Introducing the WELKER ROTARY. The future has arrived.
The Welker Rotary is a precision-made tattoo machine. Here are a few of the key features:
1. All American aircraft grade 6061 aluminum and 304
stainless steel construction (no plastic parts) similar to medical grade
2. All American made 440 stainless steel bearings.
3. Powered by top of the line German made Faulhaber DC
micro-motor with 2.6 Watt of output power and 9900 rpm of no-load speed
@12volts. Machine will run approximately
at 125cps @12 volts and drop approximately 14 cps per 1 volt reduction in power
fully loaded up with needles working the canvas.
4. RCA power connection (clip cord connection not advised
and will void warranty if an attachment is used).
5. Needle retention devise locks to the left and right to
facilitate needle loading. The amount of
pre-bend given to the needle determines tension. The retention system
can be used in the loaded (tension) position when using a t-tech type of
adaptor for exchangeable needle tips as the guide wheel of the retention system
guides the needle down the center of the tube.
6. Crankshaft driven forward and rearward slides.
7. Comes in 4 different strokes: Short- 2.5mm(.100”), Medium- 3.2mm(.125”), Long-
3.8mm(.150”) and Extra Long- 4.5mm(.175”).
8. Comes in 8 different colors.
9. Weighs 120g ( 4.25oz)
10. Produced in house at Welker machines a division of
Eternal Ink Inc.
11. Technical Patent
Pending drive system.
The internal (rearward) slide cancels out the up and down
forces generated by the front slide and needle movement. This is achieved by
matching the mass of the internal (rearward) slide to the mass of the front
assembly (front slide, needle and rubber
nipple). Across the whole range of motion
regardless of chosen stroke or running speed the internal (rearward)
slide and front assembly (front slide, needle and rubber nipple) move in
opposite directions of each other at a mechanically matched speed and distance
effectively canceling out the hopping action associated with the up and down
movement of the needle.
crank shaft has two journals driving a desmodromic type system. The crankshaft
is supported on one end by the motors internal bearings and the other end
supported by a stainless steel pilot bearing effectively taking the full load of
the forces involved with decelerating , reversing and then accelerating the
masses at 140Hz (cycles per second) off the end of the motor shaft and
displacing it between the motor and the pilot bearing effectively eliminating
any applicable motor and drive shaft flex. The crankshaft journals driving the
front and rear slides are arranged 180 degrees opposed to each other giving the
crankshaft a natural balance.
THE DUAL-PLANE DIFFERENCE
The Welker Rotary is referred to as being Dual-Plane
Our Rotary Dual-Plane Balancing system eliminates the up-and-down
shaking caused by the needle and armature bar often associated with a coil
tattoo machine. Unlike other standard rotary machines, the up-and-down shaking caused
by the movement of the front slide, has been cancelled out by our Dual-Plane design.
On a standard rotary machine, the side-to-side shaking, (the
motion that unfortunately draws ink up and out the top of the tube of a rotary
machine), is a result of an eccentric cam-type drive system attempting to
balance the up-and-down motion. This too, including the leaking ink, has been
canceled out by our Dual-Plane design.
Therefore, after canceling these effects, we achieve a
stable platform of operation with all components working within their optimal
range. Not only does this vastly reduce the fatigue experienced by the artist, it
also reduces the stress on the motor from shaft flex and various other factors
We encourage our Welker Rotary machines to be run at speeds
equal to coil liner and shader machine speeds. The optimal range of
operation is between 9.5 volts and 10.5 volts for shading and 10.5 volts to 12
volts for lining.
We have found that artists tend to start at lower voltages
due to their previous experiences with rotary machines. Once an artist starts
to become familiar with the Welker Rotary machine, they naturally begin
moving toward the normal operating speeds that coil machines are tuned to perform.
Made in the USA
For information about service and maintenance visit the link below at our Welker Tattoo Machine website. One Service Kit included with Rotary purchase.