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Coef of Friction for ABS/SSteel - -Plastics Engineering ...
eng-tips› …› -Plastics Engineering ForumJun 02, 2007· I need a value for the coefficient of friction between ABS and stainless steel please, even a ballpark figure would be enough to get me started. I have had a goBallpark: 0.25 ± 0.15 Decent site: http ://roy mech.co.uk /Useful_Ta bles/Tribo logy/co_of _frict.htm Suggestion: contact ABS manufacturers (BASF, GE Plastics) or conduct your own testing. All you need is a fish scale or a method to determine the angle of a ramp. Regards, Cory Please see FAQ731-376: Eng-Tips Forum Policies for tips on how to make the best use of Eng-Tips Fora.This link shows that the dynamic coefficient of friction for many common thermoplastics is about 0.05. w ww.machini st-materia ls/com parison_ta ble_for_pl astics.htm ww w.machinis t-material s/imag es/Coeffic ient_of_Fr iction.gif This page specifically gives a value for ABS http:/ /matwe b/sear ch/Specifi cMaterial. asp?bassnu m=POMNIA41 COF 0.5 on dry ground steel; load =0.05MPa; speed =0.6 m/s There will be no accurate value for ABS because ABS is not one material but is very different depending on grade and manufacturer. For example it is made in very different ways by a totally different process if you compare Dow and BASF ABS. In addition to that ABS made by emulsion polymerisation will contain plenty of residual surfactant (such as stearate) that will act as a lubricant and change the coefficient of friction. Additionally, exposure to water would tend to leach out the surfactant leading to a changes in coefficient of friction over time. As ABS is rubber in SAN you might look for values for SAN and assume ABS is similar. There is not any memory with less satisfaction than the memory of some temptation we resisted. - James Branch CabellNice idea Cory. I have something like this from Bosch that will do the job nicely! w ww.amazon. com/Bosch- DWM40LK-Di gital-Prot ractor-Ext ension/dp/ B000BD7ADQ A digital spirit level. Just increase the angle until it slides. There is not any memory with less satisfaction than the memory of some temptation we resisted. - James Branch CabellThat is a nice product - I have never seen one like that as an off-the-shelf item. I have used a custom made one that had a motor to change the angle from zero to theta, where theta was the angle reached when sliding was detected by an integral sensor. Regards, Cory Please see FAQ731-376: Eng-Tips Forum Policies for tips on how to make the best use of Eng-Tips Fora.Thankyou CoryPad for such a quick response. The range is a bit broad. You obviously have a better grasp of the table than I do. I was thinking about maybe swapping the s/steel for chrome plating. The table was a bit odd as I expected chromium to be a lot lower. I was always told that chromium had one of the lowest coef of metals. What would you estimate the coef to be in that combination.I don't think a single number will do you much good. Friction varies widely based on materials and conditions, so you should ensure that your design can handle varying friction levels. I really think if this is critical, you need to perform testing. If it isn't critical, then aim for something in the middle (like 0.25) and then go do something else. Regards, Cory Please see FAQ731-376: Eng-Tips Forum Policies for tips on how to make the best use of Eng-Tips Fora.Its a small plastic pendulum mounted on a turned and polished shaft. It just hangs in space but it does need to hang freely like a plumb bob. At small angular changes the starting torque is too high and we cannot lubricate the assembly so we have to work with dry static coef's. We can change the injection moulding and we are considering UHMW polyethylene (0.12). PTFE (0.04)and PFA (0.06) are too expensive and bring other problems. The shaft can be specified with chrome plating (0.13). I expect that combination would give us a static coef in the area of 0.15 which is our next comparison. We can also consider turning the shaft in PTFE or similar but metal is preferred because of the vendor. Can you suggest other combinations that wont break the bank.You said you can't lubricate it. Does that include "dry" lubrication like PTFE particles applied from a spray can? htt p://lu bricants.c o.uk/ptfea ndgraphite spray.html The PTFE is carried in a solvent so that you can spray it. So if you use ABS be careful to test it to make sure the solvent doesn't induce environmental stress cracking in the ABS. A test would be to spray it on the ABS, let it dry, then hit it and see if its impact resistance is retained after exposure to the solvent. There is not any memory with less satisfaction than the memory of some temptation we resisted. - James Branch CabellThe solvent issue was expected to be a potential long term problem and so the decision was made to look at what we thought were more familiar solutions. It does set me thinking though and I will follow that up next week. Many thanks to you all. That was really useful and I do appreciate your help. ChriscadUse Acetal or POM. It is a lot harder and a bit heavier than the materials you have mentioned. It is relatively cheap, easy to mould, has very low static friction (your problem will be static, not dynamic friction) and has a self lubricating surface. It is also resistant to virtually all solvents. It can be improved by the addition of PTFE powder and silicon oil to the compound, but at a cost of course. It performs particularly well with nylon as the other surface. Molybdenum disulphide and graphite works well at improving bearing qualities of nylon. As nylons swell a little on absorption of moisture, this should be taken into account with the design if nylon is used for one component. DSM Engineering Plastics, LNP, and RTP Company all have tribology data on a large range of polymers in contact with other materials. Reading the data will reinforce the need to test as the numbers change a lot with variations in conditions Regards eng-tips, by professional engineers for professional engineers Please see FAQ731-376: Eng-Tips Forum Policies for tips on how to make the best use of Eng-Tips Fora.
What is the coefficient of friction of ABS plastic ...
May 17, 2007· What is the coefficient of friction for the gay marriage slippery slope argument? More questions What is a good resource for tabulated Coefficients of Kinetic friction (need not …Status: Resolved
Friction and Friction Coefficients - Engineering ToolBox
Friction theory and coefficients of friction for ice, aluminum, steel, graphite and other common materials and materials combinations Sponsored Links The friction force is the force exerted by a surface when an object moves across it - or makes an effort to move across it.
Friction coefficient ABS/ABS (from 3D printer) - -Plastics ...
eng-tips› …› -Plastics Engineering ForumHi ! Does someone know the friction coefficient between ABS and ABS (the one that we use for 3D printing) ? I am looking on the web for 1 hour but found nothing... only ABS/Steel..[PDF]
Investigation of friction between plastic parts
Investigation of friction between plastic parts Master’s thesis in Polymer tribology ERIK GUSTAFSSON Department of Applied Mechanics ... The plunger is made of either one polymer type or steel. Time span for tests varies in purpose to compare the friction at initial state with the in …
Friction - Wikipedia
The coefficient of friction depends on the materials used; for example, ice on steel has a low coefficient of friction, while rubber on pavement has a high coefficient of friction. Coefficients of friction range from near zero to greater than one.History·
Typical Coefficient of Friction Values for Common Materials
Typical Coefficient of Friction Values for Common Materials The static and kinetic friction coefficient values reference table shown in this article will be helpful …
Coefficient of friction, Rolling resistance, Air ...
The coefficient of friction between two materials in relative sliding may depend on contact pressure, surface roughness of the relative harder contact surface, temperature, sliding velocity and the type of lubricant whether the level of contamination.
Coefficient of Friction Reference Table - Engineer's Handbook
For any specific application the ideal method of determining the coefficient of friction is by trials. A short table is included above the main table to illustrate how the coefficient of friction is affected by surface films. ... Steel-Steel 0.78 0.27. 0.39. Copper-Copper 1.21 ...
Typical properties for Acrylonitrile Butadiene Styrene (ABS) including physical, mechanical, processing and other information. Generic ABS[PDF]
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Tire-Road Friction, Drag Factor and Deceleration Rudy Limpert and Dennis Andrews pcbrakeinc Short Paper PCB 1-2012 ... four brakes ABS modulating with our truck tires. What tire-road friction coefficient the braked tires of the subject truck experienced depends[PDF]
For example, glass fibre reinforcements wear the steel counter surface. A combination of dissimilar polymers is necessary to have acceptable wear resistance and low static friction. A bad heat conduction results in higher contact temperatures with degradation of the tribological aspects.
Static friction coefficient of some plastics against steel ...
Static friction coefficient of some plastics against steel and aluminum under different contact conditions
Coefficients of Friction for Steel - The Physics Factbook
The two main frictions used are static friction and kinetic friction. The coefficient of static friction for steel is around 0.6–0.15 and the coefficient of kinetic friction is around 0.09–0.6. The making of steel involves many processes and stages. The basic raw materials are coal, iron ore ...
Coefficients Of Friction - rommet
Steel Hub , Steel Shaft greased - Shrink fit ...C. of Friction = 0.08 to 0.16 The manufacturers of the proprietory keyless hub/shaft systems indicate that their products are based of a coefficient of friction of 0.12 for lightly oiled connections and 0.15 for dry assemblies.
Coefficient of friction plastics - practicalmachinist
practicalmachinist› …› Manufacturing Today› GeneralJan 08, 2013· ABS: (Acrylonitrile Butadiene Styrene) Provides good thermal and dimensional stability, as well as good scratch resistance. Therrnoforrnable haircell sheets have a textured surface that is excellent for hiding cuts and scratches. ... using friction to slow coasting things down is a stable system and easily tuned. using friction to slow ...[PDF]
Abrasive Friction ABS - Centric Parts
The steel portion of a disc brake pad which contacts caliper piston(s) and to which the brake friction material is bonded. Backing plate provides the necessary …
Coefficient of Friction Equation and Table Chart ...
For example, static friction can prevent an object from sliding down a sloped surface. The coefficient of static friction, typically denoted as μ s , is usually higher than the coefficient of kinetic friction.
Friction Coefficient of Steel on Concrete or Grout ...
An experimental investigation was conducted to determine the coefficient of static friction between rolled steel plate and cast‐in‐place concrete or grout. Fifteen tests were performed under conditions that represented the interior and exterior bearing surfaces of a containment vessel. Test ...
Brakes: Friction | HowStuffWorks
auto.howstuffworks› …› Brakes› Brake TypesFriction - Friction is the key to making auto brakes work. Learn how friction works, what a coefficient of friction is and how friction applies to auto brakes.
Anti-lock braking system - Wikipedia
An anti-lock braking system (ABS) is a safety anti-skid braking system used on aircraft and on land vehicles, such as cars, motorcycles, trucks and buses. ABS operates by preventing the wheels from locking up during braking , thereby maintaining tractive contact with the road surface.History·
Comparing Friction Loss in Steel, Copper and Plastic Pipes
Water flow and friction head loss (ft/100 ft) in steel, copper and PVC plastic pipes
Coefficient of Friction Testing of Plastics - MatWeb
Coefficient of Friction Testing of Plastics. The coefficient of friction, or COF, is determined by the ease with which two surfaces slide against each other.The dimensionless value of the coefficient of friction is the ratio of the force required to slide the surfaces to the force perpendicular to the surfaces.
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