Cast Iron SNOE Plummer Block Housing SNOE 228 Pillow Block 140x570x355mm

1. Product Overview

SN0E228 is a self-aligning adjustable linear ball bearing, specially designed for precision linear motion transmission equipment. This linear bushing adopts built-in self-compensation clearance structure, which can automatically correct small parallelism deviation between the shaft and the mounting hole, avoiding jamming, abnormal noise and premature wear caused by assembly misalignment.

The whole bearing unit is composed of high carbon chromium steel circulating steel balls, reinforced steel retainer and precision quenched outer sleeve. All metal parts adopt integral quenching and ultra-precision mirror grinding process, with uniform ball track tolerance and smooth cyclic rolling movement. It features ultra-low friction, stable reciprocating linear motion, good dust-proof performance and long service life. Widely matched for CNC machine tools, automatic assembly lines, printing equipment, packaging machinery, medical precision instruments and measuring automation equipment.

2. Technical Specifications

Model: SN0E228
Nominal shaft diameter: 28mm
Outer sleeve outer diameter: 44mm
Overall length: 60mm
Structure: Self-aligning adjustable circulating linear ball bearing, integrated steel retainer
Raw material: GCr15 bearing steel for outer sleeve, steel ball and retainer
Standard internal clearance: CN normal clearance, C3 enlarged clearance customizable
Self-align compensation range: ±0.3mm parallel deviation correction capacity
Operating temperature range: -20℃ ~ 120℃
Single piece net weight: 0.112kg
Basic dynamic load rating: 12.8kN
Basic static load rating: 18.6kN
Max linear reciprocating speed: 1.2m/s
Complete installation dimension drawings, clearance adjustment operation guide and long-cycle reciprocating durability test reports can be provided upon customer request.

3. Core Advantages

• Built-in self-aligning adjustable structure, automatically compensate shaft and mounting hole parallel deviation, greatly reduce equipment assembly reject rate and early bearing failure.
• All structural parts adopt full quenched GCr15 bearing steel, high hardness, strong wear resistance, stable precision retention under long-time reciprocating operation.
• Ultra-smooth mirror grinding ball raceway + graded high-precision steel balls, ultra-low friction resistance, energy-saving stable linear movement without stuck.
• Reinforced closed steel retainer, effectively lock circulating steel balls, prevent ball loss during disassembly, maintenance and replacement.
• Integrated light dust-proof edge design, block cutting fluid, dust and fine debris from entering the ball track, extend service life in industrial workshop environment.
• Full customizable service support: C3 enlarged internal clearance, stainless steel anti-rust version, OEM laser marking on outer sleeve, neutral export carton anti-rust packaging.
• Compact integrated bushing design, small installation space occupation, convenient press-fit installation for standard linear bearing housings.
• Uniform surface passivation anti-corrosion treatment, excellent rust resistance for indoor normal humidity, light dust industrial working environments.

4. Application Scenarios

SN0E228 self-aligning linear ball bearing is core precision linear motion spare part for automation light industrial equipment:

• CNC engraving machine, milling machine, precision lathe sliding axis linear support assemblies
• Automatic feeding, picking and placing assembly line reciprocating sliding positioning units
• Medium-sized printing machinery paper feeding and tension roller linear guide components
• Automatic packaging equipment film conveying sliding support bearing positions
• Medical inspection instruments, precision measuring equipment small linear motion assemblies
• Aftermarket interchangeable 28mm shaft self-align series linear ball bearing
• Cost-effective deviation compensation linear motion bearing solution for CNC OEM, automation equipment factories and printing & packaging machinery bulk matching.

5. Why Choose GQZ Bearing

• 25 years professional manufacturing experience for full SN0E series self-aligning linear ball bearings including SN0E228
• SN0E228 fully dimensionally interchangeable with international standard self-align linear bushings, consistent self-compensation range, load rating and assembly tolerance indicators.
• Complete OEM & ODM customization service supporting C3 clearance upgrade, stainless steel anti-rust grade and special surface anti-rust treatment.
• Full strict pre-delivery inspection items: GCr15 hardness test, steel ball dimensional sorting inspection, repeated reciprocating fatigue test, high-speed long-cycle linear motion aging test.
• Professional linear bearing engineering team provides one-on-one clearance adjustment and shaft-housing matching installation technical guidance within 24 working hours.
• Stable mass production workshop with competitive bulk wholesale factory price for long-term CNC equipment factories, automation machinery suppliers and printing packaging equipment manufacturers.
• We focus on self-align deviation compensation structure, integrated circulating ball all-in-one bushing, compact space-saving layout and long-term win-win cooperation with global automation linear transmission spare parts buyers.

6. Quality Control

• Raw material chemical composition and hardness inspection of GCr15 bearing steel outer sleeve and retainer
• Precision stamping, cutting, quenching tempering and finish mirror grinding processing for linear bushing outer sleeve and ball raceway
• Steel ball precision screening, hardening and ultra-superfinishing, automatic dimensional sorting screening production line
• Steel retainer integrated stamping forming and automatic ball assembly procedure to evenly control internal ball gap
• Classified targeted performance testing: SN0E228 long-cycle medium-load reciprocating linear aging test, repeated self-align adjustment fatigue test, combined radial load deformation detection
• Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export carton packaging shipment
• Each production batch of SN0E228 bearings passes full sampling reciprocating linear load test to guarantee stable long-term self-aligning precision support performance inside CNC, automation, printing and packaging linear transmission equipment.

7. Get A Quote Now

If you need self-aligning adjustable SN0E228 linear ball bearings for CNC machine tools, automatic assembly lines and printing packaging automation equipment maintenance & OEM bulk matching, send your purchase inquiry directly.
You will receive complete professional supporting services after submitting your inquiry:

• Fast official factory formal quotation reply within 24 hours
• One-on-one self-align clearance adjustment operation & shaft housing matching installation technical guidance from professional SN0E series linear bearing engineers
• Customized bearing performance scheme suggestions including C3 enlarged clearance upgrade options
• Competitive direct factory bulk wholesale price for large quantity spare parts orders
• Send your required purchase quantity and equipment medium-load light dust working environment to obtain detailed sealed formal quotation document.

8. FAQ

1. Q1: What is the core structural feature of SN0E228 linear bearing?
   A1: It adopts built-in self-align adjustable circulating ball structure, which can automatically compensate small parallel assembly deviation between optical shaft and mounting hole to avoid sliding jamming.
2. Q2: Can SN0E228 be directly replaced with standard ordinary linear bearings?
   A2: Yes, the outer diameter and length dimensions fully match standard 28mm linear bushing housings, direct replacement without modifying mounting parts.
3. Q3: What equipment is SN0E228 widely applicable to?
   A3: Mainly matched with CNC machine sliding axes, automatic assembly line reciprocating sliding parts, printing and packaging conveying equipment, medical precision measuring instruments linear motion structures.