Glossary

440C STAINLESS:
A high carbon chromium alloy hardened for increased durability and mechanical properties suitable for the workplace.

8620:
Alloy steel carburized and hardened yielding a high surface hardness and tough core.

ALLOY STEEL:
Refers to carbon grade steel with a chemical makeup consisting of different materials that is hardened to increase strength and enhance mechanical properties.

BLACK OXIDE:
A surface finishing that blackens the steel.

BLIND TAPPED HOLE:
Refers to a female threaded hole that does not go through.

CARBIDE:
All carbide products are produced using a high impact wear grade Tungsten carbide.

CARBIDE TIPPED:
Refers to an assembly with a steel body and a carbide contact surface.

C’BORE:
A stepped hole able to accommodate a SHCS.

DELRIN (Acetal):
A thermoplastic material with high strength properties, low coefficient of friction and very resistant to chemicals and absorbtion.

DUROMETER:
Refers to the relative firmness or hardness of an elastomer material. Soft elastomers are measured in the ‘shore A’ scale.
Comparisons:

20 durometer comparable to stiff foam
35 durometer comparable to pencil eraser
60 durometer comparable to a car tire
80 durometer comparable to an inline skate wheel
95 durometer comparable to plastic

H/T:
Heat treated. Process to harden steel

LHSCS:
Low head socket cap screw fastener

M-2/H.S.S. – HIGH SPEED TOOL STEEL:
M-2 grade steel used for all “HS” products, and is generally H/T (heat treated) to Rc 60/62

NEOPRENE:
A synthetic rubber also known as polychloroprene that is resistant to ozone, sunlight, oxidation and many petroleum derivatives.

NITRILE:
A rubber resistant to petroleum oils and aromatic hydrocarbons.

O-RING:
A round rubber ring made of Viton used to seal out contaminants.

PRECISION BEARING:
A bearing with hardened and ground races for higher loads and true running.

REPLACEABLE PAD:

REST PADS:
A smooth surface pad available in delrin, carbide and hardened steel.

SEALED PRECISION BEARING:
A sealed bearing with hardened and ground races for higher loads and true running.

SERRATED/ TOOTH PATTERN:
The spacing between each gripper’s tooth (known as the pitch) is available in 1/16, 3/32, 1/8 and 3/16. Additional gripper variations include a straight or diamond serration style of teeth.

SHCS:
Socket head cap screw fastener

STANDARD BEARING:
Inexpensive bearings with radial float used for low speed applications.

URETHANE:
A rubber that offers good elongation and high tensile strength along with excellent abrasion and tear strength.

VITON:
A fluoroelastomer rubber resistant to a wide variety of corrosive fluids at high temperatures. Viton is also resistant to weathering ozone, oxygen and flame while holding good tensile strength, resilience, and low compression set.

ROLLER INSERTS:
All “inserts” in rollers and bumpers are manufactured from low-carbon mild steel unless otherwise indicated.

DIFFERENCE BETWEEN STANDARD & PRECISION BEARINGS:
Standard - some radial float (floppy/loose)
lower load capacities
free running

Precision - very little radial float
higher load and rpm capacity
available in sealed type for severe application

BR:
A Brake Roll is fitted with a one direction bearing allowing it to free wheel only in one direction. It may be dissassembled to reverse directional control.

HOW TO DETERMINE LEFT OR RIGHT FOR A BRAKE ROLL:
With the stud held stationary and face up, the roller will free wheel clockwise for right and counter clockwise for left.

R or RP:
Roll only is the roller material bonded to a thin wall steel core/insert. “P” refers to precision type.

B or BP:
Bearing only is a bearing assembled into a roller. “P” refers to precision type.

C or CP:
Complete is a roller assembled with a bearing, nut, bolt and stand-off spacer for mounting. “P” refers to precision type.

CPC:
A roller assembled with a sealed precision bearing, nut, bolt and stand-off spacer for mounting.

EX:
Extended hub for shaft drive applications. “EX” will always be followed by a number which refers to the shaft size. [i.e. EX500 accommodates a 1/2” shaft]