China
Africa
Explore chapters and articles related to this topic
Commercial Developments
Published in Leslie R. Rudnick, Synthetics, Mineral Oils, and Bio-Based Lubricants, 2020
Similarly, for forestry chainsaw oils, long-chain vegetable oil esters are used together with diester-based two stroke oils, for the chainsaw engine. These biodegradable ester-based products are now mandated in for use in forestry and agricultural application in Sweden, Norway, Finland, Denmark, Austria, Switzerland, and Germany and are gaining acceptance more widely in Europe and North America.
Make blades very sharp
Published in Michael Wiklund, Kimmy Ansems, Rachel Aronchick, Cory Costantino, Alix Dorfman, Brenda van Geel, Jonathan Kendler, Valerie Ng, Ruben Post, Jon Tilliss, Designing for Safe Use, 2019
Michael Wiklund, Kimmy Ansems, Rachel Aronchick, Cory Costantino, Alix Dorfman, Brenda van Geel, Jonathan Kendler, Valerie Ng, Ruben Post, Jon Tilliss
It’s quite convenient when products incorporating blades can sharpen themselves or have holders that do the trick. One particular manufacturer offers knives that are stored in a knife block containing slots that are engineered to sharpen a knife with every withdrawal and reinsertion.3 One chainsaw has a built-in mechanism that simply requires the user to pull a lever to expose the moving chain to an internally mounted sharpener.4 Chain-sharpening attachments are also available to ease the task and help ensure the tool cuts safely and effectively.
Eco Requirements for Lubricant Additives and Base Stocks
Published in Leslie R. Rudnick, Lubricant Additives, 2017
Manufacturers, suppliers, importers, or dealers of environmental preferable products participating the Environmental Choice Program (ECP) are awarded with the Canadian ecolabel, EcoLogo [43]. Guidelines for different product categories shall be fulfilled. These categories include, among others, automotive engine oil (recycled), bicycle chain oil (biodegradable), chainsaw lubricants (biodegradable and nontoxic), marine engine oil (inboard and outboard), and industrial lubricants (re-refined oil, synthetic oil, and vegetable oil–based). For each category, a different set of criteria must be fulfilled to qualify for the Canadian EcoLogo. For example, for synthetic industrial lubricants, biodegradability according to CEC-L33-T82 is required. The lubricant should not contain more than 0.1% petroleum oil (or additives containing petroleum oil) and any of the following metals: lead, zinc, chromium, magnesium, and vanadium [44]. The lubricant should not be labelled a Class D, poisonous and infectious material [45]. Technical performance is tested with various ASTM test methods—for example, ASTM D97 for pour point, ASTM D665 for rust, ASTM D525 for oxidation stability, and ASTM D892 for foam. In general, the Canadian EcoLogo concentrates on aquatic toxicity and biodegradability and technical performance, while the CO2 balance and renewability not in the focus. The Canadian EcoLogo is one of the few labels that include a life cycle analysis in its considerations for awarding products.
Investigation of abrasive saw kickback
Published in International Journal of Occupational Safety and Ergonomics, 2022
Steven Burcat, Brian Yue, Alexander Slocum, Tal Cohen
A variety of saws are used on construction sites, but they can generally be divided into two main categories: chainsaws and circular cutoff saws. Circular cutoff saws have a large-diameter blade that spins on a shaft in stationary bearings. Chainsaws have a chain that moves around a stationary saw bar, which has a small-diameter semicircle at the nose. For this study, two representative gas-powered saws – one circular cutoff saw (Stihl TS420; Stihl USA, USA) and one chainsaw (ICS 695XL; Blount International, USA) – were used. Additionally, an electric circular cutoff saw (ECCS) was used for initial tuning of the physics model and validation of the machine's data collection. This approach is similar to that taken by Arnold and Parmigiani [9], using electric and gas-powered saws and, subsequently, comparing data.
The effect of wood species on chainsaw vibrations during bucking operations
Published in International Journal of Forest Engineering, 2023
Masoud Feyzi, Ali Jafari, Hojat Ahmadi
The vibration acceleration peaks in the one-third octave bands coincide with the engine speed. Therefore, engine combustion is likely to be one of the main sources of chainsaw vibrations. These observations partially confirm that the mechanical vibrations in a chainsaw are mainly caused by the back-and-forth movement of the piston (Kovac et al. 2018). One alternative to the internal combustion engine chainsaw is the electric power chainsaw. Some contradicting results are obtained for the hand-arm vibrations of the electric chainsaws in comparison with those of the internal combustion chainsaws. Neri et al. (2018) concluded that electric power chainsaws could induce lower vibrations compared to the internal combustion engine chainsaws. The electric power chainsaws are divided into two types including battery-powered and wired chainsaws. Neri et al. (2018) reported that the vibrations of the battery-powered type were lower than those of the wired type. On the contrary, Rukat et al. (2018) reported that the frequency-weighted vibration acceleration values at both the front and rear handles were greater for the electric chainsaws compared to those for petrol chainsaws. In this study, the high speed of the engine possibly caused the peaks at the higher frequencies. Since the higher frequencies are weighted by lower factors, the influence of the engine combustion strikes on developing the VWF for this chainsaw is lower than that for other types of hand-held machines. The interaction between the chain and wood can reduce the engine speed. This can then expose an operator to the higher degrees of the ahv values. In addition, when the engine speed is lower than the nominal speed, a reduction in the engine power is created which can then lead to higher degrees of the ahv values. The above-mentioned points require further research to possibly determine the influence of the non-investigated parameters on both the level and characteristics of the induced vibrations by a chainsaw. This can eventually result in better designs of chainsaws in the light of minimizing the deleterious effects of vibrations on the health of the chainsaw operators.