SPECIALISTS IN CUSTOM-MADE PRODUCTSIndividual items or large batches – Raeder Vogel is one of the market leaders in custom-made products. Forty employees in their construction and development department strive to make your wishes a reality every day. The range of services includes the entire production development cycle – from the initial idea to construction, testing and production. Depending on the requirements and area of application, They can either adapt existing products to your needs or they can design especially tailored solutions. INNOVATIVE WHEEL TREAD MATERIALSRaeder Vogel constantly work on further developing their existing product range. This, of course, includes considering market requirements and implementing them in new products. In the development of wheel tread materials, they are the leading company in the world. They work in line with the latest scientific developments and collaborate closely with various colleges and partners. Over the past decades, they have developed and patented several materials, such as PEVODYN®, VULKOLLAN®-ELF and TRACTOTHAN®

We provide re-manufacturing and service exchange of viscous vibration dampers from Hasse &amp; Wrede, STE, Holset, Simpson, Metaldyne and WSK.Description and Application hints for Viscous Torsional Vibration Dampers Introduction Torsional
vibrations in piston-engine crankshafts are generated by the crank throws,
which convert linear reciprocating piston movement into rotational movement.
The vibration amplitudes superimposed on uniform rotation of the shaft can
reach levels, both in the zones of resonance and on their flanks, which ge­nerate
unacceptable stresses or at the very least undesirable noise.The viscous
damper has proved successful for many years in reducing crankshaft loads. It
operates independently of the en­gine's lubricating-oil circuit and needs no
maintenance or ad­justment throughout its working life. Construction The damper
consists of a totally-enclosed housing (1) with cover (2) and the inertia ring
(3). The inertia ring (3) is located radially and axially in the housing by the
plain bearings (4), which also ensure the necessary internal clearance. Gaps
(5) between the housing and the ring are filled with a high-viscosity silicone
fluid. Two extraction plugs (6) provide the opportunity of testing the silicone
fluid without having to dismantle the damper. Function The viscous
damper provides the necessary torsional vibration damping effect by resilient,
damped coupling of the secondary to the primary mass. If the crankshaft rotates
uniformly without torsional vibration the inertia ring in the housing is driven
round without any slippage occurring. However, as soon as even slight
superimposed vibration amplitudes occur, relative move­ment takes place between
the housing (primary mass) and the ring (secondary mass). This generates
alternating shear stres­ses in the silicone film. The sum of these stresses
over the entire gap surface results in a "damping" moment. The damper
is operative throughout the engine's speed range and takes ef­fect at all
orders of harmonics.The vibration
energy generated by the combustion and inertial forces acting on the crankshaft
is converted by the damper into an equivalent quantity of heat. This heat is
dissipated by the surface of the housing. If the cooling effect thus obtained
is in­adequate, additional oil or air cooling has to be provided.The working
temperature of the damper should not exceed 95°C. It is permissible to run the
damper at higher temperatures but this may lead to a reduced life time. Silicone
fluid A characteristic
feature of the viscous damper is the high-vis­cosity silicone fluid it
contains. The viscosities normally em­ployed in dampers range from 80.000 to
500.000mm2/s. Silicone fluid is completely transparent when new. The
loss in viscosity due to operation at increased temperatures is less in
silicone fluid than in, say, mineral oil; the viscosi­ty in fact varies in accordance
with the speed of deformation, and for this reason silicone fluids are referred
to as being of the "non-Newtonian" type. Damper life Due to the large
number of applications for viscous dampers in engine systems, the differing
stresses to which such dampers are subjected and the variations in operating
conditions, it is impossible to give more than a general guide as to when dam­pers
should be replaced. Based on experience gathered to date and on the assumption
that the damper exhibits no external mechanical damage, dampers which have been
subjected to normal loads should achieve the following life spans between
overhauls: a) Dampers on motor vehicle engines 500.000 kmb) Industrial, locomotive and marine applications 20,000
service hours (speeds exceeding 600 1/min)c) Other industrial and marine applications 30,000
to 50,000 service hours (speeds up to 600 1/min) It is possible to increase
the above mentioned periods when the proper function of the damper is checked
in regular intervals by measuring the viscosity of the silicone fluid inside
the damper. Two extraction plugs on the damper housing provide the oppor­tunity
to extract fluid samples (see chapter "Taking a silicone oil
sample"). The first sample should be taken after 10,000 hours (application
b) resp. 30.000 hours (application c). Taking a silicone oil
sample Viscous dampers equipped
with extraction plugs provide the opportunity of testing the viscosity of the
sili­cone oil inside the damper without having to dismantle it. Corre­sponding
to the condition of the silicone oil an approximate as­sessment of the damper
efficiency is possible. A silicone oil sample should be extracted as follows: - After engine stops let damper cool down to nearly
40°C (i.e. 100°F)- Rotate the damper to bring one of the extraction
plugs (6) to optimum position. Prepare the sample container (10) by
removing one of its caps (11).- Unscrew and remove the extraction plug (6) and
replace it by the sample container (10). If meeting at the inertia ring (3) unscrew the container one revolution.- Remove the second cap from the sample container and
wait until silicone fluid (5) begins to flow out from the free end. Depending on the silicone viscosity this
process needs a certain amount of time. If possible
it can be speeded up by means of 1) turning the damper until the
sample container is under­neath the crankshaft, 2) temporarily removing the second extraction plug, too- As soon as the silicone fluid begins to flow, shut
the sample container by the cap. Remove the container
from the damper casing, wipe off the sealing face round the extraction hole and
screw in the plugs together with new sealing
washers (7). Now close the second side of the container.- Tighten both extraction plugs with thumb and
forefinger then turn them further for 45° (about 20 Nm=2 kpm=170 lb ins torque).- Seal both plugs by caulking their grooves.- Send the sample container complete with the damper
type, serial number, engine and operation data to our address: AVM Diesel (F.E.)
Pte Ltd Blk 27 Tuas Ave 13 #01-23 Singapore 638993 The quantity of
silicone oil removed is so small that up to 10 such samples can be taken
without risk.The viscosity of
the silicone oil sample is best measured by the damper manufacturer, who can
assess the approximate condi­tion of the damper after analyzing the sample. The
damper ma­nufacturer will also indicate the operating period after which a
fresh sample should be tested.If it is
impracticable to submit samples to the damper manufac­turer, some other
suitable laboratory can be asked to determine the viscosity of the oil. We
recommend the use of a rotation vis­cometer with cone and plate sensor system
and contact con­trol. Damper overhauls Viscous
torsional vibration dampers with either a bolted or a welded cover can be
reconditioned “as new". General hints The viscous
damper should be treated with the same care as any other moving part of the
engine. Mechanical damage to the thin-walled damper housing can adversely
affect damper efficiency and can lead to unacceptable stresses in crankshaft
and transmission elements. If the general vibrations in the engine system rise
at any speed within the normal speed range with the engine in operation, this
can be caused by a reduction in damper efficiency and the damper should then be
exchanged and investigated at the ear­liest opportunity. In identical engine
systems dampers are fully interchangeable. It should be noted however, that
when dampers are fitted to two or more systems it will become necessary to
check the damper running time in each case.The damper surface can be
cleaned with any commercially available cleansing medium.

Re-manufacturing and Service Exchange of Viscous Vibration Dampers

We provide re-manufacturing and service exchange of engine cooling pumps from Gilkes, Jabsco and Sherwood.Gilkes pumps have been going for years.They represent the finest manufacturing quality for engineers seeking a faultless cooling mechanism built for the foreseeable future. As time goes on and technology improves, they get even better.Routine maintenance is minimal being limited solely to periodic greasing. When maintenance is eventually required, the design is such that , hydraulic components can be removed without disturbing the drive or pipeline systems. AVM Diesel is focused on the repair, re-manufacture and sale of Gilkes engine cooling pumps.We provide parts and services for the repair of Gilkes engine cooling pumps for engine repairers and vessel operators. We also served distributors and dealers of diesel engine manufacturers.We also have a ‘Service Exchange Program’ for exchange of old pump. This program allowed for the immediate shipment of a re-manufactured pump or new pump in exchange for your old pump. The re-manufacture processBecause of our desire to excel in engineering,quality and customer satisfaction, we strive to support our products through their entire life cycle. At our facilities we examine core pumps against agreed core acceptance criteria and carryout parts failure analysis. Bi-annual reviews of our failure analysis reports allow us to improve the quality and design of our products constantly.The program operates with core pumps being returned to us,evaluated against agreed core acceptance criteria and a core credit issued. All pumps are evaluated for possible re-manufacture or scrapping. With the possible exception of the impeller, the hydraulic pump components are normally re-manufactured using only the highest quality parts. Consumable components such as bearings,mechanical seal, oil seals, ‘o’ rings and gaskets etc are always replaced with new.The process of re-manufacture includes pump dismantling, de-greasing, paint stripping, sand blasting, polishing,reassembly, applying rust inhibitors and pressure testing.

Re-manufacturing and Service Exchange of  Engine Coolng Pumps

We provide service and repair of geared motors from Bauer, SEW, Nord and Lenze.On Site ServiceYou can call out our “On Site Service“ whenever you would like to discuss technical questions with our specialists “in confidence“. Our experts will be glad to help you to select the right motor for your application or support you in the project planning process. Features of this service module: - On site support- Advice from expert- Support in project planning- Support during commissioningParts LogisticsThe parts you require are available at short notice, thus preventing long machine downtimes and expensive production standstills. It also means that you don’t need to stock such parts yourself. Features of this service module:- Parts available at short notice- No need to stock parts yourself

Assembly, Service and Repair of Geared Motors

We specialise in the re-manufacturing, repair and services of viscous vibration dampers, engine cooling pumps, geared motors and custom made wheels. We have a well equipped facility with experienced and trained engineers to carry out the re-manufacturing and service works.

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Specialists in Custom-Made Wheels