Spaenaur

D
Disc Springs
Rondelles à ressort “Belleville”
SP/SSP Series
STEEL AND STAINLESS STEEL
for HEAVY BOLTED
SECTIONS
Materials: High-grade SPRING STEEL, in self colour or
phosphate finish, our option. 17-7PH STAINLESS STEEL
For INCH Bolt Sizes
• ELECTRICAL INDUSTRY APPLICATIONS
Bus Bar Joints • Transformers
• AUTOMOTIVE
• FARM IMPLEMENTS
Inch
Pouces
This series of Disc Springs has been specifically designed
for heavy bolted sections, such as those used in electrical
industries - on bus bar applications, transformers, etc.
They are widely used to compensate for developed
looseness due to thermal expansion of bolted sections.
These conical spring washers are not as accurately formed
as our AI series, which are generally used for lighter loads
and more predictable load/deflection characteristics.
SP Disc Springs are made of high quality spring steel, heat
treated to Rockwell C43-50. 17-7PH stainless steel is heat
treated to Rockwell hardness C40-48.
Can be finished “to order” in Mechanical Zinc Plating.
* Prefix Cross-Ref. Part No. with an SP for Steel and SSP for Stainless Steel.
*
NOMINAL INCH DIMENSIONS 3)
SPAENAUR No. Cross-Ref. BOLT Load Weight
STAINLESS SP/SSP SIZE 1) 2) Flat per M
STEEL STEEL Part No. Inch D d t O.H. O.H. (in lbs.) (in lbs.)
— 680-852 52203 — .197 .087 .012 .020 .016 65 0.08
680-203 680-853 62704 — .236 .106 .016 .026 .020 146 0.16
680-205 680-854 73205 1/8" #5 .276 .126 .020 .030 .025 210 0.26
680-207 680-855 83705 #6 .315 .146 .020 .031 .027 176 0.34
680-209 680-856 94308 5/32" #8 .354 .169 .031 .043 .037 590 0.68
680-211 680-804 115310 3/16" #10 .433 .209 .039 .055 .047 1070 1.3
680-213 680-805 146412 1/4" .551 .252 .050 .067 .056 1390 2.5
680-215 680-859 177415 — .669 .291 .059 .079 .070 1800 4.8
680-217 680-860 188420 5/16" .709 .331 .078 .102 .088 4755 6.9
680-219 680-861 218425 5/16" .827 .331 .098 .118 .108 5345 12.5
680-221 680-802 231120 3/8" .906 .413 .078 .106 .094 3200 11.4
680-223 680-862 241130 3/8" .945 .413 .118 .146 .130 8000 18.9
680-225 680-863 291325 1/2" 1.142 .512 .098 .130 .116 4700 22.9
680-227 680-864 321335 1/2" 1.260 .512 .138 .169 .156 9900 40.0
680-229 680-865 351530 9/16" 1.378 .591 .125 .157 .141 6500 40.7
680-231 680-866 391540 9/16" 1.535 .591 .157 .197 .181 12000 70.0
▲680-233 680-867 391735 5/8" 1.535 .669 .138 .185 .162 10000 58.5
†680-235 680-868 421740 5/8" 1.654 .669 .157 .204 .201 13000 90.0
680-237 680-869 471950 — 1.850 .748 .197 .244 .222 20000 125.0
680-239 680-870 522160 3/4" 2.047 .827 .236 .287 .246 31000 169.0
680-245 — 702870 1" 2.756 1.102 .276 .362 .317 46000 392.0
t
h
d
D
IMPORTANT NOTE: SP Series Disc Springs
are not pre-stressed. They are designed for
static bolted applications only. See Series AM
or AI as shown on other pages, for other
applications.
Load Values for Stainless Steel approx.
95% of Spring Steel values shown.
1) When delivered.
2) After first loading.
3) Load ± 20% of
nominal shown.
Note: Values for Load at
Flat shown in the
table are computed.
O.H.
A typical application of
SP/SSP Series
Disc Springs
CATALOG 13
D52
20 Feb 04
▲680-233MZ Mechanical Zinc
†680-235MZ Mechanical Zinc
See Price List for Unit
Package Quantity.