User's Manual

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Thrif-T Luber Low-Pressure

Orifice Lubrication System

pump ﬂ ow to the individual lube points. Various accessories are

available to simplify installation. An optional pressure gauge may

be added to monitor pump operation.

SYSTEM COMPONENTS

Pumps

One hand-operated pump and one electric motor driven pump,

each with a 1/2 gallon plastic reservoir, and adjustable output,

allow the system to be designed precisely for the applications

needs.

Timer

The built in Solid State Timer can be set to control pump run

duration and initiate lube intervals from 30 seconds to 32 hours.

Where desired, optional remote timers, can be used to control the

lube interval and pump run time.

Manifolds and Oriﬁ ce Fittings

One manifold can be used to distribute lubricant to as many as

nine (9) lube points. Oriﬁ ce Fittings come in three (3) types and

ten (10) ﬂ ow ranges to meet various lube requirements. Bearing

point Oriﬁ ce Fittings are fed directly from the pump through

individual branch lines.

Tubing, Fittings and Accessories

Thrif-T Luber Oriﬁ ce Systems utilize 4mm (5/32 inch) nylon

tubing and brass ﬁ ttings to connect the system components.

Accessories such as the line ﬁ lter and pressure gauge enhance

reliability and provide the user with a method to monitor pump

operation.

COST-EFFECTIVE LOW-PRESSURE ORIFICE

LUBRICATION SYSTEM

• For new equipment or replacement of any existing low-

pressure oriﬁ ce system

• Simple, versatile and reliable

• With sales, parts and service - worldwide

FEATURES/BENEFITS

Thrif-T Luber Oriﬁ ce Systems offer an efﬁ cient method of

applying lubricant, resulting in less machine downtime, increased

productivity, and a safer work environment. Thrif-T Luber Systems

go beyond these advantages to provide:

• Easy system design and modiﬁ cation.

• Inexpensive components and installation.

• Fast payback! Savings in lube maintenance; man-hours

usually pays for the system within the ﬁ rst year.

• Manual or Electric pumps available to ﬁ t a wide variety of

applications.

• Both Manual and Electric pumps feature adjustable outputs.

This allow two pumps to service small to large systems.

• Oriﬁ ce ﬁ ttings have only one moving part and it ﬂ exes rather

than moves.

• Sintered bronze ﬁ lters will not shred or clog as can happen

with felt ﬁ lters.

SYSTEM DESCRIPTION

The Thrif-T Luber Oriﬁ ce System is a single line resistance

type. When the timer, controller, or operator activates the pump,

lubricant is forced down a single main line to manifolds, and

from there through individual oriﬁ ce ﬁ ttings and lines to the lube

points. If lube point mounted oriﬁ ce ﬁ ttings are used, tee ﬁ ttings

and manifolds are used to provide multiple branch lines that are

then connected to the oriﬁ ce ﬁ ttings.

Thrif-T Luber Oriﬁ ce Systems utilize one of two types of pumps.

A single stroke hand operated pump, where the stroke length and

frequency determine the lube delivery volume to the system, or

an electric gear motor driven pump where the pump running time

and frequency as established by the built in timer, a remote timer,

or the machine PLC determine the volume of lubricant delivered to

the system. In either case, the individual oriﬁ ce ﬁ ttings proportion

Summary of content (16 pages)

PAGE 1
Thrif-T Luber Low-Pressure Orifice Lubrication System COST-EFFECTIVE LOW-PRESSURE ORIFICE LUBRICATION SYSTEM • For new equipment or replacement of any existing lowpressure oriﬁce system • Simple, versatile and reliable • With sales, parts and service - worldwide FEATURES/BENEFITS Thrif-T Luber Oriﬁce Systems offer an efﬁcient method of applying lubricant, resulting in less machine downtime, increased productivity, and a safer work environment.
PAGE 2
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 SYSTEM OPERATION Interchangeability As shown in Figure 1, when the operator actuates the handle, or when the electric motor receives a signal from the timer, the pump is activated. The pump dispenses lubricant either into the mainline tubing which distributes the lubricant to the manifolds, feeding each Oriﬁce Fitting or lines supplying bearing point Oriﬁce Fittings.
PAGE 3
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 THRIF-T LUBER MANUAL PUMP DESCRIPTION/OPERATION The Thrif-T Luber Manual Pump (Fig 2) is a positive displacement single stroke pump that delivers 8.2 cc (0.50 cu.in.) of oil per stroke, or 3.6 cc (0.22 cu.in.) per stroke. As the pump handle is pulled up, the return spring is compressed and the inlet check ball unseats allowing oil to enter and ﬁll the piston chamber.
PAGE 4
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 5.50 (140) THRIF-T LUBER MANUAL PUMP (CONT'D) D A PUMP STROKE ADJUSTMENT The standard Thrif-T Luber Manual Pump is factory set for a lube output of 8.2 cc (0.5 cu.in.) per stroke. To determine if the pump output needs to be reduced, multiply the total system volume requirement by the lube interval in hours. Pump output should be equal to, or greater than this amount.
PAGE 5
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 THRIF-T LUBER ELECTRIC PUMP (CONT'D) OPERATION The electric gearmotor drives an eccentric (A) which reciprocates the piston (B) in the pump body (C). The lubricant is discharged past an internal check valve through the outlet (D). If lube system pressure exceeds 10 bar(150 psi), the relief vale (E) automatically opens.
PAGE 6
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 THRIF-T LUBER ORIFICES DESCRIPTION/OPERATION The Thrif-T Luber Oriﬁce Fittings are available in three (3) conﬁgurations and 10 size ranges. Each size (5/0 is smallest, 5 is largest) passes twice as much ﬂow as the size below it. Each is equipped with a sintered bronze ﬁlter, tapered spiral oriﬁce pin and built in check valve.
PAGE 7
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System Thrif-T Luber Oriﬁces (Cont'd) LTL-400 DIMENSIONS mm (Inches) TYPE A - FIGURE 13 Description Part No. Old Part No.
PAGE 8
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 THRIF-T LUBER ACCESSORIES & HARDWARE Pressure Gauge for use with Thrif-T Luber Electric Pump has plastic case with 50.8 mm (2-in.) diameter dial and 0 to 21 bar (0 to 300 psi) range. Has 1/4-18 NPTF center back mount. 600 400 30 200 Nylon Tube–Has 4 mm (5/32-in.) O.D., and is burst rated at 69 bar (1000 psi). Comes in 7.62 m (25 ft.) coiled lengths.
PAGE 9
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 THRIF-T LUBER ACCESSORIES & HARDWARE (CONT'D) Tee Fitting–For use with two 4 mm (5/32-in.) tube outlets and 1/8-in. pipe. Measures 28.4 x 25.4 x 15.9 mm (1.12 x 1.00 x 0.62 inches). Compression Sleeve–For 4 mm (5/32-in.) tubing. Note: Can be used with inverted nut, or bearing ﬁtting. Figure 26 Figure 22 Inverted Nut—Brass tube nut to attach 4 mm (5/32-in.) tube to manifold. Closure Plug –Has 7.9 mm (5/16-in.) UNF-2A full thread to within 1.
PAGE 10
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 System Design & Component Selection STEP FIVE: Determine system ﬂow value. Guide to System Design & Component Selection for low-pressure, oriﬁce type lubrication systems. • Multiply each ﬂow value from column 9 by number of taps in column 3. Enter in column 10. • Add up the total ﬂow values in column 10. Enter at bottom of column 10. This is total system ﬂow value (Q).
PAGE 11
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 System Design & Component Selection Cont'd EXAMPLE: Milling Machine, 7200 SUS Oil, 60OF Operating Temperature, Automatic System 24 Lube Points Bearings: 1. Feed Screw — ball screw — 1 .5 pitch dia. x 8 rows, 2 lube points 2. Vertical Slide Drive — ball screw — 1 .5 pitch dia. x 8 rows, 2 lube points 3. Vertical Slide — 9" wide x 18" long, 2 lube points 4. Horizontal Slide — 9" wide x 18" long, 2 lube points 5. Vertical Slide Ways — 1 .
PAGE 12
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 SYSTEM DESIGN & COMPONENT SELECTION CONT'D Oriﬁce Selection 1. Select oriﬁce size based on ﬂow requirements. 2. From our example, we would have 24 total lube points. (Bottom of column 3, Design Chart A). They are in ﬁve sizes, as follows: 2. If, in the example, we were using a manual pump (system is realistically too large for manual pump), the pump output is factory set @ .50 Cu.in./stroke.
PAGE 13
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 SYSTEM DESIGN & COMPONENT SOLUTION Plumbing — Preﬁlling the System — Lubricant ﬂow velocity within this system is relatively low. To assure accurate proportioning through the various oriﬁces in the system, it’s important that velocity remain low. Signiﬁcant pressure drop through long delivery lines may affect the volume of oil delivered by the oriﬁce ﬁtting at the end of that line. For general application, 4 mm (5/32 in.
PAGE 14
Thrif-T Luber Low-Pressure Oriﬁce Lubrication System LTL-400 Design Chart A DESIGN CHART D DESIGN CHART B Plain Bearing Area = π x D x L D = shaft diameter L = length of bearing Slide, Gibs & Ways A = width x length + travel Anti-Friction Area = shaft diameter2 x number of rows Gears (calculated each gear in train) Area = π x Pd x W Pd = pitch diameter W = width of gear Ball Screw Area = π x Pd x rows x travel Pd = pitch diameter of ball race Rows = number of rows in engagement with shaft Note
PAGE 15
Page 15 2 BEARING 3 3 3 3 3 3 3 3 3 6 7 8 9 10 11 12 13 14 GRACO, INC. 18901 Cranwood Pkwy, Cleveland Ohio 44128 216-581-2000 (OHIO) FAX 216-581-8945 1-800-USA-LUBE (A) DIAMETER WIDTH OF CYLINDRICAL BEARINGS - LENGTH AND WIDTH OF SLIDES - SHAFT DIAMETER OF ANTI-FRICTION BEARINGS AND NUMBER OF ROWS.
PAGE 16
All written and visual data contained in this document are based on the latest product information available at the time of publication. Graco reserves the right to make changes at any time without notice. Contact us today! To receive product information or talk with a Graco representative, call 800-533-9655 or visit us online at www.graco.com. ©2006-2011 Graco Inc. Form No. LTL400 Rev. C 11/11 Printed in U.S.A.