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®
WWW.SUPERBOLT.COM
07
07
Why Superbolt
®
Tensioners?
An Old Problem:
Large diameter bolting presents
several problems. The strength
of a screw fastener increases
with the square of its diameter,
however, the torque required
increases with the third power.
requires some form of high
energy equipment.
Slugging wrenches and crane
wrenches are dangerous and
thermal tightening can be time
consuming. Hydraulic wrenching
can be expensive, time consuming,
inaccurate and can lead to thread
galling. Hydraulic tensioning also
shares some of these problems and
adds problems with field retrofit.
Because of this, bolts with a
diameter greater than 1 inch
cannot be effectively torqued to
capacity with hand tools.
Achieving proper preload levels
Hydraulic
Tensioning
Hydraulic
Wrench
Thermal
Tightening
Crane
Wrench
Sledgehammer
The Simple
Solution:
Low torque for
any size Supernut
®
100,000
Torque Curve for
45,000 psi Bolt Stress
Superbolt
®
Tensioners are designed
as direct replacements for standard
bolting. They can be threaded
onto a new or existing bolt, stud,
threaded rod or shaft. With our
products, bolting is fast, safe,
easy and accurate.
Torque Required
For Standard Nut
50,000
Torque
Required
For Superbolt
®
Torquenut
1
2
3
4
5
6
Thread Diameter (In.)
Beneits:
Only Hand Tools Required
Standard torque wrenches/small
air tools can generate higher bolt
tensions than any other bolting
method available.
Safe To Use
Eliminate common injuries associated
with other bolting methods. Our products
can be used in awkward locations
such as overhead bolts, on top of large
equipment, and also in hazardous
environments such as nuclear power
plants.
Flexing - Adds Elasticity
Superbolt
®
Tensioners add elasticity
to any bolted joint (see page 22).
The joint becomes more resistant to
thermal or dynamic cycles.
Time and Labor Savings
Vast time savings during installation/
removal have been realized. Multiple
workers and air tools can be used for
even faster installation and removal.
Flexing Can Eliminate Bolt Breakage
Flexing removes stress concentrations
in the irst few threads. Precise load
control and reduced thread stress can
eliminate bolt breakage problems.
Accurate Preload
Our products provide precise tightening
control, which is critical for sensitive
applications such as gasketed langes.
Consistent tension from stud to stud is
achieved.
Fits In Restricted Areas
Most applications can utilize standard
Superbolt
®
products. However, specials
can be designed to it a wide variety of
limited space applications.
Holding Power
Superbolt
®
products will not loosen
on properly designed joints when
correctly torqued. Prestressed
tensioners on bolts or studs remain
tight on vibrating, pulsating, or
reciprocating equipment, eliminating
downtime due to bolting.
Tightens In Pure Tension
Thread galling and stud seizure is
eliminated due to tightening in pure
tension. This prevents the dificulties
associated with removing frozen studs.
Economical / Reusable
Superbolt
®
products are simple
mechanical devices which cost
comparatively less than other bolting
methods.
2
Superbolt®, Inc. • www.superbolt.com
Bolting Technology
Takes A Step Forward:
Application Examples:
Superbolt
®
Multi-Jackbolt Tensioners (MJT’s)
eliminate the need for expensive, time consuming
and unsafe bolting methods. Our products
utilize a series of jackbolts
threaded through the main
body of the nut or bolt, to create
large clamping forces.
Jackbolts are
tightened with a hand
torque wrench.
2,500 Ton structural foam injection molding press. Installation
was accomplished in 2 hours using hand tools!
High compressive
strength jackbolts
have a small friction
diameter creating a
high thrust force with
relatively little torque.
A hardened washer
is used to transfer
force while protecting
the lange face and
casing.
The thrust force of
many jackbolts and
the opposite reaction
force of the main bolt
head create a strong
clamping force on the
lange.
16-1/2” split nut on forging press columns.
The thrust force from
the jackbolts creates
an equally strong
reaction force in the
main bolt head.
This lexible disc coupling took 2 men 2-1/2 hours to install,
saving this company 19 man hours!
Torque Comparison:
Superbolt
®
vs. Hydraulic Wrench
Thread
Size
[Inch]
Bolt
Load
[lbs]
Hydraulic
wrench torque
for standard
Nut
[lb•ft]
716
2,173
5,160
18,925
47,497
74,214
106,868
Supernut
®
jackbolt
torque
(MTX series)
[lb•ft]
14
25
57
114
114
189
189
One would need
18,925 ft•lb of
torque to stress a
3” stud to 428,400
lbs using a hex
nut. With a 3” MTX
Supernut
®
, only 114
ft•lbs on each of the
jackbolts is needed
to produce the same
bolt load.
1
1-1/2
2
3
4
5
6
48,600
98,400
175,200
428,400
806,400
1,008,000
1,209,600
Superbolt
®
products are protected by trademark rights and one or more U.S.
patents: RE 33490; 4,846,614; 5,083,889; 6,199,453; 6,381,827; 6,112,396;
6,263,764; other patents pending and corresponding foreign patents.
High pressure steam turbine
inlet lange.
MJT’s on a 1,000 ton
die cast machine.
Superbolt®, Inc. • www.superbolt.com
3
Table of Contents:
The Solution To Bolting Problems
2
Introduction to High Temperature Bolting
22
How Superbolt
®
Tensioners Work
3
Installation and Removal Procedure
27-28
How To Order
5
Application Examples
30-31
H650
Med. temp. Torquenut
®
20
MT
Standard Torquenut
®
For machinery applications.
Replaces standard hex nuts.
CY tensioners can be used on grade 8
bolts and studs with high preload
For extra high loads.
Torquenut
Where limited headroom is available.
6
Can be used on most B7 bolts or
studs without modiications
For bolts or studs at medium
temperature. Features less jackbolts
CY
High strength Torquenut
®
7
H650X
Med. temp. Torquenut
®
with Moly jackbolt lube
20
MTSX
Ultra high strength
8
H650T, H650TX
Med. temp. Torquenut
®
For ambient and medium high temp.
applications where space is limited
For high temp. applications
where limited space is available
21
SJX
Compact Jamnut
9
H1215
High temp. Torquenut
®
23
Corrosion resistant
H1216
High temp. Torquenut
®
SMX
Mill Motor Nut
For coupling and brake wheels on
600 and 800 series Mill Motors
For direct replacement of std.
AN series bearing locknuts
For applications where jackbolts need
to be protected from damage
OEM quality studs from all materials.
Rolled threads to 6” dia.
To replace itted bolts for large
machines such as turbine couplings
For reciprocating compressor
crosshead connection.
Low torque method to tighten piston to
piston rods on all types of cylinders
Std. bolt type tensioner used
mostly in Grade 5 and B7 applications
High strength bolt type tensioner used
in demanding applications (Grade 8)
The worlds strongest bolts
made from exotic materials
Bolt type tensioners that it in a std.
counterbore of socket head capscrews
9
23
For high temp. applications
where adequate space is available
NI
Bearing Locknut
10
Corrosion resistant
H1218
Stainless Steel Torquenut
®
Corrosion resistant
High Temp. Bolting System
Reduced diameter inconel
studs at high prestress
23
MTA
Armored Torquenut
®
11
For food, corrosion, nonmagnetic
applications and high temperatures
STUDS
Studs
EB
Radial Expansion Bolts
12
24
Valves, steam langes,
steam turbines
13
Nuclear Series
Approved nuclear materials
25
Valves, pumps, heaters,
langes, manways
Various naval and
salt water applications
CN
Crosshead Jamnuts
14
Monel Series
Approved marine
and navy materials
25
SP
Piston Endnuts
15
SB8
Standard Torquebolts
®
16
Corrosion Protection
Various platings
available
Thrust Collars and
Specials
wet applications or
chemical service
25
SB12
High strength Torquebolts
®
17
26
SBU
High Strength Ultrabolts
17
Tools
Commercial and
custom sockets
29
Custom sockets for higher
torque values
SSJX
Torquebolts
®
with
set screws
SX8
Flexnuts
18
Lube
JL-G (Graphite Lube)
JL-M (Moly Lube)
29
For std. and high temp lube.
For low torque on large jackbolts.
These nuts relieve the stress
concentration on high strength bolts
Designed for use at very high
stress levels
19
Caps
Plastic Caps, Metal Caps
N/A
Low cost plastic, avail. for
most sizes. Metal caps designed
and made to order.
SX12
High strength Flexnuts
19
*
For low temperature service, additional material testing and certiication may be required.
4
Superbolt®, Inc. • www.superbolt.com
How To Order:
EXAMPLE
/ w *
N
H
Product series prei
0 T
5
1
0 0
8
Catalog number
format
Bolt/Stud Diameter
Optional
Electroless
Nickel
Plating
TPI
or
Pitch
Includes
Hardened
Washer
All standard products have a
catalog number which conforms
to the format above. Determine
the diameter of your bolt or
stud and the thread pitch as
described below, and choose
the product series that matches
your size, temperature and
material requirements. When
ordering Torquebolts
®
the length
under the head must also be
speciied. Please account for
washer thickness.
To place an order, please review variables for product selection and call or e-mail us.
Our sales engineers will be happy to discuss the details of your application.
Basic variables for product selection:
• Required bolt load or nut torque
• Temperature
• Space restrictions?
• Corrosion protection needed?
• Materials of mating components
Examples:
Order Part No.
For 2-3/4” 8 tpi A193-B7 stud up to 650°F
H650-275-8/w
For 1-3/8” 6 tpi high strength stud
MT-137-6/w
For 56 mm, 5.5 mm pitch high strength stud
MT-M56-5.5/w
Nut for a 3-1/4” 4 tpi stud in corrosive atmosphere
(with optional electroless nickel plating)
MT-325-4/w*N
Torquebolt for a 2-1/2” 4 tpi for 450°F service,
8” length under head.
SB8-250-4x8.00/w
How to measure
and determine
thread pitch.
Diameter
Inches
NC
TPI
NF
TPI
Other
TPI
Diameter
NC
Other
Diameter
Coarse
Other
Inches
TPI
TPI
mm
Pitch
Pitch
mm
mm
5/8
3/4
7/8
1
1-1/8
1-1/4
1-3/8
1-1/2
1-5/8
1-3/4
1-7/8
2
2-1/8
2-1/4
2-1/2
11
10
9
8
7
7
6
6
-
5
-
4-1/2
-
4-1/2
4
18
16
14
12
12
12
12
12
-
12
-
12
-
12
12
-
-
-
14
8
8
8
8
5.5,6,8,12
6, 8,10
5,6,8,10,12
6, 8,10
6, 8,12
6, 8,10
6, 8,10
2-3/4
4
6, 8, 10, 12
M20
2.5
1,1.5,2
3
4
6, 8, 10, 12
M24
3
1,1.5,2
Ordering Superbolt
®
products
requires correct determination
of the thread pitch. This is
the most common reason for
ordering errors. The table at
the right lists common Threads
Per Inch counts for various
diameters. If your count is not
shown, recheck, then contact
Superbolt
®
for assistance
(412-279-1149).
3-1/4
4
6, 8, 12
M27
3
1,1.5,2
3-1/2
4
6, 8, 12
M30
3.5
1,1.5,2
3-3/4
4
6, 8, 12
M33
3.5 1.5,2,3,4
4
4
6, 8, 12
M36
4
1.5,2,3,4
4-1/4
-
4, 6, 8, 12
M39
4
1.5,2,3,4
4-1/2
-
4, 6, 8, 12
M42
4.5 1.5,2,3,4
4-3/4
-
4, 6, 8, 12
M45
4.5 1.5,2,3,4
5
-
4, 6, 8, 12
M48
5
1.5,2,3,4
5-1/4
-
4, 6, 8, 12
M52
5
1.5,2,3,4
5-1/2
-
4, 6, 8, 12
M56
5.5 1.5,2,3,4
5-3/4
-
4, 6, 8, 12
M60
5.5 1.5,2,3,4
6
-
3,4,6,8,12
M64
6
1.5,2,3,4
M72
6
1.5,2,3,4
M80
6
1.5,2,3,4
M90
6
2,3,4,8
M100
6
2,3,4,8
M110
6
2,3,4,8
Notes for applications engineering with Superbolt
®
products.
The torque and preload (bolt load) values
given in the catalog tables are the “standard”
values for common uses. If your application
requires a higher or lower load, usually the
standard product torque can be increased
or decreased proportionally. However, you
should check with a Superbolt
®
engineer
prior to increases beyond rated bolt load.
The values listed in this catalog were
obtained by factory tests. They are valid
for new products as shipped. Repeated
use, exposure to extreme heat, washing
in solvents, or ield lubrication can cause
variations in values. Designers should
use the same safety factors as for
standard fasteners.
Superbolt®, Inc. • www.superbolt.com
5
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