LMB12UU Linear Busing LBB12UU Linear Ball Bearing 19.05x31.75x41.275mm

1. Product Overview
LMB12UU is standard round type linear motion ball bushing with 12mm inner bore, widely applied to linear slide transmission positions of CNC equipment, 3D printers, automated packaging machinery and light industrial automation production lines.
The whole bearing adopts integrated outer steel shell + multiple groups of circulating steel ball retainer structure, built-in self-lubricating grease storage tank, double side rubber dust-proof seals marked UU. It realizes unlimited reciprocating linear sliding motion on matching 12mm smooth optical shaft, small sliding friction resistance, stable running precision and low operating noise.
Outer shell adopts high-strength seamless steel pipe precision stamping forming, steel balls are fully quenched GCr15 bearing steel with mirror polishing surface. The retainer evenly separates circulating balls to avoid collision and jamming during high-speed reciprocating movement. Compact round outer contour, convenient direct press-fit installation into standard round aluminum sliding seat, simple assembly and later disassembly maintenance.

2. Technical Specifications

3. Core Advantages

1. Standard LMB12 round outer size, universal interchangeable with global 12mm linear ball bearings, perfectly matched standard linear sliding seat without structural modification.
2. UU double-sided rubber dust seal structure, block dust, fiber debris and fine particle pollutants, prevent internal grease loss and steel ball rusting, extend service life in workshop environment.
3. Circulating steel ball infinite reciprocating sliding design, rolling friction instead of sliding friction, small resistance, energy saving and smooth operation for high-speed automation equipment.
4. PA integrated retainer evenly isolate each group of steel balls, eliminate ball collision noise, avoid steel ball falling off under long-time frequent reciprocating motion.
5. Mirror superfinished GCr15 steel balls, uniform contact stress distribution, outstanding wear resistance, stable long-term repeated linear transmission precision.
6. Integrated outer steel shell with high structural rigidity, not easy to deform after press fitting into sliding seat, maintain long-term linear movement straightness.
7. Built-in grease storage structure inside the bushing, long service cycle between refueling, reduce regular equipment maintenance frequency.
8. Comprehensive customized service: stainless steel anti-rust upgrade, OEM laser marking on outer surface, neutral export carton anti-rust packaging, high temperature anti-wear grease pre-filling.

4. Application Scenarios

LMB12UU 12mm round linear ball bearing is core precision linear transmission spare part for light automation and numerical control equipment:

• Desktop CNC engraving machine, small milling machine linear slide support assemblies
• FDM 3D printer X/Y/Z axis reciprocating sliding matching units
• Automatic labeling machine, carton packaging machine light load linear moving positions
• Electronic product assembly equipment, small automated feeding manipulator sliding components
• Medical automation equipment, laboratory testing instrument precision linear guide bearings
• Aftermarket interchangeable LMB series standard round linear ball bushing

Cost-effective low friction precision linear bearing solution for automation equipment manufacturers, CNC parts OEM and machinery maintenance factories bulk procurement.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience of LMB series standard round linear ball bearings including LMB12UU
• LMB12UU fully dimensionally interchangeable with international standard 12mm linear bushings, consistent sliding load rating, dust sealing and reciprocating fatigue resistance standards.
• Complete OEM & ODM customization service supporting stainless steel anti-corrosion material and special high temperature resistant grease filling.
• Strict full pre-delivery inspection flow: outer shell dimensional tolerance test, steel ball hardness screening, long-cycle high-speed reciprocating sliding aging test, dust-proof sealing wear simulation test.
• Professional linear bearing engineering team provides one-on-one linear load calculation, optical shaft material matching and sliding seat press-fit installation technical guidance within 24 working hours.
• Stable mass production workshop with competitive factory direct bulk wholesale price for large-volume single model orders, long-term stable supply for global automation equipment and CNC spare parts buyers.

We specialize in circulating ball linear bushing structure, double-sided UU dust-proof sealing design, universal metric interchangeable mounting dimension standard and long-term win-win cooperation with automation transmission equipment suppliers.

6. Quality Control

• Raw material hardness and dimensional inspection for cold drawn steel outer shell, PA retainer and GCr15 steel ball blanks
• Outer pipe precision cutting, internal hole fine grinding and deburring process for linear bushing outer shell
• Steel ball high-temperature quenching, mirror polishing and automatic high-precision sorting production line
• Plastic retainer injection molding, steel ball automatic circulating assembly and double side UU rubber seal press-fitting process, strictly control ball running clearance
• Targeted classified performance testing: LMB12UU long-cycle high-speed reciprocating sliding aging test, repeated dust particle sealing durability test, continuous light load precision wear detection
• Full dimensional tolerance, surface burr and sealing tightness recheck before anti-rust oil coating and export carton packaging shipment

Every production batch of LMB12UU linear bearings undergoes full sampling CNC slide reciprocating simulation test to guarantee stable long-term smooth low-noise linear sliding performance in automation and numerical control equipment.

7. Get A Quote Now

If you need LMB12UU 12mm double dust seal linear ball bushings for CNC engraving machine production, 3D printer assembly and automation equipment maintenance bulk matching, send your purchase inquiry directly.
You will receive full professional supporting services after submitting inquiry:

• Fast official factory sealed formal quotation reply within 24 working hours
• One-on-one linear dynamic/static load calculation, optical shaft hardness selection and sliding seat press-fit installation technical guidance from professional linear bearing engineers
• Customized bearing performance solutions including stainless steel anti-rust upgrade and high-temperature resistant grease options
• Competitive direct factory bulk wholesale price for large-volume LMB12UU single model orders

Provide your required purchase quantity, equipment reciprocating speed and workshop dust working environment to obtain detailed formal quotation document.

8. FAQ

1. Q1: What does UU mean in LMB12UU?
   A1: UU stands for double-sided rubber dust-proof seals on both ends of the linear bushing, used to isolate dust and prevent internal grease leakage.
2. Q2: What shaft does LMB12UU match?
   A2: It is designed for 12mm diameter chrome-plated linear optical shaft, can only realize linear sliding movement, cannot bear rotary load.
3. Q3: What is the difference between LMB series and LM series linear bearings?
   A3: LMB is standard round outer diameter linear bushing, LM has flange positioning structure; LMB12UU is installed into separate round sliding seat for positioning.