Utilizing our precision processing technology and know-how of bearing assembly, we have achieved high precision and high quality, and our products are adopted in various industries.
Application examples
Automotive industry
Application: Truck tire pressure control parts
Other examples in the automotive industry: Turbocharger shaft, high pressure fuel pump piston pin, automatic sliding door etc.
Medical industry
Application: Peristaltic pump for analyzer
Other examples in the medical industry: Blood pump, surgical robot, etc.
Consumer electronics industry
Application: Parts for food mixer
Other examples in the consumer electronics industry: Vacuum cleaner, hair dryer, microwave, etc.
Industrial machinery industry
Application: Tire wire drawing machine
Other examples in the Industrial machinery industry: Textile machine, fan motor, marking device, chip mounter, etc.
Storage industry
Application: Pivot of a magnetic head actuator for HDD (We manufacture 80% of the global share)
Other examples in industries not listed here: Timing pulley, mail sorting machine, encoder, automatic ticket gate, surveillance cameras, money machine etc.
Storage industry
Application: Tape guide part for tape drive
Other examples in industries not listed here:
Timing pulley, mail sorting machine, encoder, automatic ticket gate, surveillance cameras, money machine etc.
FEATURES & APPLICATIONS
Precision Mechanical Assemblies (PMAs) are a wide range of subunit products that incorporate high-precision MinebeaMitsumi ball bearings. PMAs provide both high precision and high product quality by making maximum use of super-precision machining technology and specialized knowledge in bearing assemblies accumulated through in-house ball bearing development and production.
In addition, we can reduce the total cost by providing all the components in-house.
Reduction of assembly time
PMA with built-in bearings provides a solution to minimize your man-hours.
Reduction of inspection time
PMA can reduce inspection man-hours through dedication to quality assurance.
Eliminate assembly defects
PMA results in zero defects in the bearing assembly for the customer.
Reduction of overhead
PMA is made from multiple assembled parts which provides hidden cost savings such as ordering, inventory management, and delivery date management.
Application use
| Automotive | Medical | Home appliances | Industrial machinery | Storage | |
|---|---|---|---|---|---|
| Sub-unit | ○ | ○ | ○ | ○ | ○ |
| Ultra precision part | ○ | ○ |
* Ultra-precision part is an individual product (without bearing assembly, etc.)
Material
- Stainless Steal
- : SUS3xx, SUS4xx, SUS6xx, etc.
- Steal
- : SUJ2, SUMxx, SCMxx, etc.
- Aluminum
- : A2xxx, A5xxx, A6xxx, etc.
- Brass
- : C3604, C6801, etc.
- Surface finish
- : Electroless nickel plated, alumite, zirconia, Isonite nitride
note: Other materials may also be available for consideration, so please contact us.
Ability to respond
Size
Outer diameter : Max 50 mm (Experienced up to 260 mm)
Length : Max 440 mm
Machining Process
Cutting
Grinding
Milling processes, etc
Special process
We have heat treatment equipment.
PMA usage cases
1. RUNOUT ACCURACY STABILIZATION
Run out defect failures (NG) were occurring during customers' in-house part machining and assembly due to part accuracy dimensions at their factories. MinebeaMitsumi responded by boosting precision and changing to the correct parts tolerance during assembly, which resulted in improving runouts and rattles, etc.
2. PREVENTING COTTON FIBERS
MinebeaMitsumi succeeded in preventing cotton fibers to get into the bearing by using a custom outer seal on the bearing and also mounting a resin piece onto the bearing outer edges.
(Customer specs were to clamp the stainless steel shield with a stop ring. MinebeaMitsumi design uses the adhesive type.)
3. PRODUCT MARKING
MinebeaMitsumi succeeded in laser marking of part edges for product logo printing to meet market needs for anti-copy protection.
4. IDEAL BEARING SELECTION
MinebeaMitsumi extends product service life by allowing customers to select bearing specifications that match actual usage conditions. This drastically reduces the frequency of replacement of bearing sets.
5. PRELOAD MANAGEMENT
MinebeaMitsumi made the following improvements in preload management compared to when this was performed in-house by the customer
- *Lowers number of service periods at customer plant (because MinebeaMitsumi performs preloading.)
- *Reduces part quantity (MinebeaMitsumi selects optimal preloading technique).
6. ENHANCED DETECTION ACCURACY
Customers who use bearings as a separate unit requested us to boost their sensor detection accuracy. We proposed the use of preloaded bearing assemblies. By doing this, we achieved better runout, less rattle, and boosted the detection accuracy.
7. BEARING INTERMESH
Customers who mounted MinebeaMitsumi bearings onto a shaft made by other company found wearing of the shaft caused by slippage on the inner race. We successfully eliminated this wear by setting an ideal mesh tolerance.
8. PLATING
We proposed our customers using hard chrome plating to switch over to electroless nickel plating. This helped drastically to cut costs while maintaining the required surface hardness. These plated products had extremely strict runout accuracy, however, our processing technology succeeded in improving the runout accuracy to an even higher level.
9. FEWER PARTS REQUIRED
MinebeaMitsumi succeeded in boosting the bearing strength by preloading the bearing. Consequently, parts to prevent arm drift are no longer necessary and we realized a cost advantage as for the product total.
FAQ
-
[PMA] Is it possible to handle a small amount of sample?
It is possible. For more details, please contact us.
We will respond according to the customer's request. -
[PMA] What is the biggest size you can handle?
As a guide, we can handle the maximum length of approx. 440 mm and the maximum outer diameter of approx. 260 mm.
For more details, please contact us. -
[PMA] How long is the sample lead time?
Generally, it will take about 6 weeks, but it will change depending on the processing / assembly man-hours and the situation, so we will adjust the lead time according to the customer's request after consultation.
-
[PMA] For PMA, what kind of method is possible for joining bearings and parts (shafts, housings, etc.).
Bonding, press-fitting, press-fitting adhesion, caulking, etc. are available.
We can also propose appropriate joining conditions according to the customer's request (design / specifications), so please contact us.
