Case Study: Hatchable Preheat Oven for
Ship Engine Shaft Couplings
This oven can be modified to suit your application,
just call us at 888-763-6836
||Multinational Ship Repair and Conversion Company
|Part to be Preheated:
||Ship Engine Shaft Couplings
|Target Preheating Temperature:
|Number of pieces to be heated at one time:
|Required preheat time frame:
At Keen, we are committed to providing custom industrial ovens for a
variety of parts preheating applications. We often receive requests from ship repair and conversion companies that need hatchable ovens, in other words, ovens that can fit through narrow hatches commonly
found on today's ships. In this particular application, ship
engineers were performing an engine overhaul that required the
preheating of couplings in n oven on location before bonding them to
a shaft. The hatchable preheat oven needed to fit deep into the ship
and be available while work was being performed in the engine
The engineers had one of our popular K-450 electrode ovens
on the ship for welding electrode storage, and called us asking if it
could be lengthened and reinforced at the back and placed upright so
that it could fit in a tight space. We gladly reworked the standard oven design and made it a top-loading preheat oven, the K-450TL. The
ship engineers had two types of couplings - one would be top-loaded
into the oven, and one horizontally-loaded. A shelf was needed for
the coupling that was loaded horizontally, and needed to be
We apologize for not having more photos available of
this custom oven, but it was a rush job and production packed and
shipped it before the marketing department could take photos.
For this particular parts preheating application we designed a custom
industrial preheating oven from scratch and called it the K-450TL.
To solve the unique logistical problem of installing the oven into
the hull of a ship, our engineers tack welded ring and pad eyes on
the front of the frame so the custom oven could be lowered through a series of hatches into the hull of the ship where the engine room was
The width of our standard K-450 already allowed the oven to
fit through ship hatches, so we were already set in that respect.
The oven just now needed to be lengthened to accommodate the
couplings. Also, the element on our standard K-450 rests at the
bottom of the oven (when horizontal) so we needed to change the
wiring design and element location to the rear of the oven (when
horizontal) or bottom of the oven (when vertical). We strive to
solve unique parts preheating challenges for our clients.
The K-450TL custom oven is useful for a variety of purposes, not just
for ship engine couplings. The temperature range can be modified for
any application. A dial-adjustable analog thermostat was installed
for this oven but we can use different controls to suit a variety of
K-450TL Industrial Oven Specifications:
Shelving Style: Perforated Steel - One Lower Shelf / One Upper Shelf
Temperature Control: Analog Dial-Adjustable
Cycle: 50 or 60
Wattage: 1,100 Watts
On/Off Light: Yes
Thermostat Temp Range: Ambient-550F
Interior Dims:19.5" Diameter x 20.5" Deep
Net Weight: 125 lbs.
Shipping Weight: 175 lbs.
This is a round, barrel style industrial oven that can be positioned
vertically or horizontally. The oven has a steel reinforced base
onto which an analog-style adjustable dial thermostat is mounted.
No digital controls were necessary for this oven because the ship
engineers just wanted to leave the K-450TL oven on all the time at
one specific temperature.
This dial thermostat is our standard
analog unit with a 150F-550F temperature adjustment range. It's
important to note that the door hinges on this custom oven are tack
welded to the oven frame and not screw mounted. This allows for a
long product life. Always beware of any industrial ovens that do not
have welded hinges. This oven is powder-coated - as with all our
ovens - at our in-house paint facility and is highly durable for a
wide variety of industrial settings.
The K-450TL custom oven is constructed of carbon steel and is
insulated throughout. It has a 1000W heating element installed at
the back/bottom of the oven behind a perforated steel grate to
prevent the ship bearing from coming in direct contact with the
element, but at the same time to allow the heat to radiate into the
oven chamber. There were no shelves installed this oven due to
interior dimension constraints, and because the ship engineers needed
all of the available space inside the preheat oven to preheat the
bearing. The interior of the K-450TL preheating oven is painted
with a reflective, galvanized paint and the interior welds are
touched up with high-temperature aluminum paint.
All our preheating ovens are made in the USA and feature a 1-year
limited manufacturer's warranty. Parts are readily available.
Frequently Asked Questions:
Q. Can this hatchable oven be modified for other applications?
A. Yes, absolutely. Many of our custom ovens have resulted from
client requests to modify an existing oven they have seen on our
website, or to one of our standard welding electrode ovens that a
client may be using for welding applications. The process usually
begins like this: a client finds one of our ovens that has an
interior size close to what can accommodate the parts that need to be
preheated, and then inquires if modifications can be done. Our
engineers get to work to provide suggestions to the client as to what
modifications can be done. If the modifications are not suitable, we
design a new oven from scratch to fit the users needs.
Q. What is a preheat oven?
A. We use the term preheat oven to describe an oven that is used for
preheating parts before they are used in some type of application.
Most of our preheat ovens are custom-designed according to the
specific application being performed by a client. Many processes
require the preheating of weldments before they are bonded to some
other type of metal. This preheating is required to change the
property of the metal part and enable it to be installed onto another
part. Our ovens are used in many applications. The K-450TL
hatchable oven used on ships is just one example. We have designed
ovens for bowl shafts, cylinder heads, cylinder blocks, military tank
transmissions and for many other types of parts.
Q. Do you provide CAD drawings for review?
A. Yes. Keen's custom oven design process typically begins with a
discussion of the various solutions we are able to provide to the client. If the client wants to proceed, we then do a CAD drawing
for review that clearly outlines the custom oven design for the
client to review.
Q. Do you manufacture gas-fired ovens?
A. No. We only manufacture electrical ovens with a maximum
temperature range of 1000°F
Q. Are your products made in USA?
A. Yes. We manufacture our ovens in Louisiana.
Q. How long have you been in business?
A. Henkel Enterprises, LLC, manufacturer of the Keen brand of
welding ovens, flux ovens, and custom preheat ovens has been in
business since 1923.