Adapter Sleeves
Product Overview
Adapter sleeves are the most common components used for locating bearings with a tapered bore onto cylindrical shaft seats. They enable positive positioning on plain shafts without requiring shoulders or stop rings, accommodating standard commercial shaft tolerances (h9 to h11). Each assembly comprises a slotted sleeve, a matched locknut, and a locking device (lock washer or locking clip).
Product Range
H2 Series Adapter Sleeves
Light-duty series optimized for compact arrangements under normal radial loads; standard 1:12 outer taper.
H3 Series Adapter Sleeves
Standard industrial series conforming to DIN 5415, balancing section thickness and clamping force for general shaft mounting.
H23 Series Adapter Sleeves
Wide-design series built for heavier series bearings (such as 23 and 22 series), providing wider axial contact and secure seating under fluctuating loads.
H30 Series Adapter Sleeves
Thin-walled, large-diameter series designed for restricted space configurations in heavy machinery, gearboxes, and multi-row bearing setups.
H31 Series Adapter Sleeves
Extended heavy-duty series for large shaft diameters subjected to intense shock loads and vibration.
H32 Series Adapter Sleeves
Extra heavy-duty series engineered for maximum section modulus and high clamping integrity in heavy industrial equipment.
Material Composition: Precision-turned from carbon steel stock (minimum tensile strength >= 430 N/mm2) ensuring adequate elasticity during expansion and high thread shear resistance.
Taper Geometry: External surface machined to a strict 1:12 taper ratio (+/- tolerance limits conforming to ISO standards) to ensure uniform radial expansion against bearing inner rings.
Slot Configuration: Single longitudinal axial slot engineered to distribute clamping force evenly around the shaft circumference without localized stress concentration.
Thread Precision: Threads machined to ISO metric tolerance class 6H using precision thread-rolling or single-point turning to prevent galling during locknut tightening.
Surface Protection: Anti-corrosion industrial oil coating applied post-machining; phosphate or black oxide finishes available upon request.
Key Specifications
|
Series Designation |
Taper Ratio |
Shaft Diameter Range (d1) |
Standard Reference |
Associated Bearing Types |
|
H2 |
1:12 |
10 mm – 135 mm |
DIN 5415 / ISO 113-1 |
12xxK, 22xxK, 202xxK |
|
H3 |
1:12 |
10 mm – 135 mm |
DIN 5415 / ISO 113-1 |
13xxK, 203xxK, 222xxK |
|
H23 |
1:12 |
20 mm – 180 mm |
DIN 5415 / ISO 113-1 |
23xxK, 223xxK |
|
H30 |
1:12 |
100 mm – 400+ mm |
DIN 5415 / ISO 113-1 |
230xxK, 240xxK |
|
H31 |
1:12 |
100 mm – 340+ mm |
DIN 5415 / ISO 113-1 |
231xxK, 241xxK |
|
H32 |
1:12 |
100 mm – 300+ mm |
DIN 5415 / ISO 113-1 |
232xxK |
Match Bearing Bore Type: Verify that the target bearing features a tapered bore (suffix K, taper 1:12).
Determine Shaft Diameter (d1): Measure the exact nominal shaft diameter in millimeters (or inches for HE series) where the sleeve will seat. Do not assume standard motor shaft sizes without micrometer verification.
Select Series by Space and Load:
Use H2/H3 for standard commercial drives and general machinery.
Choose H23 for wider bearings handling combined loads.
Specify H30/H31/H32 for large-bore heavy industrial applications where radial cross-section height must be minimized.
Verify Component Completeness: Ensure the part number includes the matching locknut (KM/KMT series) and locking clip/washer (MB/MS series).
Applications
Industrial Gearboxes
Securing self-aligning ball bearings and spherical roller bearings on intermediate and output shafts under continuous torque.
01
Belt Conveyor Pulleys
Mounting heavy-duty bearings on long roller shafts without requiring precise shaft shoulders.
02
Mining & Crushing Equipment
Withstanding high shock loads and reversing forces in jaw crushers and vibrating screens.
03
Fans and Blowers
Locating rotor support bearings on industrial ventilation shafts prone to thermal expansion.
04
Paper & Textile Machinery
Delivering precise axial location across multi-roll processing lines without shaft marring.
05
Mounting & Installation Considerations
Shaft Preparation
Clean the shaft seating area thoroughly. Ensure surface finish is within Ra 1.6 um and dimensional tolerance meets ISO h9 to h11.
Drive-Up Method
Clean and lightly oil the sleeve taper and bearing bore. Drive the bearing up the tapered sleeve using a spanner wrench or hydraulic nut, measuring the precise reduction in internal radial clearance (using feeler gauges) to prevent over-expansion.
Locknut Tightening
Torque the locknut to the recommended seating angle or tightening torque. Never reuse deformed locking washers or damaged locknut threads.
Inspection & Quality Control
Dimensional Audit
100% verification of inner bore diameter (d1), thread pitch diameter, sleeve length (L), and wall thickness using calibrated air gauges and thread micrometer standards.
Taper Angle Check
Optical profile projector inspection of the 1:12 outer taper to ensure uniform contact patterns across the entire sleeve width.
Material Testing
Spectrometric analysis for raw steel chemical composition (C, Si, Mn, P, S) and Rockwell hardness testing (HRC / HB) verifying tensile compliance.
Thread Functional Gauge Test
Go/No-Go thread ring gauges applied to every locknut and sleeve thread to guarantee interference-free assembly.
Supply & Customization Options
Packaging Formats
Bulk industrial anti-rust paper wrapping, individual carton boxing, or customized palletized export crating.
Dimensional Modifications
Non-standard metric sizes, specialized thread pitches, or custom sleeve lengths (L) machined to customer drawings.
Surface Treatments
Alternative protective coatings including zinc plating, black oxide, or phosphating for corrosive environments.
Logistics Support
Flexible minimum order quantities (MOQ), scheduled blanket orders, and direct drop-shipping to global OEM assembly plants.
To accelerate quotation and technical validation, please provide:
Complete Part Number or Dimensions
Exact sleeve designation (e.g., H310) or internal shaft diameter (d1) and bearing series.
Order Volume
Annual consumption quantity, batch sizes, and required delivery schedules.
Accessory Requirements
Specify whether locknuts (KM) and locking devices (MB) must be included as a set.
Material or Finish Requirements
Standard carbon steel or specific anti-corrosion surface treatments.
Destination Port / Incoterms
Target delivery location for freight and logistics calculation.
FAQ
Q: Can adapter sleeves be reused during bearing replacement?
A: Lock nuts and locking tabs must always be replaced. Adapter sleeves may be reused only if clean, unscarred, dimensionally within tolerance, and free from thread galling or taper fretting.
Q: What is the difference between an adapter sleeve and a withdrawal sleeve?
A: Adapter sleeves have a 1:12 outer taper and are driven onto the shaft to mount tapered-bore bearings. Withdrawal sleeves have a tapered outer surface matching the bearing bore but feature an external thread facing the bearing removal side for hydraulic or mechanical extraction.
Q: How do I verify correct internal clearance reduction during mounting?
A: Measure the bearing's initial radial internal clearance using feeler gauges before mounting. As the bearing is driven up the tapered sleeve, monitor clearance reduction until it matches specified installation limits.
Q: Are locknuts and locking washers included with the sleeve?
A: Standard industrial supply includes the matching locknut and locking device (such as an MB lock washer or MS locking clip) packaged as a complete assembly set.
Q: What shaft tolerance is required for mounting adapter sleeves?
A: ISO h9 to h11 tolerance classes for metric shafts are recommended to ensure secure friction grip without inducing excessive shaft constriction.
Q: Do you supply inch-dimensioned adapter sleeves (HE series)?
A: Yes, both metric (H series) and inch-dimensioned (HE series) adapter sleeves matching standard shaft dimensions are available upon request.
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