As a company, we would be looking at making a 35% profit on each crane supplied. If bulk orders were to be placed, we would be able to supply the cranes at a cheaper per unit cost, but will also be able to buy them cheeper.
if a 100 units were ordered; the retail price of each crane would be £585.90 therefore 100 units = £5,859.
these prices are excluding any shipping/duty taxes associated. 35% profit is resonable to both parties as £585.90 is much cheaper than any of the 'competitors' cranes, including a certain crane made from wood?
For countries prone to natural disasters and devolping ecconomies, our product is the best suited for them as the reliability and practicality, are not sacrificed over afordability.
Chosen by our Chief Desgner, the following hand pump is the most suited for our crane. It is Hydraulic-powered, and is also relativley light at 5.6 kg. This pump is also of rugged construction meaning it is well suited in the type of environments that the crane would be mostly used.
12cc Pump + Relief Valve + 3 Litre Reservoir
Double acting hand pump with lever
Complete with reservoir
12cc per cycle
Adjustable Relief Valve
Stainless steel piston rod
Pump cartridge: all steel construction
Hi strength aluminum body
Nickel plated parts
Low operating effort required
ISO 9001
Rugged construction
Low leakage
Long life, hard wearing Buna seals are standard
3 litre reservoir capacity
High Strength aluminum and PTFE Nickel plated screws
It has still not been confirmed whether we are going to use a electric or hand-powered winch. If we do decide to go down the powered route, then a very good candidate is the GP23000. Below are the specifications of this product.
Capable of 1043kg loading
12v DC
weight 6.4kg
Mechanical and Dynamic Brake
Full-metal Planetary Gear-train
Freespooling Clutch for Fast Wire Rope Payout
High Efficiency Low Amp Draw Motor
Commercial Grade Contactor Pre-mounted and Sealed Against the Elements
Circuit Breaker Protected
Durable Handheld Remote Switch on 15' Lead
Cable Tension Plate
£188 exc VAT
Also the performance of this Winch is listed below.
Line Pull (kg)
Line Speed
(m/m)
Motor Amps 12V
0
4.7
8
227
3.8
30
454
3.0
60
680
2.1
90
816
1.8
108
1043
0.5
140
Dimensions;
The problems with using an electric-winch are;
where will the power come from? battery powered?
how long will this winch last under ~maximum loading?
can the cost of this winch be justified? (£188 exc VAT, £220.90 incl VAT )
how long will it take to actually lift the 1000kg weight?
all these questions will have to be discussed before anything regarding this winch is finalised...
The majority of the components of our product will be made from Aluminium 7075. whilst doing research and gathering information, I was unable to find any companies willing to give quotes for such small manufacturing outputs like this (only ~9 components). Material manufacturers were easily sourced, but production wise i could not find any company willing to produce such few components. On the off chance i found a company ( details below) who were able to not only supply the material, but also give an approximate quote of manufacturing each component. Other interchangeable components ( winch, paint, hand pump ect.) were sourced within the U.K. Each price was given in Dollars and converted to G.B.Pounds.The winch has been included but may vary as its type is yet to be decided.
The pricing is as follows:-
V.T support cap
£16.50
V.T support base
£23.36
V.T support
£66.12
Piston ring
£7.80
Piston
£55.13
Piston rod
£40
Crane legs ( x 4 & incl. horizontal supports)
£65
Beam
£125
Crane base
£35
Red oxide protective paint (2.5 litres)
£19.64
Hand grips (x 4)
£15.96 (£3.99 each)
12V rechargeable electric Winch
Hydraulic hand pump
£188
£148.46
Total cost for 1 x Crane
£805.97
The price above includes shipping to mainland U.K to either Liverpool or Portsmouth docks. This quote was obtained from the company “Zhangjiagang Deke Co., Ltd.” Located in Jiangsu, China.This price is for one crane and if a bulk order were required, the individual cost of a crane would dramatically decrease. We are still waiting for an email reply from them, regarding the bulk order price.
seen as the height adjustment of the crane will be hand operated, a suitible material to make the adjustment as easy and as comfortable as possible, is required. Typically rubber or a plastic based material is required. Below is a diagram with the differing types available.
The hand-grip to be implemented in our product will be of the type G design. This is one of the most heavy-duty type designs available, and is made from PVC via the dip-moulded process. The main emphasis on this part of the product is style over substance as this will be used in rough terrain. We will require 4 hand-grips per crane, one for each leg.
In the table below, I have listed the approximate dimensions of each component. Although the dimensions may be altered in the future, the component list is final. The 3-D Computer Aided Designs of each component will be uploaded shortly by the Chief Designer.A number of online quotes from leading material suppliers have been requested and we are just waiting for the reply.
In the meetings, as a group it has been decided that it is more financially viable to source material suppliers overseas. That is why we have been looking into mainly ‘developing’ countries such as China, India as well as the United States. Financial details to follow.
After researching many types of possible materials, the material chosen by our Materials Specialist (Usman Javaid) is Aluminium 7075. The characteristics of this materials and properties are :-
Lightweight
best suited for processing techniques
very high strength -to-weight ratios
very good corrosion resistance
mostly used where high strength is required.
properties (youngs modulus, yeild strength etc. )detailed in previous post
A36 Steel is produced in a wide variety of forms, such as plate, structural shapes, pipe, bar and sheet. This material can also be welded very cheaply and easily, and it can also be bolted and riveted which meet all the requirements for our product so far. Although Aluminium has lower Young’s Modulus/ U.T.S/Yield strength, if implemented in the project it would make the crane light and easy to transport. The next stage is to look into other factors such as the costing, the manufacturability (can it be easily shaped/welded into the desired form etc.) and also if it is physically capable of carrying a 1000kg load.
