Traditional metal lead screw nuts are very heavy,easy to rust,high friction,high noise,while plastic lead nuts can effectively solve these problems and improve the lead screw performance.

Reasons to use plastic lead nuts  

(1) Light weight: plastic nuts are lighter than metal nuts,which can reduce the weight of machine equipmentand improve operation efficiency.

(2) Corrosion resistance:plastic nuts can be well used in humid or corrosive environments,so the  lead nut service life will extend.

(3) Low friction:the surface of the plastic nut is smooth,and friction coefficient is low,which can reduce energy loss and improve transmission efficiency.

(4) Good insulation performance:plastic nuts have good insulation performance,which can avoid short circuit or leakage of electrical equipment.

(5) Low price: The production cost of plastic nuts is low,and the price is relatively low,which can reduce the manufacturing cost of equipment.

Lead screw with plastic nuts application field

Plastic lead screw nuts may not be the most popular material,but for the right conditions,plastic nuts may be the best solution.For example,chemical industry,medical device,food processing and other industries.

The requirements of lead screw nuts in medical equipment are usually high,requiring nuts to be lightweight,non-toxic,odorless and easy to clean.Plastic nuts can meet these requirements,but also can effectively reduce the noise and friction of equipment operation, improve the equipment stability and reliability.

Plastic nut lead screw for syringe pump

Plastic nut lead screw for patient handling

In the food processing industry,plastic lead screw nuts are also widely used.Food processing equipment requires non-toxic and harmless materials,plastic nuts can ensure the health and safety of food processing equipment,and can effectively reduce the noise and friction of equipment operation, improve production efficiency.

Plastic nut lead screw for food press

Plastic nut lead screw for food vending machine

What are the lead nuts material options from ALM?

ALM popular plastic lead nut materials including PEEK, PEEK450G, POM, nylon.

(1)PEEK plastic nut

PEEK is one of the best heat-resistant materials among high-performance plastics.Even after 5000 hours at 260°C,the strength is almost the same as the initial state,and the thermal stability is excellent.As a result,PEEK has a long service life in harsh environments.

PEEK has excellent resistance to a wide range of organic solvents, oils, weak acids and bases, and is able to maintain strength over a wide range of temperatures and concentrations. PEEK has proven to be a difficult polymer to decolorize,swell,or break.

(2)PTFE plastic nut

PTFE generally referred to as Teflon®,it is a synthetic,nontoxic,fluorocarbon-based polymer that is widely used in many applications. PTFE’s low coefficient of friction,excellent electrical properties,high chemical resistance,and stability in wide temperature ranges make it a choice material for electrical and thermal applications.

(3)Delrin (POM) plastic nut

POM nut materialsb is semi-crystalline thermoplastics with high mechanical strength and rigidity. Acetal polymers have good sliding characteristics and excellent wear resistance, as well as low moisture absorption. Good dimensional stability and exceptionally good fatigue strength, as well as excellent processability,make POM polymers a versatile engineering material, even for complex components.

(4)Nylon plastic nut

Nylon is a synthetic fiber material,is a synthetic fiber material with excellent abrasion resistance,tear resistance,chemical resistance and other characteristics.However,the water absorption rate is high and it is easy to absorb water and swell.It is easy to soften and deform under high temperature environment.

ALM also developed a range of advanced nut materials,including custom-engineered polymers.Making the combination of lead screws and plastic nuts a viable,more cost-effective option.ALM can develop various lead screw and nut configurations that solve the challenges associated with heat,stress and wear. Contact our e-mail to find the right solution: sales@autolinearmotion.com

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