The Product

The Product

TESTAR experience has allowed the development of the Red Crown product line a product with innovative

•eatures that satisfies the most demanding market standards.

Red Crown pencil probes consist of the fo owing basic parts:

1 - Contact. Interchangeable (M2,5 or 4-48 UNF thread - standard mod-

el made of tungsten carbide, R=1,5 mm).

A wide range of optional contacts is ava able, to suit all specific meas-

uring requirements. The "soft touch" models are typically supplied

with interchangeable nylon contact to prevent surface damage.

2 - Gaiter. It is made of rubber (Fluoroelastomer) and protects the in-

ternal mechan-ical parts from dust or liquids (IP65).

It allows the product to function in the workshop, even in the harsh-

est conditions. The "soft touch" models are provided without gaiter

for consistent low measuring force

3 - Pencil probe body. The stainless steel body has a hardened sur-

face. to prevent damage to mechanical sliding parts in the event of

high tightening torques.

The entire range of pencil probes includes versions with an external

body diameter of both 8h6 mm and 3/8”.

4 - Guide system. Mounted on ban bearings, guaranteeing optimum

s iding movement of the mechanica parts.

5 - Anti-rotation feature. Facilitates contact sssembly/disassembly.

6 - Spring. Determines the measuring force with which the contact

touches the workpiece.

In addition to the standard spring normally supplied, there is a wide

-ange of options springs, for a greater or lower measuring force.

The "soft touch" models are provided with special spring type to

aliow ow measuring force (0.30 N at electrical zero with horizontal

probe axis).

7 - Transducer. The transducer is made using high tech materials and

production processes, which guarantee great precision. It is available

in two configurations, full-bridge (LVDT) and ha f-bridge (HBT). allowing

customization of the pencil probes to suit any electronic system on

the market.

8 - Pre-travel adjustment. This device allows optimum adjustment of tan-

gential interference with the workpiece to be checked. Pre-travel adjust-

ment extends the life of the sliding parts inside the pencil probe

9 - Cable spring. Always present. the cable spring guarantees an op-

timum cable curve radius, preventing damage.

10 - Cable. The 2 meters cab^e (EMC standards - directive 89/336/EEC)

is highly resistant to tears and is covered with a sheath made of

special material highly resistant to coolants. The cable outlet may be

axis： or radial. Extensions of various lengths are also avaHable

11 - Pneumatic push - Vacuum retract. Some models can be fitted

with a manual or automatic pneumatic device to retract the contact

(vacuum retract) or to move the contact to the measuring position

(pneumatic push).

These functions are particularly useful for automatic applications.

The “soft touch" models are designed to guarantee a tip force at

electrica zero of 0,18 N.​ 

Examples of Applications

Dimensions (mm)

The clamping diameter of all versions is avaiiable both as 8h6 mm or 3/8”.

± 0,5 mm

± 1 mm

土 2,5 mm

± 5 mm

DIMENSIONS MEASURING RANGE

±0.5 mm 土 1 mm ±2,5mm 土 5mm

S 장y애' Siano'ard Preum. Push Leng .Range (LR) Standard Pneum. Push Sta的라d Pneum. Push

Standard Pfieum. Push

A 39,2 80 - - - 92.5 - 118 -

A1 42.8 86 86 116.6 1166 989 98.9 124 124

A2 - 92,5 - - - 105 - 130,5 -

B 19,2 57 57 76 76 68 68 84,5 84,5

c 92 13,5 13,5 25 25 15 15 21 21

D 10,8 9,5 - - - 9,5 - 12,5 -

(*) Fcr pneurratic version only.

(**) Right cable adapter is always suppl ec with the probes with axia cable outlet.

A/A1 /A2/C refer to the electrica zero​