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Precision Angular Contact Ball Bearings for Crankshaft and Shaft Support Projects

Product Details

Place of Origin: China

Brand Name: COL

Certification: IATF 16949:2016

Model Number: 726

Payment & Shipping Terms

Minimum Order Quantity: 1000

Price: as agreement

Packaging Details: single box

Delivery Time: 1-3 weeks

Payment Terms: T/T

Supply Ability: 800000pcs/month

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Product Details

Product Description

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                                    Precision Angular Contact Ball Bearings, Crankshaft Angular Contact Bearings, Shaft Support Angular Contact Bearings
                      

Precision Angular Contact Ball Bearings for Crankshaft and Shaft Support Projects

Our miniature angular contact ball bearings are purpose-built for crankshaft projects and precision shaft support where compact size, high rotational accuracy, and reliable combined load capacity are critical. These bearings support both radial and axial loads at defined contact angles, enabling smooth, backlash-free crank rotation and crank pin support.

We manufacture crankshaft support bearings with bore diameters from 6 mm to 9 mm, optimized for compact crank assemblies, precision engines, compressors, pumps, and miniature power transmission systems.

High Precision

Manufactured to tight tolerances for accurate crankshaft positioning and repeatability.

Multiple Contact Angles

Available in 15°, 25°, 30°, and 40° configurations for tailored axial/radial load balance.

Low Vibration

Smooth running characteristics ideal for high-speed crankshaft rotation.

Compact Design

Miniature form factor fits into narrow crank pin and shaft support assemblies.

726ACP5DF Compact Angular Contact Bearing for Crankshaft & Precision Shaft Support

The 726ACP5DF is a compact angular contact ball bearing designed specifically for crankshaft and precision shaft support. Its stacked, paired configuration delivers high rigidity, stable preload, and excellent rotational accuracy in a small footprint — ideal for handling the combined radial and axial loads generated by crank mechanisms.

Engineered for equipment requiring precise shaft location and minimal runout, the 726ACP5DF is widely used in crankshaft assemblies, crank pin supports, miniature compressors, pumps, and precision power transmission modules.

Key Advantages of 726ACP5DF for Crankshaft Projects

High Precision: P5 accuracy grade for demanding crankshaft alignment and repeatability.
Stable Preload: DF duplex arrangement maintains consistent preload under varying crank loads and speeds.
Low Vibration: Controlled internal geometry reduces noise and vibration in high-speed rotation.
Compact Design: Short axial length relative to load capacity, ideal for dense crankcase layouts.

Crankshaft Support Bearing Specifications

The following table lists standard miniature angular contact ball bearing models suitable for crankshaft projects and precision shaft support. Custom sizes, materials, and contact angles are available on request.

Bearing Number	Inner Dia. d (mm)	Outer Dia. D (mm)	Width B (mm)	Chamfer rmin	Dynamic Cr (N)	Static Cor (N)	Speed (Grease) (rpm)	Speed (Oil) (rpm)
718/6 C/AC/A	6	13	3.5	0.15	720	310	102000	152000
719/6 C/AC/A	6	15	5	0.2	1340	560	132000	132000
719/6-16 C/AC/A	6	16	5	0.2	1390	580	88000	132000
706 CZZ HQ1	6	17	6	0.3	2350	960	120000	145000
706 C/AC/A	6	17	6	0.3	2250	930	82000	123000
726 C/AC/A	6	19	6	0.3	2300	960	77000	116000
718/7 C/AC/A	7	14	3.5	0.15	750	360	92000	138000
719/7 C/AC/A	7	17	5	0.3	1500	680	80000	121000
707 C/AC/A	7	19	6	0.3	2360	1000	80000	120000
707 ACV	7	19	6	0.3	3000	1400	75000	110000
727 C/AC/A	7	22	7	0.3	3440	1510	64000	96000
718/8 C/AC/A	8	16	4	0.2	1310	660	80000	121000
719/8 C/AC/A	8	19	6	0.3	2550	1150	73000	110000
708 C/AC/A	8	22	7	0.3	3510	1540	67000	100000
708 C/AC/A -2RZ	8	22	7	0.3	3510	1540	67000	100000
728 C/AC/A	8	24	8	0.3	4010	1930	60000	90000
718/9 C/AC/A	9	17	4	0.2	1360	740	74000	111000
719/9 C/AC/A	9	20	6	0.3	2560	1180	68000	102000
709 C/AC/A	9	24	7	0.3	3920	1920	56000	84000
729 C/AC/A	9	26	8	0.3	5140	2410	54000	81000

Note: C = 15°, AC = 25°, A = 30°, B = 40° contact angle. Series is continuously expanded based on customer requirements. Non-contact seals available on selected models.

Applications

Crankshaft Assemblies

Main journal and crank pin support in engines, compressors, and pumps requiring high combined load capacity.

Miniature Engines

Compact crank mechanisms in small-displacement engines, model engines, and micro power units.

Precision Shaft Support

Spindle and shaft support in compact precision equipment such as the 726ACP5DF bearing configuration.

Compressors & Pumps

Crank-driven fluid handling equipment requiring smooth, reliable rotation under varying loads.

Power Transmission

Rotary support in small motors, gearboxes, and crank-link mechanisms.

Precision Machinery

High-repeatability rotation in test fixtures, inspection equipment, and R&D crank prototypes.

Why Choose Our Miniature Angular Contact Bearings?

Specialized crankshaft focus: Bearings designed and tested for crankshaft, crank pin, and precision shaft support applications.
Flexible configuration: Single, paired (DB/DF/DT), and custom preload arrangements available.
Material options: Standard bearing steel, stainless steel, and ceramic hybrid configurations on request.
Quality control: Dimensional, noise, and vibration inspection to ensure consistent performance.
Fast prototyping: Small-batch samples and custom dimensions supported for R&D projects.
Direct factory pricing: Competitive pricing from manufacturer to global buyers.

Frequently Asked Questions

What are miniature angular contact ball bearings used for in crankshaft projects?

Miniature angular contact ball bearings are used in crankshaft assemblies to support the main journals and crank pins, enabling smooth rotation, precise positioning, high combined load capacity (radial and axial), and compact design in limited installation spaces.

What is a 726ACP5DF compact angular contact bearing?

The 726ACP5DF is a compact angular contact ball bearing designed for precision shaft support, including crankshaft and crank pin support. It offers high precision, stable preload, low vibration, and a compact stacked design suitable for space-constrained precision equipment.

Can I get custom contact angles for angular contact bearings?

Yes. We supply miniature angular contact ball bearings with contact angles of 15° (C), 25° (AC), 30° (A), and 40° (B), and can customize configurations based on your crankshaft or precision machinery requirements.

Do you provide samples and custom bearing sizes?

Yes. We support sample orders, small-batch production, and fully custom dimensions, materials, and contact angles for OEM and R&D projects.

Request a Quote for Miniature Angular Contact Bearings

Send us your specifications, target quantities, and crankshaft application details. Our engineering team will recommend the right bearing model — from standard crankshaft support bearings to custom 726ACP5DF precision shaft support assemblies.

Get a Free Quote

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705AC Miniature Super Precision Angular Contact Ball Bearing 5x14x5mm with 25°,15° and 40° Contact Angle and Light Preload

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