A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

A

Actuator
A mechanical device capable of producing motion, i.e. Blackalloy's Drill Unit has capability of both linear and rotary motion.
Air
Term loosely used to represent compressed air sources for use in manufacturing.
Ambient
The temperature and atmospheric conditions in the process area.
back to top
 

B

Blackalloy
The name associated with industrial cutting operations for more than half a century, and with precision Drill Units for over 20 years.
back to top

C

Clean Room
Applications characterized by the common requirement to minimize outside contamination. These type applications limit the use of lubricants and coolants. Special materials and seal materials are necessary to meet these requirements. Many medical and pharmaceutical applications require clean room features.
Collet
A tool holding device designed for maximum holding capacity and high accuracy. Each tooling size requires a separate collet.
Compressed Air
Industrial process air available for control and process uses at 30 to 150 PSI.
Counterbore
The larger diameter at the entrance of a drilled hole with a flat bottom. Similar to a countersink except for the bottom configuration.
Countersink
The larger diameter at the entrance of a machined hole with a conical bottom. Similar to a counterbore except for the bottom configuration. The general use of a countersink is for use with flat head screws and bolts.
back to top

D

Deep-Hole Drilling
Arbitrarily set at a depth/hole diameter ratio of 8:1. The torque required is generally more than shallow depth drilling and frequent tool retraction may be necessary to keep the flutes open.
DRAP
A combination drill and tap that performs both operations in one sequence. It is useful for applications where the drilling and tapping settings are similar. The operation must be on a thru-hole part since the drilling must be finished before the tapping operation begins. Call for more information.
Drill Unit
A self-feeding drill module that is designed to automate multiple hole production drilling and other rotary/linear applications.
Double Feed Control
The ability to control the feed rate for both the extension and retraction portions of the drilling cycle.
back to top

E

Extended Rear Spindle
Additional length added to a Drill Unit spindle to allow the input of liquid or gaseous media thru the center of the spindle. The additional length is usually required to connect a rotary union to the spindle. The extended spindle can also be useful in heavy duty applications to increase the life of the spline bushing.
back to top

F

Feed
The linear extension towards the work of a Drill Unit quill.
Feed Control
The method to control the drill extension towards/into the work. The simplest method is pneumatic control. Another method is hydraulic feed control, which has a more accurate feed rate because of the incompressibility of oil.
Flow Control
A precision adjustable valve used to control the flow of a gaseous or liquid media.
FPR
Abbreviation for Feed per Revolution, a term used in drilling applications to determine how fast the drill will go thru the material per revolution of the cutting tool. It is a major factor in determining the horsepower requirements for an application.
back to top

G

Gun Drilling
See Deep-Hole Drilling
back to top

H

back to top

I

back to top

J

Jacobs Taper
A standard shaft configuration that allows attachment of tool holders with minimal runout.
back to top

K

back to top

L

back to top

M

Multiple Spindle Head
A Drill Unit attachment with multiple drill or tap spindles where the spindles are gear driven from the Drill Unit spindle. They allow drilling or tapping of multiple holes in closer proximity than is possible with Drill Units alone.
back to top

N

back to top

O

back to top

P

PSI
Pounds per Square Inch, a measure of the energy stored in industrial compressed air or any other energy force.
Parabolic Drill
Drill designed for deep-hole drilling with good chip evacuation.
Peck Drilling
A technique where the tool is frequently retracted from the hole to clear drill chips and prevent clogging. It's also used to help drill straight precision holes. Generally used when the hole depth is considered to be a deep-hole.
back to top

Q

Quill
The linear guided non-rotating portion of a Drill Unit. It's purpose is to securely support the rotating spindle.
back to top

R

Rotary Union
A mechanical device that allows the transfer of a medium (air, water, coolant, etc.) from a stationary source to a rotating component.
Runout
The deviation from the desired surface or line in relation to the axis during one complete revolution.
back to top

S

Self-Contained
A Drill Unit that includes the ability to turn and extend in a compact package.
Self-Feeding
The capability to automatically extend a drilling device towards the work. The ability to automate a drilling process.
Skip Feed Control
A control valve option available with Models 151/251 Drill Units that allows multiple uncontrolled and controlled sections of the feed cycle. The valve essentially 'skips' the feed control at desired portions of the feed cycle.
Spindle
The high precision shaft that rotates within the quill and is the attachment point for the tooling.
Spline Bushing
The part of a Drill Unit that transfers power from the input shaft to the spindle.
back to top

T

Thru-holes
The hole drilled thru the spindle center to facilitate the introduction of coolant and other media to the work area. It is also useful for the introduction of a work or slug ejector pin.
Thrust
When used as a drilling parameter it is the exertion forces of a tool into the work transmitted by the Drill Unit.
TIR
Total Indicator Reading is the total movement of a dial indicator for the deviation of a surface from it's theoretical perfect dimension. In drilling, it is an indication of the deviation of the cutting tool's centerline axis from it's theoretical true centerline.
Trilobe
Trilobe is a superior polygon profile designed to eliminate the common failures associated with splines and keyed shaft attachment methods. It is used for mechanical connections that are stronger, more precise and have a substantially longer service life than other common methods. The trilobe profile is self centering, a property important in maintaining minimum spindle runout.
Two-Hand Anti-Tie-Down
A safety arrangement suited for machinery where position of an operator's hands must be monitored. Operator must actuate both push buttons simultaneously to obtain an output signal.
back to top

U

back to top

V

back to top

W

back to top

X

back to top

Y

back to top

Z

back to top

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

  back to top

Blackalloy Company of America • 1836 Lonestar Street • Unit 3 • Conway, SC 29526

Tel: (843) 347-3390 • Fax: (843) 347-3391

Website Design and Development by Industrial Web Solutions