Exlar Catalog 2008

The Global Leader in Actuator Technology For over a decade Exlar has been the global leader in actuator technology. Our patented roller screw linear actuators have always offered the most compact, robust and durable designs - lasting up to 15 times longer than similar sized ball screws. Our T-LAM brushless motor technology provides the industry's highest torque density which results in very compact actuators with high force and speed capabilities. We continue to expand our product lines through the use of these powerful technologies. We offer two other product families not included in this catalog. The Extrak family of actuators is Exlar’s new rodless actuator line consisting of a precision aluminum frame with a movable platen. Designed for heavy duty, continuous motion applications, the Extrak product line is ideal for industrial positioning or material handling applications with their high speed and long stroke length capabilities. Also available in a separate brochure is Exlar’s Tritex Series actuators. These revolutionary units completely eliminate the need for any external motor, servo drive or position controller. All these devices are integral components of Tritex actuators. With the Tritex family, Exlar has combined internal servo drive power and control with long-life roller screw and robust brushless motor technologies to offer a lowcost, high-value electric alternative in pneumatic, hydraulic or electromechanical applications. Please contact Exlar to receive either of these separate brochures. You may also visit www.exlar.com and download the brochures complete with all specifications. We invite you to review both our new and field-proven actuators to see how Exlar's unique products will give you the most effective rotary and linear actuation for your applications. We would welcome the opportunity to discuss your requirements and make a recommendation.

Table of Contents

page

FT Series Linear Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 SLM & SLG Series Motors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 95 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 113 ER Series Rotary Hazardous Location Products . . . . . . . . . . . . . 115 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 120

GSM Series EL Series I Series

I Series Linear Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

FT Series

EL Series Linear Hazardous Location Products . . . . . . . . . . . . . . 55 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59

SLM/SLG Series

GSM Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53

ER Series

GS Series Linear Actuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 GSX Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Ordering Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35

GSX Series

Roller Screw Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

Engineering Reference . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .127

Cables and Feedback

Cables and Feddback . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .121

Why Consider Roller Screw Technology Designers have five basic choices when it comes to achieving controlled linear motion. The table on page 2 gives you a quick overview of what general advantages are associated with each. Because the roller screw technology common to all Exlar linear actuators might not be familiar to everyone using

1

this catalog, allow us to present a general overview. Roller Screw Basics A roller screw is a mechanism for converting rotary torque into linear motion, in a similar manner to acme screws or ball screws. But, unlike those devices, roller screws can

carry heavy loads for thousands of hours in the most arduous conditions. This makes roller screws the ideal choice for demanding, continuous-duty applications.

The difference is in the roller screw’s design for transmitting forces. Multiple threaded helical rollers are assembled in a planetary arrangement around a threaded shaft (shown above), which

converts a motor’s rotary motion into linear movement of the shaft or nut.

Roller Screw vs Hydraulic & Pneumatic – Comparisons:

Roller vs Ball Screw Performance – Comparisons: Loads and Stiffness: Due to design factors, the number

In applications where high loads are anticipated or faster cycling is desired, Exlar’s roller screw actuators provide an attractive alternative to the hydraulic or pneumatic options. With their vastly simplified controls, electro-mechanical units using roller screws have major advantages. They do not require a complex support system of valves, pumps, filters and sensors. Thus, Exlar units take up much less space and deliver extremely long working lives with virtually no maintenance. Hydraulic fluid leaks are non-existent. Noise levels are reduced significantly. Additionally, the flexibility of computer programmed positioning can be very desirable in many applications.

of contact points in a ball screw is limited by the ball size. Exlar’s planetary roller screw designs provide many more contact points than possible on comparably sized ball screws. Because this number of contact points is greater, roller screws have higher load carrying capacities, plus improved stiffness. In practical terms, this means that typically an Exlar roller screw actuator takes up much less space to meet the designer’s specified load rating.

Travel Life: As you would expect, with their higher load capacities, roller screws deliver major advantages in working life. Usually measured in “Inches of Travel,” the relative travel lives for roller and ball screws are displayed on the graph on page 2. As you can see there, in a 2,000 lb. average load application applied to a 1.2 inch (approximate) screw diameter with a 0.2 inch (approximate) lead, you can predict that the roller screw will have an expected service life that is 15 Times Greater.

Speeds: Typical ball screw speeds are limited to 2000 rpm and less, due to the interaction of the balls colliding with each other as the race rotates. In contrast, the rollers in a roller screw are fixed in planetary fashion by journals at the ends of the nut and therefore do not have this limitation. Hence, roller screws can work at 5000 rpm and higher – producing comparably higher linear travel rates.

Exlar Corporation • 952.368.3434

Lifetime Comparison (Roller vs Ball Screws) 10,000

GSX Series

Thrust Load (pounds)

Roller Screw Ball Screw

1,000

2000 lbf load 1.2˝ diameter .2˝ lead screw comparison 0 0

1,000,000

10,000,000

100,000,000

1,000,000,000

Lifetime (Inches of Travel)

Roller Screw vs. Other Linear Motion Technologies (Used in electronic positioning applications)

EXLAR ROLLER SCREWS

ACME SCREWS

BALL SCREWS

HYDRAULIC CYLINDERS

PNEUMATIC CYLINDERS

Very High

High

High

Very High

High

Very long, many times greater than ball screw

Very low, due to high friction & wear

Moderate

Can be long with proper maintenance

Can be long with proper maintenance

Speed

Very high

Low

Moderate

Moderate

Very high

Acceleration

Very high

Low

Moderate

Very high

Very high

Electronic Positioning

Easy

Moderate

Easy

Difficult

Very Difficult

Stiffness

Very high

Very high

Moderate

Very high

Very low

Shock Loads Relative Space Requirements

Very high Minimum

Very high Moderate

Moderate Moderate

Very high High

High High

Low

High

Low

High

Moderate

>90%

approx 40%

>90%