STAG Group | SpecTech UK

Nadella Aerospace Bearings

admin — Mon, 21 Feb 2011 19:52:28 +0000

Nadella (now part of the Koyo/Torrington Group) has been a specialist manufacturer of needle roller bearings since the 1930s and has gone on to produce some unique solutions using the needle roller format. Based in France with a workforce of 870, Nadella has a global turnover in excess of €60m.

The Nadella product was available via the Timken name (through their purchase of Torrington who owned Nadella at the time).

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Sarma Aerospace Bearings

admin — Mon, 21 Feb 2011 19:21:54 +0000

The Sarma company is part of SKF Aerospace, one of Europe’s primary aerospace bearing manufacturers for civil and military requirements. Since 1975 Sarma has been part of SKF and also own a subsidiary aerospace bearing manufacturer by the name of Ampep. Sarma’s aerospace product range is split over three areas:

struts and rods for flight control systems (both metallic and composite constructions)
ball, roller and spherical plain bearings
linear and rotary actuators and force transducers.

Sarma has extensive research and development facilities offering maximum performance with minimum weight. Their involvement has stretched to virtually all primary aerospace construction programs worldwide including Boeing 777 production, the entire Airbus family of aircraft, many Eurocopter aircraft, Fokker, Embraer, Dassalt and many other high profile and demanding projects.

Sarma has kept at the forefront of customer requirements by implementing many new features including EDI (Electronic Data Interchange) and advanced bar coding solutions. Sarma is committed to continual improvement of its products and services for new projects and the support of existing flight platforms.

We are always happy to help. If you have a query, please contact us

Ampep Bearings

admin — Fri, 18 Feb 2011 06:28:52 +0000

Ampep (now a subsidiary of Sarma, part of the SKF Aerospace Group) was established in 1963 and is one of the world’s leading manufacturers of precision plain bearing products (spherical misaligning bearings and bushings).

Located in south-west England, the Ampep facility produces aerospace bearings for some of the most demanding applications. Its inhouse expertise in the aerospace field has produced huge successes in other markets such as motor sport, mass transit (rail), fighting vehicles and various marine systems.

The Ampep brand has been at many world firsts and was selected for its performance benefits over competing products. Significant investments has been made over the years into research and development, maintain its edge thus giving clients bearings which can provide longer maintenance cycles and less airframe down time. The Ampep facility offers an experienced and extensive design service which often solves difficult and demanding applications.

The Ampep brand is closely linked to the design and development in spherical bearings for helicopter applications, particularly main rotor blade and tail rotor blade control. The Ampep XLNT system is testament to the continuing customer focus and R & D commitment. The Ampep XLNT system comprises a ceramic-coated self-lubricating spherical plain bearing, which provides significant extended life characteristics. This system lends itself particularly well to helicopter rotor head control where loads are high and the frequency of oscillation is rapid. Wear under these conditions using standard products is a burden most manufacturers and end users have to endure. XLNT can lesson the burden by increasing life performance.

The ceramic coating and liner combination meets the requirements of paragraph 3.17.4.5 of SAE AS81819. Current helicopter applications include:

August A109 - AB139 – A129
Eurocopter EC225
NH Industries NH90
GKN Westland Lynx

Other types and standards that the Ampep range has covered include:

AGS3808 – AGS3809 – AGS3810 – AGS3811 – AGS3812 – AGS3813 – AGS3814 – AGS3815

ASNA2121 – ASNA2122 – ASNA2123 – ASNA2124 – ASNA2125 – ASNA2126 – ASNA2127 – ASNA2128

BAS7651 – BAS7652 – BAS7653 – BAS7654 – BAS7661 – BAS7662 – BAS7663 – BAS7664 – BAS7668 – BAS7671 – BAS7672

EN2755- EN2285 – EN2286 – EN2287 – EN2288 – EN2584 – EN2022 – EN2585 – EN3048 – EN2023

MS14101 – MS14102 – MS14103 – MS14104

MS21230 – MS21231 – MS21232 – MS21233

M81934/1 – M81934/2, – M81935/1, – M81935/4, – M81935/2 – M81935/5

NSA8134 – NSA8135 – NSA8136 – NSA8137 – NSA8143 – NSA8145 – NSA8146 – NSA8147 – NSA8148 – NSA8149

PAN4830 – PAN4831 – PAN4832 – PAN4833 – PAN4834 – PAN4835 – PAN4843

We are always happy to help. If you have a query, please contact us

Miniature Instrument Bearings

admin — Wed, 16 Feb 2011 14:14:03 +0000

The miniature and instrument bearing normally takes the form of a small deep groove or angular contact ball bearing with a bore well below 10mm or 1/2″. Instrument bearings are probably the world’s most mass-produced precision product and consequently great care is taken during their manufacture to ensure high quality and consistency in performance. Bearing assembly is normally performed by highly trained staff in very clean and controlled conditions to ensure contamination does not become an issue.

Ironically, miniature bearings carry the largest reference sizes as the following features are normally specified within a miniature bearing reference number:

bearing ring or ball material
bearing size
shielding or sealing options
bore or OD grading to assure tight matching and close running characteristics
starting and running torque values
cage or retainer type including material
precision grade (ABEC 5, 7, 9 etc)
radial clearance
lubrication type (and sometimes quantity)
pairing options (if made as a duplex pair).

Typical miniature aerospace bearing manufacturers include NHBB, NMB, RMB, GRW, WIB, Barden and Timken (MPB). All of these manufacturers have their own means of identifying bearing sizes and their particular features but most of them follow a general pattern that can quickly be identified.

Miniature and instrument bearings usually have exacting tolerance, radial clearance and lubrication requirements. These requirements should never be deviated from as even the smallest changes in bearing specification can yield differing results with instrumentation.

Specialist Technologies has a vast range of interchanges against many OE miniature-bearing references including interchanges against

Bendix/Eclipse-Pioneer
Clifton
Collins
Hamilton Standard
Hamilton Sunstrand
Honeywell
Kollsman
Kearfott
AirSearch
Smiths
Sperry (including Sperry Gyro and Sperry flight systems)
Whittaker
Westinghouse
Woodward Governor

We are always happy to help. If you have a query, please

MPB/Timken Aerospace Bearings

admin — Wed, 16 Feb 2011 11:12:47 +0000

In 1990 Timken took over the Miniature Precision Bearing (MPB) facility and has continued to grow and support the plant’s involvement in the aerospace, medical and positioning systems markets.

Recognised as a leading manufacturer in precision bearings, Timken’s continued success has allowed their product range to grow and provide customers with many advances in materials and design technology.

Radial Contact Bearings (Deep Groove Bearings)

Timken Super Precision (MPB) Radial Contact Bearings are available both in inch and metric sizes.
All the miniature bearing range is manufactured to a default tolerance of ABEC 7.
The standard radial play is 0.0002 to 0.0008″ and other radial play ranges are available upon request.
Shields, seals, OD flanges, and extended inner rings are also available within the standard specification range.
Bearings will be lubed by default with a protective coating conforming to MIL-PRF-6085. Other bearing lubrications (oils and greases) are also available from the Timken MPB range.
Bearings will be packaged either individually in pill pack strips or in a vial pack.

Angular Contact Bearings

Timken Super Precision (MPB) Angular Contact Bearings are available in both inch and metric sizes.
All bearings are manufactured to ABEC 7 tolerances. Other tolerances are available upon request.
Bearings are manufactured and assembled to provide a nominal contact angle with ±3º of the specification being assembled to.
Bearings will be lubricated with a vacuum impregnation of the phenolic retainer to MIL-PRF-6085. Other lubricants options are also available.

Thin Section & Torque Tube Bearings

Radial Contact Bearings (Deep Groove Bearings)

Timken Super Precision (MPB) Thin Section and torque tube Bearings are available up to a maximum size of 6.5 inch OD.
The ball grooves are honed for precision, low torque, and quiet operation.
The deep groove construction allows for handling of radial, thrust or combination loads.
While offered primarily with 440C stainless steel rings and balls with a one-piece fully machined snap-in phenolic cages, other material and separator options are available for specific application requirements.

Angular Contact Bearings

Timken Super Precision (MPB) Thin Section and torque tube angular contact Bearings have been developed to offer maximum ball complement with a one-piece precision-machined retainer and are available in sizes up to a maximum size of 6.5 inch OD.
The ball grooves are honed for precision, low torque, and quiet operation.
The increased ball complement, combined with a relatively high contact angle, maximizes axial stiffness.
Rings and balls are normally 440C stainless steel, but other material options are available for specific applications.

Fractured Race Bearings

Timken Super Precision (MPB) fractured Race Bearings have outer races that are radially fractured in one location. This permits the race to be opened for complete flexibility in the choice of ball complement and separator in a deep groove radial bearing.
High strength, stainless steel holding bands are then pressed on the ground shoulders to retain tight abutment and perfect alignment of the fractured surface during handling and normal operation. Years of experience have proven that in most applications, the bearing functions as if it had never been fractured.
Fractured race bearings are available in both full ball complement and retainer configurations.

Advanced Bearings

From aircraft and missile guidance systems to computer disc drives and rotary encoder applications, Timken Super Precision (MPB) is leading the way in technology with its super-precision, miniature, instrument, and thin section bearings.

Timken Super Precision (MPB) bearings can also be found in jet and turbofan engines, satellites, X-ray equipment and other high technology applications. They have the capability to produce many standard or advanced designs in ball bearing format. The design and manufacture of custom integral assemblies and precision components to specific applications are also a growing specialty. As an ISO 9001 certified company, Timken is positioned to provide customers worldwide with quality products for a wide range of applications.

Timken Super Precision (MPB) has emerged as an industry leader in applying unique solutions to engineering challenges. We have well over 60 years of experience in building precision bearings for a variety of applications from guidance to instrumentation, to medical and dental, and a variety of industrial uses.

We are always happy to help. If you have a query, please

Koyo/Torrington Aerospace Bearings

admin — Tue, 15 Feb 2011 16:14:41 +0000

The relatively recent acquisition of the Torrington/Nadella needle bearing business from Timken by the Koyo/Jtekt Group has significantly strengthened Koyo’s position as a dominant force in needle bearing production and supply worldwide. The addition of the old Torrington and Nadella inch and metric needle bearings provides a significant broadening of its product offering. Koyo has retained the same European and US manufacturing facilities, therefore continuity of supply and quality of product is assured.

Koyo/Torrington aerospace needle product is usually run as special batch traceable run and is segregated in order to prevent mixed batches and maintain traceability. With customer QA requirements increasing what was a standard needle roller product used in many industrial applications is now treated as a full aerospace item where aerospace requirements apply.

Specialist Technologies has extensive experience in dealing with these items and will supply you the with correct products to your current aerospace QA requirements.

We are always happy to help. If you have a query, please

RWG Frankenjura Aerospace Bearings

admin — Tue, 15 Feb 2011 14:15:34 +0000

RWG Frankenjura is one of Europe’s largest producers of plain shaft and rolling element bearings for the aerospace, autosport and high end industry markets. RWG is a primary supplier of bearings to many civil and military groups such as Eurocopter, Airbus, BAe and many others. Born from the FJG Bearing company, RWG Frankenjura now enjoy new ownership from the KAMAN in 2002.

RWG Frankenjura produce a wide range of metric and inch sized single, double row, barrel roller and self-aligning ball bearings for all airframe applications. Typical types include the DSRP, KP and KPA types. They also produce precision cylindrical rollers for turbine requirements along with plain rod ends for tie rods and links.

RWG also cover metric and inch-sized plain spherical bearings and plain journal bearings. RWG’s plain bearing offering covers many standard and special designs to customer drawing.

If you have requirements for RWG product then please do not hesitate to

RBC Aerospace Bearings

admin — Tue, 15 Feb 2011 14:07:18 +0000

The RBC Bearing Group has one of the widest aerospace bearing offerings in the world. From small plain bushings to large thin section bearings, RBC provides a very diverse range of aerospace bearing products. With expertise gathered from many years of supplying most of the world’s leading civil and defense aerospace contractors, RBC holds a privileged position in the aerospace market.

RBC’s primary aerospace facilities include the following production plants across the USA:

RBC Industrial Techtonics – Precision ball and roller bearing units
RBC Heim – Bushings
RBC Transport Dynamics – Lined spherical plain bearings
AID – Tie rods
Allpower – Bushings/Journals and engineering products.

RBC’s aerospace product range includes:

Airframe control bearings
Ball bearing rod ends
Needle track roller bearings
Stud type track roller bearings
Thin section bearings
Radial ball bearings
Gearbox and engine ball and roller bearings
Spherical plain bearings
Rod end plain bearings
Journal bearings (Bushings)
Links and assemblies
Swage tubes and control rods
Machined components.

SNFA Bearings

admin — Tue, 15 Feb 2011 14:00:48 +0000

SNFA has a long-standing reputation as a specialist in high-precision angular contact ball bearings.

SNFA is now part of the SKF group, and the combined experience of both companies has produced a new series of leading-edge super-precision bearings. SKF-SNFA’s ready-to-mount, sealed super-precision angular contact ball bearings have a compact cross section and are characterised by high-speed, high-stiffness, low heat generation and extended bearing service life. In addition, the sealed and pre-greased features virtually eliminate premature bearing failures due to contamination. The angular contact thrust ball bearings for screw drives are available in single direction, double direction, cartridge units with flanged housing, or to tailored designs.

We are always happy to help. If you have a query, please

Landing Wheel Bearings – Timken

admin — Tue, 15 Feb 2011 12:44:57 +0000

Over 500 tonnes hit the runway at over 175mph and the load has to be transmitted from the aircraft through to the tyres via the taper roller bearings. In a fraction of a second they rotate from zero to landing speed after having endured sub-zero conditions for several hours at 35,000ft and are then rapidly heated via the multi-disc braking system built into the wheel hub. The loads, acceleration and conditions are terrific. No other application in the world combines these conditions of spike loading and extreme environment in such a short time frame.

Timken dominates the landing wheel market and for good reason. With years of experience in this specialised field they have carefully built up extensive experience in the forces and environments under which landing wheel bearings are subjected. All landing wheel bearings are subjected to Timken’s 629 inspection code which has been developed alongside all the world’s leading aircraft wheel and brake manufacturers. All Timken aircraft taper roller bearings are marked with wither 20629 for inch-sized products or N0629 for metric sized products.

Timken supply most of the world’s private, commercial and military wheel bearings for nose and main landing gear wheels.

Specialist Technologies can help you with your military requirements on Timken tapers.