Technical Data

Set Screw Collars
Socket Set Screw Size	Seating Torque Alloy (in-lb)	Maximum Alloy Axial Load (lb)	Seating Torque Stainless (in-lb)	Stainless Axial Load (lb)
6-32	10	250	7	135
8-32	20	375	15	200
10-32	35	550	25	300
1/4 - 20	90	950	70	550
5/16 - 18	170	1500	135	900
5/16 - 24	170	1500	135	1000
3/8 - 16	300	2200	235	1200
1/2 - 13	625	3000	500	1200

Clamping Collars
Socket Head Cap Screw Size	Seating Torque Alloy (in-lb)	Maximum Alloy Axial Load (lb)	Seating Torque Stainless (in-lb)	Maximum Stainless Axial Load (lb)
4-40	15	200	8	150
6-32	25	500	15	200
8-32	50	950	30	600
10-32	75	1750	45	800
1/4-28	175	2600	115	1400
5/16-24	340	6200	200	2800
3/8-24	600	7200	350	3800

Socket Head Cap Screws

Screw Size Seating Torque Seating Torque  (Inch) Alloy (in-lb)  Stainless (in-lb)  4-40 15 8 6-32 25 15 8-32 50 30 10-32 75 45 1/4-28 175 115 5/16-24 340 200 3/8-24 600 350 1/2-20 1500 875 Screw Size Seating Torque Seating Torque  (Metric) Alloy (in-lb) Stainless (in-lb) M 3  18 9 M 4 41 22 M 5 85 45 M 6 145 76 M 8 345 183 M 10 690 366

Socket Set Screws

Screw Size Seating Torque Seating Torque  (Inch) Alloy (in-lb) Stainless (in-lb) 6-32 10 7 8-32 20 15 10-32 35 25 1/4-20 90 70 5/16-18 170 135 5/16-24 170 135 3/8-16 300 235 1/2-13 625 500 Screw Size Seating Torque Seating Torque  (Metric) Alloy (in-lb) Stainless (in-lb) M 2 1.75 0.875 M 3 8 3.5 M 4 18 12 M 5 41 24 M 6 68 44 M 8 157 105 M 10 310 210

Fastener Key Sizes - Inch

Set Screw  Hex Key  SHCS Hex Key  Thread Size Size (in)  Thread Size Size (in) 2-56 0.035     4-40 0.050 4-40 3/32 6-32 1/16 6-32 7/64 8-32 5/64 8-32 9/64 10-32 3/32 10-32 5/32 1/4-20 1/8  1/4-28 3/16 5/16-18 5/32 5/16-24 1/4 3/8-16 3/16 3/8-24 5/16 1/2-13 1/4  1/2-13 3/8

Fastener Key Sizes - Metric

Set Screw Hex Key SHCS Hex Key Thread Size Size (mm) Thread Size Size (mm) M 2 0.9     M 3 1.5 M 3 2.5 M 4 2.0 M 4 3.0 M 5 2.5 M 5 4.0 M 6 3.0 M 6 5.0 M 8 4.0 M 8 6.0 M 10 5.0 M 10 8.0

Keyways - Inch

Inch Key Size Bore  Width x Depth 3/8 to 7/16 3/32 X 3/64  1/2 to 9/16 1/8 X 1/16 5/8 to 7/8 3/16 X 3/32 1 to 1-1/4 1/4 X 1/8 1 5/16 to 1 3/8 5/16 X 5/32 1 7/16 to 1 3/4 3/8 X 3/16 1 7/8 to 2 1/4 1/2 X 1/4

Keyways  - Metric

Metric Key Size Bore  Width x Depth 7 to 8 2 X 1.2 9 to 10 3 X 1.8 11 to 12 4 X 2.5 13 to 17 5 X 3 18 to 22 6 X 3.5 23 to 30 8 X 4 31 to 38 10 X 5  39 to 44 12 X 5  45 to 50 14 X 5.5

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Specifications For Catalog - Series Keyless Locking Device

Engineering / Technical Information

Selection

CLIMAX Keyless Locking Devices are designed to transmit torque, bending, thrust and radial loads, both static and dynamic, individually and in various combinations. The following information is provided to assist in proper selection:

Torque

Many CLIMAX Keyless Locking Devices will be used in applications subjected to torque only. In these applications the Peak Torque = T must be calculated and compared to the Rated Torque Capacity M_t of the CLIMAX KLD being considered.

M_t (from specification tables) > T

If Peak Torque T cannot be determined with accuracy, it is recommended that Nominal Torque = T_nom be used instead, along with an appropriate Service Factor to account for start-up or stall conditions, mass accelerations, impact loads, etc.

Nominal Torque T_nom can be calculated as follows:

M_t (from specification tables) > T_nom x Service Factor

Note that in all cases our published Rated Torque Capacity M_t is calculated without using a safety factor. Accordingly it should be assumed that a CLIMAX Keyless Locking Device connection will slip if a torque higher than M_t is applied.

All published capacities and contact pressures assume that locking screws are tightened to the published Locking Screw Tightening Torque M_a according to Climax Metal Products Company Installation and Removal Instructions. If required, torque capacities and contact pressures for installed units can be manipulated within certain limits by adjusting Locking Screw Tightening Torque M_a from its published value, as follows:

Series C200: up to 20% higher or up to 40% lower
Series C133/C193: up to 40% lower
Series C123: up to 10% lower
Series C170: up to 20% lower
Series C405/C415: up to 40% lower

Within these limits, Rated Torque Capacity M_t, Rated Thrust Capacity F_ax and Contact Pressures P_s and P_h are a linear function of Locking Screw Tightening Torque M_a.

For applications requiring 2 or more CLIMAX Keyless Locking Devices installed in series, please consult with Climax Metal Products Company for proper selection.

Thrust

The radial force applied to the shaft and mounted component by a CLIMAX KLD will resist a significant amount of axial thrust. The Rated Thrust Capacity F_ax of any CLIMAX KLD is determined using the following equation:

M_t = Rated Torque Capacity (from specification tables)
d = shaft diameter (in)

Bending Moments

Reversing bending moments are a frequently overlooked sizing factor in mechanical power transmission applications. Bending loads are present whenever a radial load – from the weight of components, belt or chain tension, etc. – acts outside the centerline of the shaft/hub connection. Reversing bending moments occur when such loads cycle between tension and compression as a mounted component rotates through 360 degrees, as is the case on rolls or conveyor pulleys. Most traditional component mounting technologies – keys and keyways, QD-style or Taper-Lock bushing systems, etc. – are not designed to transmit reversing bending loads and these conditions will typically lead to failure, whether of the connection itself, the mounted component or the shaft.

CLIMAX Keyless Locking Devices are specifically designed to transmit reversing bending moments within the following limits:

Combined Loads

It is not uncommon for CLIMAX Keyless Locking Devices to be subjected to some combination of torque, axial thrust and reversing bending. Our products are well suited for these environments, but proper selection requires calculating a resultant torque using the various applied loads, as follows:

T = Peak Torque (ft-lbs)
F = Peak Thrust (lbs.F)
B = Peak Bending Moment (ft-lbs)
d = shaft diameter (ft)

M_t (from specification tables) > T_res and M_b (see above) > B

Radial Loads

Radial loads, typically associated with pin or axle connections, occur when an applied load F_rad acts perpendicular to the centerline of the shaft. Selection of a suitable CLIMAX Keyless Locking Device is based on determining the equivalent contact pressure on the shaft P_rad, as follows:

F_rad = applied radial load (lbs.F)
d = shaft diameter (in)
L = KLD contact length (in) (from specification tables)

Then an acceptable radial load application is one in which
P_s > P_rad, AND P_s + P_rad < YP, where:

P_s = shaft contact pressure (from specification tables)
YP = tensile yield point of shaft material (psi)

Material

CLIMAX Keyless Locking Devices are manufactured from high carbon and alloy steel.

Surface Finish and Lubricity

CLIMAX Keyless Locking Devices carry rated capacities that rely upon both lubricity and surface finish. Components to be mounted using a CLIMAX KLD should be machined to achieve a surface finish of between 63 and 125 µIN RMS. A surface finish outside this range could result in a reduction of the load carrying capacity of the connection. Lubricity is likewise critically important to the successful application of our products, as it directly affects the Coefficient of Friction (COF) between mated components. Our internal Locking Assemblies are supplied and installed with ordinary machine oil on all locking screws and mated surfaces to achieve a COF equal to .12. Our external Shrink Discs and Keyless Rigid Couplings require a solvent cleaned and dry shaft interface to achieve a COF equal to .15.

Temperature

CLIMAX Keyless Locking Devices are designed to operate through a temperature range of 0º to 400º F. Note that mated components of dissimilar materials may react to temperature increases at different rates. Please consult with CLIMAX regarding such applications.

Mounting Over Existing Keyways

CLIMAX Keyless Locking Devices can be installed over existing empty keyways. Both CLIMAX Locking Assemblies and Shrink Discs should be rotated to position inner ring radial slits approximately opposite the keyway and a locking screw directly over the keyway. CLIMAX Keyless Locking Devices are not de-rated when installed over existing empty keyways.

Non-Standard Shaft Diameters

In situations where the measured shaft diameter does not match any standard CLIMAX Locking Assembly, perhaps as a result of damage or excessive wear, a simple adaptor sleeve can be fabricated to effectively “shim” the existing shaft to a standard nominal diameter. These adaptor sleeves can be slit lengthwise or left solid, with slit sleeves allowing more relaxed machining tolerances. Wall thickness should not exceed 12.5% of measured shaft diameter. Recommended machining tolerances are as follows:

+0 / -.002" on the sleeve OD;
-0 / +.001" - .002" on the bore of a solid sleeve;
-0 / +.002" - .004" on the bore of a slit sleeve.

For slit adaptor sleeves rated torque capacities for these connections is taken directly from the CLIMAX Locking Assembly selected, provided the adaptor sleeve/shaft interface is clean and dry (for a coefficient of friction equal to .15) and the adaptor wall thickness is within prescribed limits.

Plating

CLIMAX Locking Assemblies and Keyless Rigid Couplings are stocked unplated, while Shrink Discs are supplied with zinc-plated outer rings. Upon request, all CLIMAX Keyless Locking Devices can be quoted with either of two after-market plating options: industry-standard electroless Nickel or Armoloy® Thin Dense Chrome (TDC). Both plating solutions offer excellent corrosion resistance with no reduction of rated torque capacity.

Hub Strength

Calculations to Ensure Adequate Hub Dimensions

As CLIMAX Keyless Locking Devices exert high compression and expansion forces, the following formulas are presented to assist with calculations required to ensure that components mounted with our products are of adequate strength.

Applications Using CLIMAX Locking Assemblies

To ensure adequate wall thickness of the mounted component, use the following equation:

D = the published OD (in inches) of the Locking Assembly selected (from specification tables)
P_h = hub contact pressure (in psi) of the Locking Assembly selected (from specification tables)
YP = the tensile yield point (in psi) of the mounted component
C = a Pressure Reduction Factor selected based on the relationship between the length-thru-bore (LTB) of the mounted component and the contact length (L) of the Locking Assembly selected, as shown below:

Applications Using CLIMAX Shrink Discs

The component hub wall thickness for Shrink Disc applications is nominally the difference between the Shrink Disc ID and the shaft diameter. As we do not wish for the use of our products to weaken the drive system, our specifications limit the size of the shaft diameter recommended for use with each Shrink Disc to a size which results in a component hub that is at least as strong, both in bending and in torsion, as the underlying shaft.

In general, component hub material with a minimum tensile yield point of 45ksi is recommended. Cast iron component hubs are acceptable, but we recommend selecting the next larger size Shrink Disc for these applications.

To eliminate possible fretting corrosion and associated complications, when machining a hub for use under a Shrink Disc, it is recommended that the fit length be limited to the Shrink Disc inner ring length (L from the specification tables), with the remaining LTB relieved using a non-toleranced clearance. See the illustrations atop Page 28.

C600 Keyless Rigid Coupling Engineering Information

Our C600 Series Keyless Rigid Coupling is designed to simultaneously transmit the combined torque and reversing bending common to shaft-mounted drive applications. Proper coupling selection is achieved through the following procedure:

Identify nominal diameters of shafts to be joined (note that unequal shaft diameters up to a size ratio of approximately 2:1 can be accommodated). The C600 Type is selected based on the larger shaft diameter.

Refer to Figure 1 below and establish all required dimensions, including:
A = Distance (ft) from Torque Arm fixture point to C600 center
B = Distance (ft) from CG of prime mover to C600 center
L = Torque arm length (ft)
T = Maximum torque (ft-lbs) to be transmitted, including
      any desired Service Factor
W = weight (lbs.F) of the prime mover

Then…

For applications where the above analysis yields marginal results, please contact us for possible design alternatives that may qualify the application.

Shaft and Hub Tolerances

*Consult Climax Metal Products Company for diameters in excess of those shown

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Bearing Selection Factors

We recommend that testing be done in the actual operating environment to determine if a certain bearing unit is suitable for the application. Many variations can occur such as temperature, RPM, type of shafting, shock loads and support structures.

Ball Bearing Units

Note that all ball bearing units are pre-lubricated and made to ABEC-1 tolerances. The wide inner race locks securely to the shaft with set screws. A neoprene seal keeps contaminants out and allows use in wet or dry environments. Tolerates temperature range -30° to 200° F.

Load ratings for ball bearing units are based on the ball bearing insert in each unit. The dynamic load rating capacity (Lbs.) is the maximum constant radial load that a bearing can support for one million revolutions @ 33 1/3 RPM for 500 hours. Static load capacity (Lbs.) is the maximum static load (non-rotating shaft) that a bearing can support without causing permanent deformation.

Maximum speed ratings are based on light loads and reflective of bore sizes:
1/2”=6000 RPM, 5/8”=5000 RPM, 3/4”=4500 RPM, and 1”=3500 RPM

UHMW-PE and Bronze Sleeve Bearing Units

Sleeve bearings do not have moving parts and assure a low friction, smooth motion between two solid surfaces. Load capacities are expressed as a “PV” factor. To identify the “PV” factor, multiply “P” (maximum pressure in PSI on the bearing surface) x “V” (maximum sliding velocity in Surface Feet Per Minute on the shaft). The PV factor should not exceed rated max PV.

To Calculate, use the following formula:
P=Bearing Load / Bearing Diameter x Bearing Length
V=Shaft Diameter x Shaft RPM x 0.262*
*0.262” is the constant used for sleeve bearings

2D Drawings
& 3D Models
AVAILABLE