JAPAN MADE Slide Block HSR25R1SS HSR25R HSR25R2UU Linear Bearing 23x48x40mm

1.Product Overview

HSR25R series are medium-sized four-way equal load linear guide sliders matching 25mm width linear rails, featuring standard short block R structure with 4-row 45° circulating steel ball contact design. The four-direction equal load structure can evenly bear radial, reverse radial and lateral loads, absorb slight flatness errors of mounting surfaces and avoid sliding jamming and premature wear.

Three mainstream specifications for selection:

1. HSR25R: Basic open type without additional outer sealing structure, suitable for clean indoor low-dust closed automation equipment.
2. HSR25R2UU: Double-sided UU double lip rubber integrated seal, standard universal dustproof structure, block built-in standard lubrication channel, applicable to ordinary production workshop with slight dust and light oil mist.
3. HSR25R1SS: Reinforced SS composite metal double-layer heavy-duty seal, strong blocking performance for metal powder, cutting fluid and grinding debris, designed for harsh machining environment.

All slider bodies, rails and steel balls adopt fully quenched GCr15 bearing steel with ultra-precision mirror grinding raceway. Equipped with integrated anti-drop steel retainer, steel balls will not scatter when separating slider and rail. Features low friction, stable repeated positioning accuracy and long service life, widely used in CNC machine tools, automatic assembly lines, printing & packaging machinery, textile equipment and precision testing automation.

2. Technical Specifications

Model: HSR25R / HSR25R2UU / HSR25R1SS
Applicable linear rail width: 25mm
Overall block dimension: Height 36mm, Width 48mm, Length 70mm
Mounting hole layout: Top 4 threaded holes, hole spacing 35×35mm, M5 screw
Lubrication port specification: Front M6 grease nipple
Core structure: Four-row 45° circulating steel ball, compact R short block
Raw material: GCr15 bearing steel for block, rail and steel ball; nitrile rubber / composite metal for seal parts
Basic dynamic load Cr: 22.1kN; Basic static load C0r: 17.2kN
Standard clearance: CN normal clearance; C0 / C1 light preload customizable
Seal version difference:

• HSR25R: No outer seal, clean environment dedicated
• HSR25R2UU: Double UU rubber lip seal, general dustproof
• HSR25R1SS: SS composite metal double heavy seal, anti-cutting fluid & heavy dust

Working temperature range: -20℃ ~ 120℃
Single block net weight: 0.33kg
Max linear reciprocating speed: 1.4m/s
Complete installation dimension drawings, preload selection guide and long-cycle reciprocating fatigue test reports can be provided upon customer request.

3. Core Advantages

1. Four-way equal load 45° contact angle design, uniform bearing capacity in all installation directions, high overall rigidity, effectively offset small flatness deviation of mounting base and reduce assembly reject rate.
2. Three seal configurations optional to match different working conditions: open type for clean equipment, double rubber seal for ordinary workshops, composite metal heavy seal for machining dust & coolant environment.
3. All key components made of fully quenched GCr15 steel, high surface hardness and excellent wear resistance, maintain stable precision under long-term high-frequency reciprocating operation.
4. Mirror superfinished arc raceway + strictly classified high-precision steel balls, ultra-low friction coefficient, smooth silent sliding, lower equipment power consumption and less heat generation.
5. Integrated closed steel retainer, steel balls locked firmly inside circulation path, no ball falling when pulling slider out of rail, convenient disassembly, maintenance and part replacement.
6. Standard front M6 lubrication port, smooth internal grease circulation channel, extend refueling cycle and reduce daily maintenance workload.
7. Standard unified overall size and mounting hole position for all three models, fully interchangeable without modifying equipment mounting brackets or plates.
8. Full customizable service: C0/C1 preload grade, stainless steel anti-rust treatment, OEM laser marking on slider surface, neutral export carton anti-rust packaging.

4. Application Scenarios

HSR25R series four-way load linear guide block is core medium-load precision linear motion component for industrial automation equipment:

• Medium CNC engraving machine, milling machine, cutting equipment sliding axis support assemblies
• Automatic feeding, sorting, pick-and-place assembly line reciprocating positioning sliding units
• Large printing machinery paper feeding roller, tension control linear transmission structures
• Medium-heavy automatic packaging film unwinding, carton molding sliding bearing positions
• Automation testing equipment, medium-sized robot arm linear moving assemblies

Aftermarket fully interchangeable 25mm HSR series linear guide slider
Cost-effective multi-rigidity precision linear motion solution for CNC OEM, automation equipment factories, printing and packaging machinery bulk procurement.

5. Why Choose GQZ Bearing

25 years professional manufacturing experience for full HSR series four-way equal load linear guide blocks including HSR25R, HSR25R2UU and HSR25R1SS
HSR25R series sliders fully dimensionally interchangeable with international standard linear guides, consistent load rating, preload tolerance and installation benchmark parameters.
Complete OEM & ODM customization service supporting C0/C1 light preload upgrade, stainless steel anti-corrosion surface treatment and customized marking.
Full strict pre-delivery inspection procedures: GCr15 material hardness test, steel ball dimensional sorting screening, long-cycle reciprocating aging test, high-speed linear motion fatigue test.
Professional linear guide engineering team provides one-on-one preload selection, seal model matching and rail-slider matching installation technical guidance within 24 working hours.
Stable mass production lines with competitive direct factory bulk wholesale prices for long-term CNC equipment manufacturers, automation machinery suppliers and printing & packaging equipment factories.
We focus on four-way equal load circulating ball structure, multi-seal optional design, universal interchangeable compact slider layout and long-term win-win cooperation with global industrial automation linear transmission spare parts buyers.

6. Quality Control

Raw material chemical composition and hardness inspection of GCr15 bearing steel slider and linear rail blank
Precision forging, quenching & tempering, ultra-mirror finish grinding processing for slider inner arc raceway and rail rolling surface
Steel ball high-temperature quenching, superfinishing and automatic dimensional sorting screening production line
Integrated steel retainer stamping forming and automatic steel ball assembly process to evenly control internal circulation gap
Classified targeted performance testing: HSR25R series long-cycle medium-load reciprocating aging test, repeated forward-reverse sliding fatigue test, multi-direction combined load deformation detection
Full dimensional tolerance and surface defect recheck before anti-rust oil coating and export carton packaging shipment
Each batch of HSR25R series linear sliders passes full sampling reciprocating load test to guarantee stable long-term high-rigidity precision linear support performance inside CNC, automation, printing and packaging industrial equipment.

7. Get A Quote Now

If you need HSR25R open type, HSR25R2UU standard double seal and HSR25R1SS heavy dust-proof linear guide blocks for medium 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 preload grade selection, seal version matching and installation technical guidance from professional HSR series linear guide engineers
Customized linear motion performance scheme suggestions including C0/C1 preload upgrade options
Competitive direct factory bulk wholesale price for large quantity spare parts orders
Send your required purchase quantity, equipment load and on-site dust/oil mist environment to obtain detailed sealed formal quotation document.

8. FAQ

Q1: What are the differences between HSR25R, HSR25R2UU and HSR25R1SS?
A1: HSR25R is open type without outer seal for clean closed equipment; HSR25R2UU adopts double UU rubber lip seal for ordinary light dust workshops; HSR25R1SS uses composite metal double-layer reinforced seal, suitable for heavy dust and coolant splashing machining conditions.
Q2: Can three models replace each other directly?
A2: Yes, overall outer size, mounting hole spacing and load parameters are fully consistent, no modification to equipment installation structure required.
Q3: What equipment are HSR25R series sliders widely used for?
A3: Mainly matched with medium CNC sliding axes, automatic assembly line reciprocating sliding parts, large printing and packaging conveying equipment, automation precision testing instruments linear motion structures.