ◽  
Vol 10 ◽  
pp. 313-317 ◽  
Author(s):  
Rahayu K. Seri ◽  
A. Nurulhuda ◽  
A. Rohana
Keyword(s):  
Industrial Workers ◽  
Hand Tools ◽  
Industrial Worker ◽  
Limit Value ◽  
Exposure Limit ◽  
Time Period ◽  
Hand Tool ◽  
Before And After ◽  
Long Time ◽  
Power Hand Tools

In reality, people who worked with power vibrating tools exposed with the vibrated syndrome that effect their normal life especially who involved for long time period. Hand-arm vibration (HAV) is a widespread hazard in many industries and occupations involving the use of handheld power tools or hand-fed machines. This paper describes a research and observation on the vibrating hand tool. The objective of this study is to measure and compare the grip strength and hand arm vibration before and after using the Ready-Reckoned standard for industrial workers. Continually, an analysis is conducted due to the pain and discomfort experience that face by the workers. This research also do the analysis about the effects of the vibration to the workers hand depend on the duration of handling the power hand tool. Hundred respondent was involved which 50 men and 50 women who had been identified as an industrial worker and working with power hand tools or machinery. The respondents were interviewed and answer Q-Survey that directly conducted at their workplace after doing the test. As the result, worker who works 8 hours per day, the exposure limit value (ELV) is 5m/s, it can cause fatal effects. Most of workers suffered with fingers that gone white on cold exposure and weakness in hand grip.

EVALUATION OF DIFFERENT TYPE OF GLOVE USING VIBRATING HAND TOOL

2015 ◽  
Vol 76 (6) ◽  
Author(s):  
Nurul Hanna Mas’aud ◽  
Bulan Abdullah
Keyword(s):  
Manufacturing Industry ◽  
Manufacturing Industries ◽  
Satisfaction Survey ◽  
Vibration Exposure ◽  
Satisfaction Level ◽  
Health Issues ◽  
Hand Tools ◽  
Hand Tool ◽  
Different Types ◽  
The Common

The paper presents satisfaction survey of the glove conditions while using vibrating hand tool in a manufacturing industry. The effects of vibration can cause health issues to the workers especially to those who are using vibrating hand tools. Hand held vibrating tools have become the common use in the manufacturing area. A study stated that many researchers have found that vibration exposures have become a common health problem in manufacturing industries. The research scope and objectives are to evaluate the satisfaction level of the workers using different types of gloves as well as to see how effective they are at reducing vibration exposure. The input data were collected by satisfaction survey among 30 respondents. There are three types of gloves conditions; (i) without glove, (ii) knitted glove and (iii) fingerless anti-vibration glove. The comparison of worker’s satisfaction level between these three conditions was summarized. It clearly showed that the use of fingerless anti-vibration glove is the most comfortable among the workers. The main advantage is that the fingers and thumb remain uncovered resulting in unconstructed movements.

scholarly journals Vibration transmissibility and apparent mass changes from vertical whole-body vibration exposure during stationary and propelled walking

2021 ◽  
Vol 90 ◽  
pp. 103283
Author(s):  
Delphine Chadefaux ◽  
Alex P. Moorhead ◽  
Pietro Marzaroli ◽  
Stefano Marelli ◽  
Enrico Marchetti ◽  
...  
Keyword(s):  
Whole Body Vibration ◽  
Whole Body ◽  
Vibration Exposure ◽  
Apparent Mass ◽  
Body Vibration ◽  
Vibration Transmissibility

Effect of short-time vibration exposure on work movements with carpenters' hand tools

1991 ◽  
Vol 8 (2) ◽  
pp. 125-134 ◽  
Author(s):  
Eva Hammarskjöld ◽  
Karin Harms-Ringdahl ◽  
Jan Ekholm ◽  
Björn Samuelson
Keyword(s):  
Vibration Exposure ◽  
Hand Tools ◽  
Short Time

Dynamics of Power Hand Tools on Operator Hand and Arm Stability

1994 ◽  
Vol 38 (10) ◽  
pp. 602-606 ◽  
Author(s):  
Seoungyeon Oh ◽  
Robert G. Radwin
Keyword(s):  
Perceived Exertion ◽  
Horizontal Distance ◽  
Subjective Ratings ◽  
Ratings Of Perceived Exertion ◽  
Hand Tools ◽  
Hand Tool ◽  
Power Hand Tools ◽  
Tool Dynamics

Threaded fastener tightening was studied to determine effects of tool dynamics (torque and build-up time) and workstation configuration (orientation, horizontal distance and height) on operator kinematics and ability to stabilize a right-angle power hand tool. Hand velocity, hand displacement, tool torque, and spindle angle were recorded during tool operation. Four subjects participated. Workstation factors and tool dynamics had significant effects on hand stability. The magnitude of hand velocity and displacement was significantly greater for (1) vertical work surfaces compared to horizontal work surfaces; (2) vertical work surfaces higher than 90 cm above the ground; (3) horizontal work surfaces 90 cm above the ground; (4) increasing torque levels, and (5) long torque build-up times. Subjective ratings of perceived exertion were greater for increasing torque levels, long build-up times, and increasing workstation heights. Perceived exertion was significantly related to hand velocity and displacement ( p<0.05), however, the strength of the correlation was small (R2 ranged between 0.01 and 0.10).

A comparison of the dynamic properties of transducer adapters for measurement of hand-transmitted vibration

2009 ◽  
Vol 223 (2) ◽  
pp. 345-351 ◽  
Author(s):  
C M Song ◽  
H-K Jang ◽  
J Chai
Keyword(s):  
Dynamic Characteristics ◽  
Grip Force ◽  
Dynamic Properties ◽  
Vibration Exposure ◽  
Frequency Range ◽  
Second Best ◽  
Best Estimate ◽  
Feed Force ◽  
Vibration Transmissibility ◽  
Exposure Levels

The dynamic characteristics of five types of widely used transducer adapters were compared in terms of vibration transmissibility between an accelerometer on the surface of the gripping area and another within each of the transducer adapters over a frequency range of 25–1250 Hz. Performance was also assessed from the ratio between two human vibration exposure levels, ahv, 1 and ahv, 2, measured using the two accelerometers over nine combinations of grip force and feed force. In this study, vibration transmissibility and ahv ratio of unity are considered. The vibration transmissibility and ahv ratio indicated that the flexible palm adapter provided the best estimate of vibration transmission to the hand. This transducer adapter exhibited the smallest deviation from unity for vibration transmissibility, which was <1.8 per cent over the frequency range, and ahv ratio, which was <4 per cent over nine combinations of grip and feed forces. From the investigation, the flexible palm adapter showed negligible distortion over the frequency range and high applicability, regardless of the gripping condition. The handle-type adapter provided the second-best estimate.

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