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T T PRECISION ENGINEERING

We are a CNC Engineering company based in South Woodham Ferrers, Chelmsford.

We hope you enjoy our website, why not look at the services we offer or get in touch.

DYNAMIC CONE PENETROMETER

The DCP (Dynamic Cone Penetrometer) is an instrument designed for the rapid insitu measurement of the structural properties of existing road pavements constructed with unbound materials.

Continuous measurements can be made down to a depth of 850mm or, when extension shafts

The DCP requires 3 operators; one to hold the instrument, one to raise the weight and one to record the results.

Well proven, robust design
Made in England
Fully plated
Portable and easy to operate
Tests can be carried out in minutes

Standard Kit

Drop weight: 8 kg
Drop height: 575 mm
HardendCone: 60 °
Testing depth: 850 mm

Dimensions

Case size approximately 110 x 25 x 15 cm
Weight approximately 22 kgs

Optional Extension Rods

1mtr rods (with incremental measurement lines)

Optional Weight change

6kg , 10kg weight etc….

DYNAMIC PROBE EQUIPMENT

Dynamic Probe Rods are manufactured from heat-treated alloy steel, with graduations marked every 100mm, along the 1 meter length.

The rods ends butt-up fully against each other when driving, forming a resistance to the driving force. This stops threads getting damaged.

Spanner flats make rods easy to connect and disconnect

Rods are made in the following sizes:

35mm Rods – 1 meter and 1/2 meter long

22mm Rods – 1 meter and 1/2 meter long

DYNAMIC PROBING CONES

Probe cones are used for Dynamic Probing which determines the resistance of soils in-situ in accordance with BS 1377 Part 9.

Probe cones can be sacrificial or retained and are available in Bright Mild Steel.

T T Precision Engineering stocks the items detailed below as standard but can manufactured to customer specifications.

Two types of Dynamic Probing Apparatus
Part	Heavy (DPH)	Super Heavy(DPSH)
Drive Weight (kg)	50 ± 0.5	63.5 ± 0.5
Drop Height (mm)	500 ± 10	750 ± 20
Nom. Cone Area (cm²)	15	20
Cone Diameter (mm)	43.7 ± 0.3	50.5 ± 0.5
Cone Mantle Length (mm)	43.7 ± 1	50.5 ± 2
Cone Tip Length (mm)	21.9 ± 0.1	55.3 ± 0.4
Drive Rod Diameter (mm)	35	35
Drive Rod Mass (kg/m)	6	8
All cones have a 90° point, and may be sacrificial (without thread), or retained (with thread).

HAND AUGER KIT/CLIP-ON CONNECTION

A comprehensive set for augering all types of soil down to a depth of 8-10 metres. These kits are specifically designed for use in soil research studies and are made to a high standard to ensure a long service life.

Clip-on connection: The advantage of the clip-on connection is that it is very fast with little weight. The clip-on connection is strong, rigid and long lasting

Hand Auger Kit consisting of:

• 6 x 1 metre clip-on rods
• 1 x Driving Handle
• 2 x Dutch Hand Augers S/L (55mm and 75mm diameter)
• 7 x Slide Tubes for clip-on rods
• 1 x Short tube for clip-on rods
• 1 x Solid clip-on adapter for driving handle

• 1 x Heavy Duty Carry Bag

HAND AUGER KIT/SCREW THREAD CONNECTION

Screw thread connection: This connection is based on male and female thread on the parts to be coupled. The use of tapered threads for connection allows you to simply hand tighten the connection to create a rigid construction.

Hand Auger Kit consisting of:

• 6 x 1 metre Auger rods
• 1 x Driving Handle
• 2 x Dutch Hand Augers S/L (55mm and 75mm diameter)
• 5 x Couplings

• 1 x Heavy Duty Carry Bag

MACKINTOSH PROBE

The Mackintosh Probe is a hand operated lightweight and portable penetrometer. It is a considerably faster and cheaper tool than boring equipment especially when the soils under investigation are soft or loose.

Can be used to a depth of 16 metres.

Mackintosh Probe Kit consisting of:

• 1 x Mackintosh Probe Hammer

• 6 x 1mtr Rods 9/16 BSF

• 5 x Knuckles 9/16 BSF

• 1 x Mackintosh Probe Point

• 1 x Heavy Duty Carry Bag