Mi 52 Gr 60
Overview
Product sourcing insights & recommendations
The phrase "mi 52 gr 60" refers to a high-precision heavy-duty needle roller bearing assembly produced by McGill (a brand of Regal Rexnord). The components consist of the MI 52 (inner ring/race) and the GR 60 (outer bearing assembly).
1. Product Specifications & Identification
The MI 52 is a precision-ground inner ring designed to be paired with the GR 60 Guiderol® needle roller bearing. This combination is typically used when a shaft cannot be hardened to the required HRC 58-62 MrosupplyBsc-Ind.
| Component | Technical Specification | |||
|---|---|---|---|---|
| MI 52 (Inner Ring) | Bore (ID): 3.2500" | OD: 3.7587" | Width: 2.0100" | Material: 52100 Chrome Steel Bsc-IndMotion |
| GR 60 (Outer Bearing) | Series: Guiderol® (Center-guided) | Features: Annular lubrication groove, available in sealed (GR 60 SS) versions MotionMonarchbearing | ||
| Pairing Compatibility | Also pairs with Cagerol® (MR 60) series bearings Motion |
2. Market Trends & Insights (2024–2026)
The market for these specific heavy-duty industrial components is shaped by broader trends in the needle roller bearing sector, which is projected to grow from $8.6B in 2025 to $13.8B by 2035 (CAGR ~4.8%) Sphericalinsights.
* Replacement Cycle Demand: A significant portion of the demand for MI 52 and GR 60 comes from the aftermarket. Fleet and machinery operators typically replace these precision components every 5–8 years to maintain machinery reliability Indexbox.
* Sector Growth: Demand is currently anchored by the Asia-Pacific region due to rising commercial vehicle and industrial equipment production IndexboxOpenpr.
* Technical Shift: There is a rising trend toward premium specialized compounds and validated OE parts to reduce warranty costs and improve fuel efficiency in heavy-duty machinery IndexboxIndexbox.
3. B2B Sourcing Availability
Current B2B listings indicate high availability for these components, primarily from specialized bearing suppliers.
* Pricing Range: B2B unit prices for MI 52 inner rings are approximately $12.88 for small batches, while complete heavy-duty assemblies can range from $9–$10 depending on the specific series (e.g., HJ series equivalents) AlibabaAlibaba.
* Supplier Hubs: Major sourcing hubs for compatible and OEM-equivalent bearings include Jinan, Shenzhen, and Nanjing in China AlibabaAlibabaAlibaba.
The file below provides a detailed list of compatible B2B products and suppliers for these specifications.
Here are the specifications and market insights for these components. You can continue with:
Needle Roller Bearing Inner Ring 3.25 Inch Bore Mi 52
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Sources & References
55 sources cited · Verified industry data & reports
MI 52 - Motion
www.motion.com
GR 60 · Country of Origin · Mexico · Compatible Bearing Type · Needle Roller Bearing · Closure Type · Open · Type Of Needle Bearing · Machined Race Needle Roller Bearing Inner Ring Only · Manufacturer Product Page · Click here · Manufacturer Catalog · Click here · CAD Drawing · Click here · Manufacturer Catalog Number · MI 52 · Precision ground inner ring Oil hole and annular lubrication groove For use with Cagerol® and Guiderol® bearings
McGill GR 52 RSS/MI 42 GUIDEROL machined-race radial needle roller ...
www.mrosupply.com
The inner ring provides a grooved surface for the needles to roll on. Use when the shaft cannot be hardened or when precision alignment is critical. Governed by ISO 1206:2023. Advantages: Easier installation; works on non-hardened shafts. Cost: Higher than drawn-cup designs. WITHOUT INNER RACE (Drawn Cup / Bushings): No separate inner ring—the shaft itself becomes the rolling surface. Requirement: The shaft must be hardened (case-hardened to Rc 60 minimum). L10 Life Definition (ISO 281) — L10 is the basic rating life at which 90% of a large group of identical bearings are statistically expected to survive under constant load and speed. It is calculated in millions of revolutions using the formula: L10 = (C/P)^p, where C is the basic dynamic load rating, P is the equivalent dynamic bearing load, and p is the life exponent (3 for ball bearings). Converting L10 to Operating Hours — To express L10 life in hours: L10h = (L10 × 10^6) / (60 × n), where n is rotational speed in RPM. Do you provide credit terms? Can I get a discounted price? I am a reseller / government entity. What is the return/warranty policy? Can it be shipped today? Does “Usually ships in 24 hours” mean it’s in stock? Read full FAQ ... Excellent product, price and service. RNA series bearings use the shaft journal directly as a raceway and require shaft hardness of 58–64 HRC, but they support higher speeds up to 52,000 rpm with oil, making them better for high-speed applications. Do full-complement bearings require special shaft preparation? NA series bearings mount on standard shafts without modification and work without shaft heat treatment. RNA series require shaft hardness of 58–64 HRC (case-hardened or hardened steel), and both benefit from proper lubrication—oil for speed, grease for low-speed/oscillating duty.
ASTM A572 Grade 50 Steel Equivalent, Gr 65, 60 Properties, Tensile ...
www.theworldmaterial.com
ASTM A572 grade 50 steel is a low-alloy high-strength structural steel with a yield strength of 50 ksi (345 MPa) and a tensile strength of 65 ksi (450 MPa). It has better mechanical properties than ASTM A36 steel. ASTM A572 contains 5 yield point grades: Grade 42, Grade 50, Grade 55, Grade 60 and Grade 65. Products cover structural steel shapes, plates, sheet piling, and bars. A572 GR 50 steel physical properties are given in the lists below: A572 material is widely used in engineering structures, construction steel structures, construction machinery, mining and mountain machinery, trucks, bridges, pressure vessels, etc., especially for construction and engineering machinery components that require good weldability and toughness. The following tables show ASTM A572 Grade 50 properties, as well as the specifications of Grade 65, Grade 60, etc. including chemical composition, mechanical properties and equivalent grade. The following datasheet gives the chemical composition in based on heat analysis. The table below lists ASTM A572 Grade 50 mechanical properties such as modulus of elasticity (Young’s modulus), shear modulus, ultimate tensile strength, yield strength, Brinell hardness, etc.
McGill® 0005200000 MI52 MGIL | BSC Industries
www.bsc-ind.com
The ring contains an oil hole and annular groove for relubrication of the bearing and can be used with both CAGEROL® and GUIDEROL® bearings or can be utilized as a bushing in plain bearing applications. McGill® Machined Separable Inner Ring, Standard, Series: MI Series, 3-1/4 in Inside Dia, 3.7587 in Outside Dia, 2.01 in Overall Width, For Use With: CAGEROL® MR 60 SS, S, RS, SRS, RSS Bearing, Round/Spherical Bore, Lubrication Hole Lubrication Hole, Chrome Steel McGill® 0005200000 MI Series Standard Machined Separable Inner Ring With Oil Hole and Annular Groove, 3-1/4 in ID x 3.7587 in OD, 2.01 in OAW, For Use With CAGEROL® MR 60 SS, S, RS, SRS, RSS Bearing, Chrome Steel
API 5L X52 Pipe Fittings API 5L X 52 Large Stock
www.api5lx.com
When authoring the standards, the technical committee recognized that there are two basic Product Specifications Levels (PSL) of technical requirements and therefore developed PSL 1 and PSL 2. PSL 1 is a standard quality for line pipe where PSL 2 contains additional chemical, mechanical properties, and testing requirements. Grades covered by this specification are A25, A, B and "X" Grades X42, X46, X52, X56, X60, X65, X70, and X80. The two digit number following the "X" indicates the Minimum Yield Strength (in 000's psi) of pipe produced to this grade. Grade X52 indicates 52000 PSI minimum yield strength and 66000 PSI minimum ultimate tensile strength.
API 5L Grade X60 Pipe Specification Chemical ...
www.octalsteel.com
U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch). ... a. Based upon product analysis. For seamless pipe with t > 20.0 mm (0.787 in), the CE limits shall be agreed. The CEIIW limits apply if C > 0.12 % and the CEPcm ... b. For each reduction of 0.01% below the specified maximum concentration for carbon, an increase of 0.05 % above the specified maximum for Mn is · permissible, up tp a maximum of 1.65% for grade ≥ L245 or B, but ≤ L360 or X52; up to a maximum of 1.75 % for grade > L360 or X52, but < L485 or X70; U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch). g Lower values of Rt0,5/Rm may be specified by agreement. h For grades > L625 or X90, Rp0,2 /Rm applies. Lower values of Rp0,2 /Rm may be specified by agreement. ... a. Based upon product analysis (see 9.2.4 and 9.2.5). U is the specified minimum tensile strength, expressed in megapascals (pounds per square inch). For more info please visit https://www.octalsteel.com/resources/api-5l-gr-x60-pipe a. For intermediate grades, the difference between the specified minimum tensile strength and minimum yield strength