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Diameter 25mm Lead 25mm Trapezoidal Tr25x25 Pitch 5mm Lead Screw

Excellent service
Quality assurance
Customized service
Fast delivery:5~10 days
  • Tr25x25

  • ALM

  • 8483900090

Diameter 25mm Lead 25mm Trapezoidal Tr25x25 Pitch 5mm Lead Screw.The lead screw can operate in very challenging environments,including some conditions that the ball screw cannot withstand.Lead screw shafts can be made of carbon steel,stainless steel or aluminum,and they usually come with a surface coating to provide additional protection against contamination.Among the standard products,we also offer PTFE-based coatings that provide durability in harsh environments and provide lubrication for nuts without grease or oil.

Screw Material ASTM1045,SUS303,SUS304,SS316,SS316L
Nut material Brass,Tin bronze,Phosphor bronze,Aluminum bronze,POM,PEK,nylon,POK,Stainless steel,1045,Zinc alloy,Brass+Plastic,Aluminum alloy+Plastic,Brass+Steel,Self lubricating(No oil type)
Quality standard ISO2901-4,DIN103
Clearance 7e,higher precision is available upon request
Product Parameter

A broad range of lead nuts are available,other nut type or size can be made upon drawing

When selecting the right nut for an application,there are a few things to keep in mind.Bronze nuts provide superior service at high working loads.They should be well lubricated with a good quality,Extreme Pressure(EP)grease compatible with the operating environment.Plastic nuts can be used without lubrication and are popular for low load applications.

ALM lead screw

Other ready models are available

ALM super quality lead screw

Lead screw dimension

8mm lead screw

12 lead screw

Our Advantages
Free service Performance testing
Selection of auxiliary
Technical solution
Please contact the salesman for details

what you can get from ALM

Custom service

Stainless steel and other customized materials
Surface treatment
Custom lead nut and shaft end machining
Maintenance and assembly
Replace grease
Please contact the salesman for details
Product Applications

lead screw application

lead screw

 What’s the difference between lead screw designs?

In power transmission applications,there are two main types of screw drives:screw drives that use a recirculating ball or roller for applications requiring high rigidity,excellent positioning accuracy,and high duty cycle ratio,and screw drives that rely on sliding contact for applications requiring corrosion resistance,self-locking operation,and customizable nut designs.

The second type - screw drivers with sliding contact between the nut and the screw shaft - is called lead screw,Acme screw or trapezoidal screw.Although these names are often used interchangeably,they actually refer to different screw geometrics and sizes.Here is a breakdown of the different types of sliding contact screws and what the terms "lead screw," "Acme screw," and "trapezoidal screw" really mean.


Lead Screws

The most commonly used of the three terms "lead screw" refers only to a powered screw that relies on the sliding motion between the nut and the screw shaft.There are two variations of the lead screw:the screw with square thread and trapezoidal thread.


Lead screw designs for power transmission use almost exclusively trapezoidal threads,which are easier to manufacture and have higher load capacity than screws with square threads.However,trapezoidal threads do have higher friction and are therefore less efficient than the square thread form.

square or trapezoidal threads lead screw

The lead screw can have square or trapezoidal threads.


A power screw is a screw that transmits power by converting rotating motion into linear motion.The lead screw and ball screw are the types of power screws.

ACME Screws

As mentioned above,the lead screw for power transmission uses the trapezoidal thread form.But the trapezoidal screw design can be threaded at 29° or 30° angles,which means that the trapezoidal screw comes in two versions.

The first version(called the Acme screw)has a thread angle of 29° and is manufactured in inch size.Acme screw size is usually specified by the screw shaft diameter and the number of threads per inch or TPI.

 ACME lead screw 

Trapezoidal screw form with thread angle of 29°is called Acme screw,while trapezoidal screw form with thread angle of 30°is called trapezoidal screw.


Trapezoidal Screws

Trapezoidal screws also use the trapezoidal screw form of lead screw,but the trapezoidal screw thread angle is 30° and manufactured in metric size.The size of the trapezoidal screw is specified by the shaft diameter of the screw and the pitch of the screw thread.Trapezoidal screws are sometimes called "metric screw" or "metric Acme screw".

trapezoidal lead screws 

Acme screws and trapezoidal screws both use a trapezoidal thread form,but they have different thread angles.

ALM factory

ALM originally established in year of 2005.From a small factory,ALM nowadays has four production workshops for ball screw,lead screw,linear motor,linear actuator,linear guideways and related CNC machining parts for automation industry.Total areas over 7000 square meters,109 employees.Above 8 technical engineers are with over 20 years’ experience in linear motion filed.

ALM manufactures and supplies high quality linear motion components for customers in fields of aircraft, satellite,medical,Instrumentation,Robotics,Automobile,Electrical & Electronics,Textile,Medical,Food & Beverages,General Industry and so on.Customers cover more than 65 countries in Europe,North America,South Asia,Middle East,Africa,Latin America etc.With super quality and service,ALM has been widely recognized and highly valued by its high-end and picky customers, and thus remains at the top of their vendor lists.

ALM key production machines are imported,like high precision CNC grinding machine,3 axis,4 axis machining centre,internal and external grinding centre,CNC lathe.In addition,with advanced production management,ALM obtained the quality certificate ISO9001:2008 and IATF16949.And through our R&D department dedication over 16 years,we possess more than 26 national patents.

ALM's office

ALM office

ALM's workshop

ALM workshop

ALM product processing

product processing

ALM's warehouse

ALM warehouse

ALM product show

ALM product show

Customer Visit

ALM customer visit

Patent Certificate for invention and utility model

seidal product certificate

1.Why can ALM be your better option for linear motion components?

With more than 16 years of industry experience,quality assurance,factory directly price.

2.What is your main products ?

Our Main products are consist of ball screw,linear guide,lead screw,linear module and linear motor.

3.How to Custom-made?

Step1:Send us your drawing for checking.We will check the production feasibility.Our specially trained engineers will help you find out the best solution based on rich projects experience.

Step2:We make our production drawing for your checking to avoid misunderstanding.And to ensure each dimensions comply with your requirements.

Step3:Prepare for sample

Step4:After samples approved on your prototype.Move to mass production

4.When can I get the quotation?
We usually quote within 24 hours after we get your inquiry.If you are very urgent to get the price,please call us or tell us in your email so that we will regard your inquiry priority.





 No 1998 Jinfeng south road,Wuzhong district,Suzhou China.


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