Custom Search
} .sidebar li { margin:0; padding-top:0; padding-right:0; padding-bottom:.25em; padding-left:15px; text-indent:-15px; line-height:1.5em; } Engineering Your Knowledge - Blogged .sidebar .widget, .main .widget { border-bottom:1px dotted #006400; margin:0 0 1.5em; padding:0 0 1.5em; }Lijit Search .sidebar ul { list-style:none; margin:0 0 0; padding:0 0 0;} .main .Blog { border-bottom-width: 0; } /* Profile ----------------------------------------------- */ .profile-img { float: left; margin-top: 0; margin-right: 5px; margin-bottom: 5px; margin-left: 0; padding: 4px; border: 1px solid #006400; } .profile-data { margin:0; text-transform:uppercase; letter-spacing:.1em; font: normal normal 78% 'Trebuchet MS', Trebuchet, Arial, Verdana, Sans-serif; color: #777777; font-weight: bold; line-height: 1.6em; } .profile-datablock { margin:.5em 0 .5em; } .profile-textblock { margin: 0.5em 0; line-height: 1.6em; } .profile-link { font: normal normal 78% 'Trebuchet MS', Trebuchet, Arial, Verdana, Sans-serif; text-transform: uppercase; letter-spacing: .1em; } /* Footer ----------------------------------------------- */ #footer { width:660px; clear:both; margin:0 auto; padding-top:15px; line-height: 1.6em; text-transform:uppercase; letter-spacing:.1em; text-align: center; } -->

Thursday, August 6, 2009

Benefits of Hydroponic Gardening

A few of the benefits of planting Hydroponically:

Major Factors (Large Scale Hydroponic Farming)
As the population of our planet sores and arable land becomes less available and more expensive, Hydroponics’ may offer us an important alterior option. This is because more plants grow per square foot hydroponically than in traditional soil based gardens, as in Hydroponics, plant roots are directly fed therefore there is no competition for root space preventing roots from competing against one another! As a result you get higher yield per square foot, per unit of time.
Hydroponic systems require a lot less water than soil-based agriculture. This is due to the fact that Hydroponic systems allow recycling and re-use of water and nutrient solutions!!
Hydroponics require little or no pesticides and only a small amount of nutrients required by soil based plants!!
These are major factors that hugely benefit the environment, in large scale Hydroponic farming, and also but not so much small Hydroponic gardening!!Although ever little bit will help!!

Smaller Factors (Small scale Hydroponic Gardening)
Hydroponic gardens are less physical work than soil based gardens as there is no soil to be tilled or weeds to be picked
By eliminating soil all soil born diseases are eliminated
A small Hydroponic garden can be set up almost anywhere
If you growing indoors in a grow tent/grow garden or in a greenhouse, you can grow all year round!!
Plants grow bigger and faster Hydroponically as less energy is spent "searching for nutrients" and more on plant mass
Simple and easy to set up!!

Introduction To Hydroponics

Hydroponics comes from the Greek words meaning Hydro ("Water") and Ponos ("labour") literally meaning " water working")

Hydroponics’ basically means growing plants in a nutrient rich solution! The use of Hydroponic growing is simply just a more effective way of providing your plant with food and water than traditional methods! The science of Hydroponics’ proves that soil is not required for plant growth but certain elements, minerals and nutrients are! Soil is/was simply the holder of these nutrients and a place where traditionally plant roots live and provide support for the plant structure!!
Hydroponic plants are grown on trellises or containers (Hydroponic Kits) and can be set up to look exactly like your traditional garden!! Except with 1 little difference, the plant roots hang in a nutrient enriched solution instead of dirt! Thus providing the plant with a constant supply of food in a relative stress free environment leaving the plant to thrive!! As soil has been eliminated all soil borne disease have been effectively cut out, leaving the plant stronger and healthier therefore producing better quality and bigger size yield!!
All plants can be grown hydroponically but as usual some do it better than others!!Hydroponic growing is ideal for crop bearing plants such as cucumbers,lettuce's,chilli's,beans,tamatoes,peppers,herbs and flowering plants! Most hobbyist Hydroponic gardeners plant crops similar to what they would of done in a traditional garden!!
Methods for Hydroponic growing

1)Ebb and Flow method
2)Nutrient Film Technique(NFT)
3)Drip System
4)Passive system

These is by no means the definitive list of Hydroponic growing methods just in my personal opinion the easiest and quickest to set up and get started with
Happy Growing

Tuesday, August 4, 2009

Different Drill Shanks

The 4 Main Drill Bit Shanks

Straight Shank :

Shape: Circular Shape

This is the most common drill bit shank and is almost always made the same diameter as the fluted area (cutting area). With minimum effort these shanks can be shaped differently to increase grip and torque.

Reduced Shank:

Shape: Circular Shape

The reduced shank is most noticable by the step in the shank. This is done to provide thicker drill bits for smaller drill chucks.

SDS Shank:

Shape: 2 oppersite open ended grooves machined into the shank, 2 oppersite indentations machined into the shank.

These shanks are for drill bits uniquely suited to hammer drilling. The machined indentations and grooves allow for the hammer action. The shank must be lubricated before use.

Morse Taper Shank (MTS):

Shape: The shank is tapered with a tang at the end

The Morse taper allows the bit to be directly fitted into the drive spindle of a drill press or Lathe. The torque is transfered by friction between the tapper bit and the socket. A range of sleeves are availiable to increase the taper size to properly fit the drive spindle. The Morse taper cannot be held by a drill chuck or collet. High torque transmission is provided as long as the bit is driven hard into the material.

The Differance Between a Bolt and a Set Screw

Bolt Descriptions

The Difference Between A Bolt And A Set Screw:

The Bolt: The Bolt is characterised as with out a full thread (i.e the thread does not reach the head), this part is known as the Shank. Bolts are generally not available in the shortest lengths as there is no room for the shank, and typically you will receive a Set Screw in place of a Bolt. The Bolt allows for movement.
The Set Screw: The Set Screw is characterised as with a full thread (i.e the thread reaches the head). Used to prevent relative motion (no movement).


Metric and Imperial Bolt Markings

Metric Bolts have numbers marked on their heads to distinguish their grade. The most common being 4.8, 5.8, 8.8, 10.9, but there are a lot more grades. The manufactures markings can also be found on the head.

Class 4.8

Class 5.8

Class 8.8

Class 10.9

The numbers on the bolt represent the bolts Tensile Ultimate Strength (before the point) and the bolts Tensile Yield Strength (after the point) please see Tensile Strength for a further breakdown and calculation of this.

Imperial Bolts have line marking on their head to distinguish their grade, the most common grades being Grade 2, Grade 5 and Grade 8 .There are more grades but are not as commonly used.
The bolts are marked on their head's with diagonal lines to show what bolt grade they are:

Grade 2 Imperial Bolt is a standard hardware grade steel. This is the most common grade of steel fastener and is the least expensive. Grade 2 bolts have no head markings but a manufacture's marking may be present.

Grade 5 Imperial Bolt's are hardened to increase strength. Grade 5 bolts have 3 evenly spaced lines on the head

Grade 8 Imperial Bolt have been hardened more than grade 5 bolt's, thus they are stronger and are used in more demanding applications. Grade 8 Bolts have 6 evenly spaced radial lines on the head

Bolt Tensile Strength

Tensile Strength

High Strength Steel Bolts usually have an hexagonal head with an ISO strength rating (called property class) stamped on the head. The property classes most often used are 4.8, 5.8, 8.8, 10.9. The number before the point is approximately one-hundredth of the nominal tensile ultimate strength of the bolt in Mpa (Megapascal). The number after the point is10 times the ratio of tensile yield strength to tensile ultimate strength.
For Example

A property class 5.8 bolt has a nominal (minimum) tensile ultimate strength of 500 Mpa, and a tensile yield strength of 0.8 times tensile ultimate strength or 0.8 X 500 = 400 Mpa

Mpa = The measure of force per unit area equal
to 1 million pascals
Yield Strength = The stress point at which a material
begins to deform plastically (i.e bend)
Ultimate Strength = The maximum stress which a material can withstand
when subjected to tension, compression or shearing