ASTM F765-93(1998)
(Specification)Standard Specification for Wildcats, Ship Anchor Chain
Standard Specification for Wildcats, Ship Anchor Chain
SCOPE
1.1 This specification covers wildcats as used in windlasses to haul in and pay out anchor chain on board ships. An associated chain stopper is used to secure the chain while the ship is anchored, or the anchor is housed.
1.2 Wildcats are of the five whelp type for use with stud link anchor chain conforming to the American Bureau of Shipping Grades 1, 2, and 3. Wildcat dimensions are provided for chains in integral 1/8-in. (3-mm) steps, ranging in size from 3/4 to 4 1/8 in. (19 to 104 mm). Wildcat dimensions for chains in intermediate 1/16-in. (1.5-mm) steps are not provided, but wildcats in these sizes are permitted within the scope of this specification.
1.3 Wildcats are configured to pass detachable links oriented parallel or perpendicular to the wildcat shaft centerline.
1.4 The values stated in inch-pound units are to be regarded as the standard. This specification is for use with anchor chain that is measured in inch-pound units.
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An American National Standard
Designation: F 765 – 93 (Reapproved 1998)
Standard Specification for
Wildcats, Ship Anchor Chain
This standard is issued under the fixed designation F 765; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3. Classification
1.1 This specification covers wildcats as used in windlasses 3.1 The size of the wildcat is identified by the chain size.
to haul in and pay out anchor chain on board ships. An 3.2 Wildcats are furnished in four types as follows:
associated chain stopper is used to secure the chain while the 3.2.1 Type I—Fabricated from structural steel plate for
ship is anchored, or the anchor is housed. flanges, hubs, whelps, and chain pockets, joined by electric
1.2 Wildcatsareofthefivewhelptypeforusewithstudlink welding. Surface hardness is approximately 150 HB.
anchor chain conforming to theAmerican Bureau of Shipping 3.2.2 Type II—Fabricated from structural steel plate for
Grades1,2,and3.Wildcatdimensionsareprovidedforchains flanges, hubs, and chain pockets; and high-strength steel
1 3 1
in integral ⁄8-in. (3-mm) steps, ranging in size from ⁄4 to 4 ⁄8 castings for whelps, joined by electric welding. Surface hard-
in. (19 to 104 mm). Wildcat dimensions for chains in interme- nessisapproximately150HBforflangesandhubsand300HB
diate ⁄16-in. (1.5-mm) steps are not provided, but wildcats in for whelps.
these sizes are permitted within the scope of this specification. 3.2.3 Type III—Cast from medium-strength carbon steel
1.3 Wildcats are configured to pass detachable links ori- castings to provide a surface hardness of approximately 150
ented parallel or perpendicular to the wildcat shaft centerline. HB.
1.4 The values stated in inch-pound units are to be regarded 3.2.4 Type IV—Cast from high-strength steel castings to
as the standard. This specification is for use with anchor chain provide a surface hardness of approximately 300 HB.
that is measured in inch-pound units.
4. Descriptions of Terms
2. Referenced Documents
4.1 chain groove—circumferential groove at the chain cen-
2.1 ASTM Standards: terline to provide clearance for links passing normal to the
A27/A27M Specification for Steel Castings, Carbon, for wildcat shaft centerline.
General Application 4.2 chain pockets—recessesbetweentheflangesandwhelps
A36/A36M Specification for Structural Steel into which links with flat side orientated parallel to the wildcat
A 148/A 148M Specification for Steel Castings, High- shaft centerling lay.
Strength, for Structural Purposes 4.3 detachable link—a “C” shaped link, closed by means of
E10 Test Method for Brinell Hardness of Metallic Materi- apairofclosingpiecesandataperpin,andusedtojoinanchor
als chain lengths and appendages into a continuous length aboard
2.2 Other Documents: ship.
American Bureau of Shipping, Rules for Building and 4.4 flanges—circumferential rims on the outside of the
Classing Steel Vessels, Section 43.11 Equipment whelps, chain pockets, and chain groove.
American Welding Society Structural Welding Code, Chap- 4.5 link grip—the inside dimension of a chain link repre-
ter D1.1 senting the effective length of a chain link in an assembled
chain. Generally four times the nominal size of a stud link
anchor chain, see Fig. 1.
This specification is under the jurisdiction ofASTM Committee F25 on Ships
4.6 whelps—protrusions on the inside of the flanges of the
and Marine Technology and is the direct responsibility of Subcommittee F25.03 on
wildcat that resemble gear teeth and of such shape and
Outfitting.
Current edition approved March 15, 1993. Published May 1993. Originally dimensionssoastofollowthepathofthechain,asitentersand
published as F765–82. Last previous edition F765-82.
leaves the wildcat. Faces of protrusions are separated by the
Annual Book of ASTM Standards, Vol 01.02.
chain groove to permit links with the flat side normal to the
Annual Book of ASTM Standards, Vol 01.04.
wildcat shaft centerline to pass, but blocking links with the flat
Annual Book of ASTM Standards, Vol 03.01.
Available from American Bureau of Shipping (ABS), ABS Plaza, 16855
side oriented parallel to the wildcat shaft centerline.
Northchase Dr., Houston, TX 77060.
Available from TheAmerican Welding Society (AWS), 550 NW LeJeune Rd.,
Miami, FL 33126.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 765 – 93 (1998)
FIG. 1 Chain Wrap Test
4.7 wildcat—a rotating member specially contoured to re- tempered. Material for Type IV wildcats shall conform to
ceive assembled chain links and connecting links around the Specification A148/A148M, Grade 150-125, quenched and
circumferenceofthememberandofsuitablestrengthtoimpart
tempered.
motion to the chain when rotated.
6.2 The manufacturer’s name or identification mark, chain
size,andpatternordrawingnumbershallbecastorstampedon
5. Ordering Information
the wildcat, using minimum ⁄4-in. (19-mm) size characters.
5.1 Ordersforwildcatsunderthisspecificationshallinclude
Themarkingshallnotappearonawearingsurfaceandshallbe
the following:
visible on an assembled windlass.
5.1.1 Quantity (number),
5.1.2 Size (chain size),
7. Dimensions
5.1.3 ASTM designation and date of issue,
7.1 Wildcat must be fitted to the sample chain, and detach-
5.1.4 Type (I, II, III, or IV),
ablelink(seeSection9).PrincipaldimensionsofTypesIIIand
5.1.5 Size, grade, and type of chain,
IV wildcats for chains in steps of ⁄8 in. (3 mm) are shown for
5.1.6 Availability of assembled chain and detachable link to
information only in Table 1 and Table 2.
be furnished by the purchaser for test (see Section 9),
5.1.7 As-cast or machined dimensions for wildcat bore, hub
7.2 Dimensions in Table 1 and Table 2 are developed in
width, and outside boss diameter, and
accordance with the following (see also Fig. 2 and Fig. 3):
5.1.8 Marking (shipping).
7.2.1 Bottom of chain pockets are relieved to clear enlarge-
ments occurring at centers of chain links as manufactured.
6. Materials and Manufacture
7.2.2 Each face of the whelp is a partial frustrum of a cone
6.1 Material for Type I wildcats shall conform to Specifi-
developed so that each link whose plane is parallel to the
cation A36/A36M for flanges, hubs, whelps, and chain
wildcat shaft centerline will have end play as noted in Table 1
pockets, joined by electric welding in accordance with AWS,
and Table 2. This end play provides clearance between non-
structural welding code Chapter D1.1. Type I wildcats in sizes
bearing side of whelp and the end of the next following link,
2 in. and larger shall be stress-relieved. Material for Type II
the centerline plane of which is parallel to the axis of shaft.
wildcatsshallconformtoSpecificationA36/A36Mforflanges
7.2.3 The inner surfaces of the chain pockets, that form the
and hubs, and chain pockets, and SpecificationA148/A148M
flanges of the wildcat, are flat surfaces together forming the
for whelps, joined by electric welding in accordance with
frustrums of pentagonal pyramids. The traces of the intersec-
AWS, Structural Welding Code, Chapter D1.1, stress-relieved
tions of these flat surfaces or sides of the frustrums coincide
and heat-treated. Material for Type III wildcats shall conform
to Specification A27/A27M, Grade 70-40, quenched and with the centerline of the whelps.
F 765 – 93 (1998)
TABLE 1 Dimensions in Inches of Types III and IV Wildcats for Chains
Size of RR R R XA B O P S T U V R R End Play
1 2 3 4 5
Chain of Link
3 3 3 3 1 5 15 21 13 3 3 3
⁄4 4.12 4.09 3.00 4.87 2 ⁄8 1 ⁄8 3 ⁄8 ⁄2 1 ⁄16 1 ⁄32 2 ⁄32 ⁄16 ⁄16 21 ⁄8 ⁄4
7 11 1 7 5 13 5 3 7 7 5 1 7
⁄8 4.80 4.77 3.50 5.68 2 ⁄16 1 ⁄2 3 ⁄8 ⁄8 1 ⁄32 1 ⁄8 3 ⁄32 ⁄8 ⁄32 2 ⁄16 1 ⁄2 ⁄8
5 3 3 17 13 1 1 5 3
1 5.49 5.43 4.00 6.49 3 1 ⁄8 4 ⁄8 ⁄4 1 ⁄32 1 ⁄16 3 ⁄2 1 ⁄4 2 ⁄8 1 ⁄4 1
1 1 7 7 3 27 1 31 1 9 1 1
1 ⁄8 6.18 6.12 4.62 7.31 3 ⁄4 1 ⁄8 4 ⁄8 ⁄4 1 ⁄32 2 ⁄8 3 ⁄32 1 ⁄8 ⁄32 32 ⁄16 1 ⁄16
1 1 3 7 3 7 7 1 5 5 1 1
1 ⁄4 6.87 6.81 5.12 8.12 3 ⁄2 25 ⁄8 ⁄8 2 ⁄32 2 ⁄16 4 ⁄16 1 ⁄4 ⁄16 3 ⁄16 2 ⁄2 1 ⁄8
3 3 1 7 7 9 23 7 3 11 5 5 1
1 ⁄8 7.56 7.50 5.62 8.93 3 ⁄4 2 ⁄8 5 ⁄8 ⁄8 2 ⁄32 2 ⁄32 4 ⁄8 1 ⁄8 ⁄32 3 ⁄8 2 ⁄8 1 ⁄8
1 1 1 3 17 1 3 1 3 1
1 ⁄2 8.24 8.18 6.19 9.74 4 ⁄16 2 ⁄4 6 ⁄8 12 ⁄32 3 ⁄16 5 ⁄8 1 ⁄2 ⁄8 43 1 ⁄8
5 3 1 7 1 7 3 27 5 13 5 1 3
1 ⁄8 8.93 8.87 6.75 10.55 4 ⁄8 2 ⁄2 6 ⁄8 1 ⁄8 2 ⁄8 3 ⁄8 5 ⁄32 1 ⁄8 ⁄32 4 ⁄16 3 ⁄4 1 ⁄16
3 11 3 3 1 1 5 1 3 7 5 9 1
1 ⁄4 9.63 9.57 7.31 11.37 4 ⁄16 2 ⁄4 7 ⁄8 1 ⁄8 3 ⁄32 3 ⁄8 6 ⁄4 1 ⁄4 ⁄16 4 ⁄8 3 ⁄16 1 ⁄4
7 7 7 1 1 29 23 7 15 15 13 5
1 ⁄8 10.31 10.25 7.87 12.18 5 2 ⁄8 7 ⁄8 1 ⁄4 3 ⁄4 3 ⁄32 6 ⁄32 1 ⁄8 ⁄32 4 ⁄16 3 ⁄16 1 ⁄16
1 3 1 7 5 1 1 1 7 3
2 10.99 10.93 8.37 12.99 5 ⁄4 38 ⁄8 1 ⁄4 3 ⁄16 4 ⁄32 7 ⁄8 2 ⁄2 5 ⁄4 3 ⁄8 1 ⁄8
1 9 1 7 3 19 15 5 1 17 5 1 7
2 ⁄8 11.68 11.62 8.87 13.80 5 ⁄16 3 ⁄8 8 ⁄8 1 ⁄8 3 ⁄32 4 ⁄32 7 ⁄8 2 ⁄8 ⁄32 5 ⁄8 4 ⁄4 1 ⁄16
1 7 3 1 3 29 3 31 1 9 15 5 1
2 ⁄4 12.37 12.31 9.50 14.62 5 ⁄8 3 ⁄8 9 ⁄4 1 ⁄8 3
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