dualvee motion technology - teausa.net · krytox gpl 227 is a dupont product. alvania # 2 is a...

315

• ®The DualVee system exhibits up to 50% lower noise than round or square rail re-circulating ball guides (circular

raceway design vs. sharp 180° end cap returns).

Lubricators

® DualVee

Single Edge Track

with Patented

Mounting Shoulder

Bushings

®DualVee Motion TechnologyThe flexibility and simplicity in design offers infinite number of design possibilities with components easy to understand.

•Speeds in excess of 5.5 metres per second and accelerations in excess of 5 g's can be achieved due to a

circular raceway design and retained ball bearing construction.

•Inherent surface velocity gradient along the rolling contact area sweeps debris aside. ® DualVee is predominant antifriction bearing technology for use in contaminated environments.

•Butt joining of track is easily accomplished and provides for virtually unlimited stroke lengths.

• ®The DualVee system has the lowest installed cost (no ground surfaces required); N grade accuracies are

achievable with machine reference edges.

•••

Installation is simple, fit up adjustment is accomplished via simple rotation of eccentric guide wheels.

Lubricators and wheel covers allow for long re-lubrication intervals. ®DualVee is operable without lubrication in applications where the use of grease or oil is prohibitive.

•All sizes of track, wheels and bushings are generally in stock.

® DualVee Carriage Plate

Assembly

Track Base

Wheel Covers

® DualVee Guide Wheels

Typical Mountings

W0X 14.83 4.00 6.35 5.94 9.12 52100 52100 52100 304 A591 NBR Alvania 2

(0.584) (0.1575) (0.250) (0.234) (0.359)

W1X 19.58 4.76 7.87 7.95 11.89 52100 52100 52100 Nylon 66 A591 NBR Alvania 2

(0.771) (0.1875) (0.310) (0.313) (0.468)


(1.210) (0.3750) (0.438) (0.500) (0.719)


(1.803) (0.4724) (0.625) (0.750) (1.063)


(2.360) (0.5906) (0.750) (1.000) (1.375)

W4XXL 75.39 22.00 25.40 31.75 44.45

(2.968) (0.8661) (1.000) (1.250) (1.750)

W1SSX 19.58 4.76 7.87 7.95 11.89 440C 440C 440C Nylon 66 304 NBR Alvania 2

(0.771) (0.1875) (0.310) (0.313) (0.468)


(1.210) (0.3750) (0.438) (0.500) (0.719)


(1.803) (0.4724) (0.625) (0.750) (1.063)


(2.360) (0.5906) (0.750) (1.000) (1.375)

W4SSXXL 75.39 22.00 25.40 31.75 44.45 440C 440C 440C Nylon 66 304 NBR Alvania 2

(2.968) (0.8661) (1.000) (1.250) (1.750)9, 10W1SS227 19.58 4.76 7.87 7.95 11.89 440C 440C 440C 304 304 None Krytox227



(1.803) (0.4724) (0.625) (0.750) (1.063)10W4SS227 59.94 15.00 19.05 25.40 34.92 440C 440C 440C 304 304 None Krytox227

(2.360) (0.5906) (0.750) (1.000) (1.375)

52100 52100 52100 Nylon 66 A591 NBR Alvania 2

Guide Wheel Dimensions & Materials

Notes: 1. "A591"shield material (JIS SECC) is cold rolled carbon steel with electrolytic zinc coating (classified by ASTM A591). "304" reflects 304 stainless steel. 2. "NBR" seal material is nitrile butadiene rubber. 3. All dimensions are in mm & (inches). 4. Bore ID tolerance is +.0000, -.0003 inch, except W4XL. 5. W4XL Bore ID tolerance is +.0000, -.0004 inch. 6. Width tolerance is +.0000, -.0047 inch. 7. Krytox GPL 227 is a DuPont product. Alvania # 2 is a Shell Oil product. 8. "52100" reflects hardened AISI 52100 bearing steel (Rc 60-62); "440C" reflects hardened AISI 440C stainless steel (Rc 58-60). 9. High Temperature Compatible - Heat stabilized components allow for operating temperatures to 500°F.10. Clean Room Compatible - All stainless steel components are internally lubricated with Krytox GPL 227.11. Guide wheels are manufactured to ABEC class 5 tolerances.12. Weights: W1 - 12g, W2 - 40g, W3 - 136g, W4 - 285g.

All dimensions are subject to change without notice.

MDw OUTSIDE

MDw INSIDE

W

A B

90°

90°

60°

316

PartNumber

OutsideDiameter

A

BoreSize

4,5B

Width6W

InsideVee

RadiusMDwInside

OutsideVee

RadiusMDw

Outside

Outer8Race

Inner8Race

8Ball 1Retainer 1Shield 2Seal 7Grease

3,11 Dimensions in mm & (inches) Material

317


Guide Wheels

MDw OUTSIDE

MDw INSIDE

W

A B

90°

90°

60°

LA

LR

Notes:1. Sizing and selection should be based on working load capacity ratings according to the sizing guidelines presented in the technical reference section. See load/life relationship page 321.2. Working load capacities reflect lubricated wheel/track interface.3. W..X = steel version, W..XSS stainless steel version.4. Load Capacities for all versions of Guide Wheels see page 322.5. For Studded or Integral Studded Guide wheels please go so www.tea.net.au for further data and specifications.6. For Wheel Cover and Lubricator Assemblies please go so www.tea.net.au for further data and specifications.

Part Number Radial Load (N) Radial Load (lbf) Axial Load (N) Axial Load (lbf) Weight (g)

WDW2SSX 2420 544 400 89.9 37.8

WDW3SSX 5200 1169 580 130.4 128.3

a

a

Size Outside Diam. A Bore Size B Width W Inside Vee Outside Vee(+.0000, -.0003in) (+.0000, -.0047in) Radius MD Radius MDW W

2 30.73 (1.210) 9.53 (.3750) 11.13 (.438) 12.70 (.500) 18.26 (.719)

3 45.80 (1.803) 12.00 (.4724) 15.88 (.625) 19.05 (.750) 27.00 (1.063)

a

a

Washdown WheelsProven to extend life in harsh and extreme environments.FDA approved grease.AISI type 440C stainless steel balls and races.Unique outer shield and inner seal for exceptional protection from liquids and debris.Ideally suited for food and beverage applications, as well as high speed water jet cutting machinery.Use together with DualVee standard AISI 420 stainless steel track.

a

mm (inch)

PartNumber

W0 146 28 650 123

W1X (SS) 274 57 1220 252

W2X (SS) 596 141 2650 625

W3X (SS) 1326 382 5900 1701

W4X (SS) 2181 900 9700 4001

W4XXL 3215 1473 1430 6552

Radial Working Load Capacity

LRmax1, 2(lb )f

Load Capacity (lb )f Load Capacity (N)

Axial WorkingLoad Capacity

LAmax1, 2(lb )f

Radial WorkingLoad Capacity

LRmax2,3(N)


LAmax2,3(N)

318

Single Edge Track - Undrilled

DualVeeTrack

Part No.

• Easy installation/available from stock• Single edge design allows for flexible track pair spacing• Patented mounting shoulder allows for accurate positioning of Vee ways• Available from stock as induction hardened, polished and undrilled, AISI1045 carbon steel• Induction hardened track remains soft below the mounting shoulder, allowing for drilling or other machining • 420 stainless steel available on request• Can be easily butt-joined for stroke lengths exceeding maximum single piece lengths (4 mtrs)• Single edge track with drilled mounting holes available - please go to www.tea.net.au for further details and specifications. • Size 0 double edge track, drilled and undrilled available - please go to www.tea.net.au for further details and specifications.

MSC

MSD

VIRTUALAPEX

90°

W

H

MDT

MountingShoulderLocation

MDTmm (inch)

Width

Wmm (inch)

Height

Hmm (inch)

MountingShoulder toCentre Line

MSCmm (inch)

MountingShoulder

depthMSD

mm (inch)

Weight

Kg/m (lbs./ft)

T1 11.10 (0.437) 4.75 (0.187) 3.17 (0.125) 0.79 (0.031) 1.57 (0.062) 0.272 (0.183)

T2 15.87 (0.625) 6.35 (0.250) 4.75 (0.187) 0.79 (0.031) 2.39 (0.094) 0.510 (0.343)

T3 22.22 (0.875) 8.71 (0.343) 6.35 (0.250) 1.57 (0.062) 2.77 (0.109) 1.03 (0.690)

T4 26.97 (1.062) 11.10 (0.437) 7.92 (0.312) 2.36 (0.093) 3.17 (0.125) 1.64 (1.100)

Track available from stock to 4 metres cut to 500mm incrementsPlease advise exact length required at time of ordering, as there is a 5mm cutting wastage.

Ordering Example:T1-1000 represents a 1 metre length of hardened, carbon steel, size 1 trackT1-1000-SS represents a 1 metre length of stainless steel size 1 track

Notes:1. All dimensions are in mm and (inches).2. The overall length tolerance is ±1.6mm / ±1/16 inch.3. For non-standard track lengths or other non-standard options, contact TEA for quotation.4. Maximum single piece track lengths: hardened = 6.096 mtr, unhardened = 6.7056 mtr.


319

Bushings

Most sizes from stock (* Available on request)Notes:1. All dimensions are in mm for metric bushings, and inch dimensions for imperial bushings.2. Standard material 303 stainless steel.

®3. The bushing's outside diameter is designed to fit the corresponding size DualVee guide wheel. Outside diameter (OD) tolerance is +0.00mm, -0.01inch (.25mm)4. Part # X_ indicates eccentric (adjustable) bushing; rotation of eccentric allows fit up adjustment between track and guide wheels.5. All mounting information within this catalogue assumes a central position of the eccentric bushing, thus allowing wheel position adjustment from "+EC" to "-EC".6. Part # MB or B_ indicates concentric (stationary) bushing; Since concentrically mounted wheels have a fixed position, these bushings set the alignment of the carriage assembly to the rail. Concentrically mounted wheels should be configured to carry the majority of the load whenever possible.7. Head height (HH) tolerance is ±0.001 inch and ±0.03mm.8. Inside diameter (ID) tolerance is +0.002, -0.000 inch and +0.05mm -0.00mm.

• Rigidly affixes guide wheels to a mounting surface in a precise, orthogonal fashion• Material: 303 stainless steel• Concentric and eccentric configurations allow for fit up adjustment• Design calls for a fastener to pass through the bushing and the guide wheel, locking the elements into place against the mounting surface

Ø

Ø

Ø

Concentric (MB)

Ø

Ø

Eccentric (MBX)

Met

ric

Bush

ings

DualVeeSize

MB1 M4 - - 6.22 7.6 13.8 4.76 3.96 11.2

MBX1 M4 12 0.25 6.22 7.6 13.8 4.76 3.96 -

MB2 M6 - - 6.65 10.8 17.4 9.52 6.00 14.2

MBX2 M6 14 0.61 6.65 10.8 17.4 9.52 6.00 -

MB3 M8 - - 9.47 15.6 25.1 11.99 8.00 19.1

MBX3 M8 19 1.07 9.47 15.6 25.1 11.99 8.00 -

MB4 M10 - - 11.10 18.8 29.9 15.00 10.00 22.4

MBX4 M10 22 1.52 11.10 18.8 29.9 15.00 10.00 -

MB4XL M14 - - 14.35 25.1 39.5 21.97 14.00 31.8

MBX4XL M14 30 1.52 14.35 25.1 39.5 21.97 14.00 -

PartNumber

RecommendedFastener Size

HexSizeHS

OffsetEC

HeadHeight

7HH

LengthBodyLB

LengthOverall

LO

OutsideDiameter

3OD

InsideDiameter

8ID

HeadDiameter

HD

1

2

3

4

4XL *

B1 #6 - - 0.250 0.300 0.550 0.1873 0.140 0.44

BX1 #6 7/16 0.012 0.250 0.300 0.550 0.1873 0.138 -

B2 1/4 - - 0.281 0.425 0.706 0.3748 0.250 0.56

BX2 1/4 9/16 0.024 0.281 0.425 0.706 0.3748 0.250 -

B3 5/16 - - 0.375 0.615 0.990 0.4722 0.312 0.75

BX3 5/16 3/4 0.042 0.375 0.615 0.990 0.4722 0.312 -

B4 3/8 - - 0.437 0.740 1.177 0.5904 0.375 0.88

BX4 3/8 7/8 0.060 0.437 0.740 1.177 0.5904 0.375 -

B4XL 9/16 - - 0.565 0.990 1.555 0.8650 0.563 1.25

BX4XL 9/16 1 1/4 0.060 0.565 0.990 1.555 0.8650 0.563 -

1a

2

3

4

4XL *

Inch

Bus

hing

s


Studded Guide Wheels - Thru Hole Style

DualVeeSize

SWAC1 W1

SWAC1X W1X

SWAC1SSX W1SSX

SWAC1SS227 W1SS227 1.00 0.2352 0.59 0.35 0.083 0.238

SWAE1 W1 (25.4mm) (5.97mm) (15.0mm) (8.9mm) (2.1mm) (6.0mm)

SWAE1X W1X 0.015

SWAE1SSX W1SSX (0.4mm)

SWAE1SS227 W1SS227

SWAC2 W2

SWAC2X W2X

SWAC2SSX W2SSX

SWAC2SS227 W2SS227 1.54 0.3926 0.98 0.59 0.104 0.323

SWAE2 W2 (39.1mm) (9.97mm) (24.9mm) (15.0mm) (2.6mm) (8.2mm)

SWAE2X W2X 0.024

SWAE2SSX W2SSX (0.6mm)

SWAE2SS227 W2SS227

Notes:1. Stud material is AISI 416 stainless steel.2. Journal Diameter (OD) Tolerance is +0.0000, -0.0007 (+0.00 mm, -0.02 mm).3. Shoulder Thickness (S) Tolerance is ± 0.001 (± 0.03 mm).4. Vee Height (VH) Tolerance is ± 0.002 (± 0.05 mm).5. Eccentricity (EC) Tolerance is ± 0.005 (± 0.13 mm). All mounting information in this catalogue assumes a central position of the

eccentric stud allowing adjustment from plus "EC" to minus "EC".6. Nuts are manufactured to DIN standard 934 (18-8 stainless steel).7. Washers are manufactured to DIN standard 125 (18-8 stainless steel).8. See guide wheel specifications for detailed data on wheels.9. See load/life discussion in the technical reference section for sizing and selection information (pages 229-232).

1

2

W

N

T

HSØ OD

N

JL JL

TL TL

SS

EC

HVHH VHHS

Ø OD

T

W

Concentric Stud Eccentric Stud

• DualVee guide wheels with integral stud and mounting hardware

• Easy installation

• Consolidates multiple components into one part

number, making procurement simple

• Available on request only

®

AssemblyPart

Number

GuideWheel

OffsetOverallLength

M6 x 1 12mm M6

M10 x 1.5 14mm M10

JournalDiameter

JournalLength

ThreadLength

ShoulderThickness

VeeHeight

HexSize

Nut &Washer

Thread

EC5

H OD2 JL TL T S

3VH

4HS N,W

6,7

All dimensions are in inches and (mm) unless otherwise stated

216

Lubricator Assemblies

LubricatorProfile

• Easy to install

• Dispenses a thin film of oil along the Vee way

• Lubricating properties increases load capacity

and service life

• Stainless steel lubricator housing

• Lubricator assemblies available on request

DualVeeSize

PartNumber

L

MountingHole

Spacing

MHS

Height

B

BodyLength

H

Width

W

VeeHeight

VH

FastenerHole

Location

FD

1 & 2StandardHeight(for use withstandard heightmetric bushings)

3 & 4

1.10 0.787 0.47 0.69 0.45 0.435 0.18 0.12

(28.0 mm) (20.0 mm) (12.0 mm) (17.5 mm) (11.4 mm) (11.0 mm) (4.6 mm) (3.0 mm)

1.84 1.339 0.84 1.20 0.74 0.753 0.29 0.17

(46.7 mm) (34.0 mm) (21.3 mm) (30.5 mm) (18.8 mm) (19.1 mm) (7.4 mm) (4.3 mm)

TL12A

TL34A

FD

H

B

L

MHS

FS

W

VH

S

W

OverallLength

FastenerHole SizeDiameter

FS

Notes:1. All dimensions in inches and (mm) unless otherwise stated.2. Lubricator housing material per specification ANSI 303, 304, or 316 stainless steel.3. Felt material is white, pure wool, per specification SAE F-10 or ASTM 9R1.4. Lubricators are supplied complete with socket head cap screws and washers (stainless steel).

PartNumber

TL12AStandardHeight

Hardware

LubricatorProfile

TL34A

Washer

W3

M2

M3

Fastener

S3

M3 x .5 x 6 mm

M4 x .7 x 8 mm

221

320

Mounting Dimensions / Formulas

®When fabricating a DualVee linear guide fromcomponentry, the following (formulae) areapplicable for mating carriage plate and trackplate designs:

®For sizes 1 through 4 DualVee single edge trackwith equivalent sized guide wheels:

• Inboard Mounting (See Figure 1): A = B + X• Outboard Mounting (See Figure 2): A = C - X• Exterior Mounting (See Figure 3): A = D - YA = hole centres for wheel plate

DualVeeSize

1

2

3

4

Notes:®1. Information above uses the same size DualVee track and

wheel except for size 4XL which uses W4XXL guide wheel with size T4 track.2. Side views shown only, length of wheel plates can be any length required.3. It is recommended that wheel plates be constructed with concentric bushings on one side of the plate and eccentric bushings on the opposing side.4. "D" dimension is to the theoretical sharp of the 90°angle.

®for DualVee -basic wheel plate and track plate assemblies

A

D

A

B

Figure 1 Inboard Mounting

A

C

Figure 2 Outboard Mounting

Figure 3 Exterior Mounting

0.874 22.2 0.934 23.7

1.374 34.9 1.436 36.5

2.000 50.8 2.124 53.9

2.624 66.6 2.750 69.9

3.124 79.3 3.500 88.94XL

X

inch mm

Y

inch mm

Applications

TEA's clean room compatible guide wheels are manufactured

from 440C stainless steel bearing elements, and contain

stainless steel retainers and shields. They are internally

lubricated with synthetic, corrosion resistant, clean room

compatible grease.

For clean room operation, it is often desirable to plate the

track with thin dense chrome (armoloy), black oxide, or

electroless nickel. Stainless steel track can also be specially

cleaned prior to heat treat and then passivated. Contact T.E.A.

applications engineering for assistance with your clean room

linear guidance questions. Higher level assemblies, custom

engineered to accommodate specific clean room requirements,

can be furnished by T.E.A. Contact T.E.A. for particle emissions

data.

Clean Room Products

All T.E.A. high temperature guide wheel products are

manufactured from specially processed, thermally

stabilised, 440C stainless steel. Lubricated with a specially

formulated synthetic grease, these guide wheels are

capable of operating in temperatures up to 500°F. Special

consideration should be given to guide wheel based

designs when operating above temperatures of 300°F.

Designers must make sure that a suitable lubricant is used

on the wheel track interface, and if lubrication is

prohibitive, the appropriate derating of the bearing

should be factored in.

High Temperature Products

319

Operation Considerations

®Lubrication is the key to maximizing the life of a DualVee ®linear guide. Internally, DualVee guide wheels are

lubricated for life with an extreme pressure, corrosion

resistant grease. However, lubrication of the wheel/track

interface is the responsibility of the user. A light machine

oil or an extreme pressure grease will serve well in

minimising wear, stick slip and corrosion on the guide ®ways in a DualVee based design.

Lubrication will maximise the load capacity of an

individual bearing element. As such, for any specific

application loading condition, the presence of lubrication

on the guide ways will significantly increase the service life

over a non-lubricated configuration under the same

loads.

Lubrication will also increase the maximum linear velocity ®that a DualVee bearing arrangement can endure. In

applications where high speed or high acceleration rates

are present, lubrication of the wheel/track interface is

highly recommended. Lastly, lubrication will reduce the

overall coefficient of friction of the guide, which,

depending on the level of preload, can fall anywhere

from 0.008 to 0.015. The availability of lubricators and

wheel covers gives design engineers an opportunity to

design lubrication right into the DualVee mechanism with

little effort. See specifications on wheel covers and

lubricators for more detail.

Lubrication

®Using DualVee Motion Technology , achieving

straightness and flatness characteristics to within N grade

accuracy levels is fairly routine (±0.004 inch; ±0.10

mm). In fact, accuracies as low as ±0.001 inch (±0.03

mm) have been achieved using carefully prepared

mounting surfaces in relatively short stroke applications

(1-3 feet; 0.3-1 m). For designs requiring accuracy levels

of ±0.005 inch and better, mounting surfaces must be

prepared straight and flat, and appropriate doweling or

reference edge assembly techniques must be employed.

®In most DualVee applications, accuracy plays a small

role in successful implementation and in such cases, cold

finished or extruded bars provide adequate mounting ®surfaces for DualVee raceway design. Mounting surface

reference edges no longer require a chamfer, as the ®DualVee track design has been upgraded to include a

relief in the locating shoulder.

Figure 1: Running parallelism end view

Figure 2: Allowable tolerances for straightness and flatnessof travel - grade N

N

±

N

0.004 (±0.10 mm)

±0.004 (±0.10 mm)

Precut lengths of track are not suitable for butting end to

end. Please contact the factory when track lengths longer

than the maximum available single piece lengths are

required. Track that is suitable for butting is available on

request. When constructing track systems longer than 20

feet, the joints on parallel tracks should be staggered for

greater accuracy and smoothness.

®Precut lengths of DualVee track plate assembly are not

suitable for butting end to end. Where track plates longer

than the maximum length are required, please consult

T.E.A. for butt-joining recommendations.

Track Splicing Considerations

Accuracy

For single carriage measured at any point along the rail:

Variation in carriage height: ±0.004 inch (±0.10 mm)

Variation in carriage width: ±0.004 inch (±0.10 mm)

For multiple carriages measured at the same location

along the rail:

Variation in carriage height: ±0.001 inch (±0.025 mm)

Variation in carriage width: ±0.001 inch (±0.025 mm)

320

Operation Considerations cont.

For maximum loading and heavy continuous use, the "T"

series hard edge track should be used. For prototype or

light duty intermittent use, the "TS" series (unhardened, as

formed) track can be used at a lower cost.

Track Hardening

The stationary bushings determine the alignment of the

system. They should carry the major load whenever

p o s s i b l e . W h e e l s s h o u l d b e c o n f i g u r e d

such that the load is predominantly radial whenever

possible.

Normal adjustment is obtained by rotating the eccentric

bushings until all free play is removed from the carriage

assembly. When the eccentrics are adjusted and the

carriage plate is held firmly in place, one should be able

to rotate, by hand, any of the four guide wheels in the

system against its mating track. If rotation is not possible,

preload on the wheels should be reduced accordingly.

Overtightening of the eccentric adjustment could result in

premature bearing failure. Such a condition can exert a

force greater than the load rating of the wheel.

Fit-Up Adjustment

Figure 3: Linear guide configured primarily radial load

Figure 4: ® DualVee track mounted with stand-offs eliminates dirt traps

W

Since the circumference of the wheel is greater at the

major diameter than at the minor diameter, there is a

constant wiping action on the track producing a self ®cleaning effect. As such, DualVee guide wheels are

employed in a wide variety of harsh environments,

including the presence of metal chips, powders, fibres,

slurries, etc. It is important to note that such environments ®will often limit the service life of a DualVee linear guide

to some extent. Since environments vary from application ®to application, it is recommended that DualVee systems

be prototyped before employing on a large scale. For

instance, an OEM who is building a paper processing

machine may want to prototype a linear guide in

application where the guide ways are exposed to unique

combinations of chemicals and paper fibres. It's difficult to

predict exactly how the materials will behave in many

cases. For instance a fine, yet hard powder material may

accelerate wear in one case but simply be swept aside in

another, depending on parameters such as particle size,

temperature, humidity, and lubrication. Regardless, ®DualVee is clearly the choice of antifriction linear guide

technology in difficult environments, particularly when

success is mandatory and reliability is critical.

The other main factor affecting wear resistance is

lubrication. Wheel covers or lubricators should be

designed in whenever possible. Both will distribute a thin

coating of oil lubricant along the contact surface of the ®DualVee track. The wheel covers offer added protection

by preventing debris from entering the wheel/track contact

surface. Lubricated and relatively clean wheel/ track

contact surfaces will ensure maximum service life in a ®DualVee linear guide.

Contamination/Wear Resistance

For wash down applications, stand-offs can be used to

mount track to a mounting surface, eliminating dirt traps,

and allowing for washdown (see sketch below).

Wash Down Environments

321

The Load/Life Relationship

Several factors influence the service life of a DualVee®

linear guide. Through research and development

spanning over thirty years, BWC has devised a simple

method to estimate the load/life relationship for a specific ®DualVee guide mechanism under defined loading

conditions. The methodology accounts for the size of the ® DualVee bearing elements, relative spacing, and the

orientation, location, and magnitude of the load.

The curve is based upon clean and well lubricated track

conditions; so for applications where lubrication is

prohibitive, a derating factor must be applied.

It is important to note that secondary considerations such

as maximum velocity, acceleration rates, duty cycle, stroke

length, environmental conditions, the presence of shock,

vibration and extreme temperature ranges can all impact

service life to varying degrees. As such, the sizing method

outlined below should be used conservatively, and ®considered only as a guideline for the sizing of DualVee

components and assemblies. When time and budget ®permits, the prototyping of a DualVee arrangement is

recommended to confirm service life expectations.

The Load/Life Equation -Sizing and Selection

LF = LA / LAmax + LR / LRmaxWhere L F = Load Factor

LA = Resultant axial load on the guide wheelLAmax = The maximum axial working load

capacity of the guide wheelLR = Resultant radial load on the guide wheelLRmax = The maximum radial working

load capacity of the guide wheel

ApplicationConditions

Clean, low speed, low shock, low duty

Moderate contaminants, mediumduty, medium shock, low tomedium vibration, moderate speed

Heavy contamination, highacceleration, high speed, mediumto high shock, high vibration, highduty cycle

AdjustmentFactor

1.0-0.7

0.7-0.4

0.4-0.1

The load/life estimation requires a basic understanding of

the principles of statics, the ability to work with free-body

diagrams, and the capacity to resolve externally applied

forces on a carriage assembly into the radial and axial

reaction forces at each guide wheel in the design.

The life of a DualVee® guide will be limited to the life of

the most heavily loaded bearing in the design.

Step 1: Calculate the resultant radial and axial loads

reflected to each bearing element in the linear guide

design.

All standard considerations involved in statics calculations

must be accounted for, including inertial forces,

gravitational forces, external forces such as tool pressure,

bearing element spacing, magnitude and direction of the

payload. Any external forces that generate a reaction

through the wheel/track interface need to be considered.

If assistance is required in resolving specific loads into the

resultant reaction forces at the guide wheel interface,

contact our applications engineering staff for support.

Step 2: Calculate the load factor for the most

heavily loaded bearing.

• Bearings should be sized such that L <1F• The most heavily loaded bearing will have

the highest load factor

Due to varying application load, speed parameters and

environmental conditions, the appropriate adjustment

factor must be applied to the maximum axial and radial

working load capacities (L and L ) as follows:Amax Rmax

Oscillating motion resulting in less than one full revolution

of the wheel under load can cause accelerated wear on

the internal bearing elements.

Testing of such systems is recommended to verify

compatibility of the design with load/life requirements.

W0 146 28 650 123

W1 274 57 1220 252

W2 596 141 2650 625

W3 1326 382 5900 1701

W4 2181 900 9700 4001

W0X 146 28 650 123

W1X 274 57 1220 252

W2X 596 141 2650 625

W3X 1326 382 5900 1701

W4X 2181 900 9700 4001

W4XXL 3215 1473 14300 6552

W1SSX 274 57 1220 252

W2SSX 596 141 2650 625

W3SSX 1326 382 5900 1701

W4SSX 2181 900 9700 4001

W4SSXXL 3215 1473 14300 6552

W0SSCR 121 23 540 102

W1SS227 228 47 1013 209

W2SS227 494 117 2200 519

W3SS227 1101 317 4897 1412

322

DualVee Guide Wheel Load Capacities

Notes:1. Basic Dynamic Load Rating, According to AFBMA STD 9-1990. Based on industry standard bearing calculations and are for comparison purposes only. Maximum working load figures should be used for component sizing and selection.2. Basic Static Load Rating, According to AFBMA STD 9-1990. Based on industry standard bearing calculations and are for comparison purposes only. Maximum working load figures should be used for component sizing and selection.3. Working load capacities reflect clean, well lubricated wheel/track interface.4. For Operating Considerations - Lubrication; Track Splicing; Accuracy; Track Hardening; Contamination/Wear Resistance, Fit-up Adjustment and Wash-down Environments please go to our web site www.tea.net.au to download data pages.

Step 3: Apply the load factor to the load/lifeequation below:

Life = LC / (L3

)FWhere LF = Load Factor

LC = Life Constant

Life constants are provided in both inch and metric as tabulated.

DualVeeSize

1

2

3

4

61.65 x 10 41

62.19 x 10 55

63.47 x 10 87

65.19 x 10 130

66.84 x 10 171

68.58 x 10 2154XL

Life Constant

inches of travel life kilometres of travel life

0


PartNumber

Radial Working Load Capacity

LRmax1, 2(lb )f

Load Capacity (lb )f Load Capacity (N)


LAmax1, 2(lb )f

Radial WorkingLoad Capacity

LRmax2,3(N)


LAmax2,3(N)

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Thank you for viewing product information on TEA’s range of engineering components. Now please contact us at the nearest office to you for any further information, prices and availability: AUSTRALIA & New Zealand USA, South America & Canada T.E.A. Transmissions Pty Ltd T.E.A. Machine Components Inc. Tahiti Road 2281-F Dabney Road Tiaro Qld 4650 Richmond Virginia 23230 Australia USA Ph: 61-(0)7 4129 2533 Ph: 1-804-342-0004 Fax: 61-(0)7 4129 2437 Fax: 1-804-342-0006 Email: [email protected] Email: [email protected] www.tea.net.au www.teausa.net

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