Haden BMX Mk 3 Frame and Fork Components Leaflet (Undated) — Lugs, Fork Crowns, Dropouts and Fittings for the BMX Frame

One side of Haden’s leaflet for its BMX Mk 3 frame and fork components: the lugs, fork crown and blades, dropouts and fittings drawn and named, for Reynolds or ERW tube. The parts list printed on the back is not in the scan. No year is printed.

— Page 1 —
HADEN
DETAILED DRAWING AVAILABLE ON REQUEST
SEAT LUG LS1
1⅛”.
4
TOP HEAD LUG GTN 77K
1¼” x 1″ x 77°.
1
HEAD GUSSET PLATE
Steel Pressing 0.128″ thick.
Alternative piercings are available.
6
LOOP LUG L721K
1⅛” x 1″ x 72°.
3
BOTTOM HEAD LUG BN 77K
1¼” x 1″ x 77°.
(Identical to Top Lug).
2
STEEL BOTTOM BRACKET
HBS8278
3″ wide for balloon tyres.
Screwed 1.370″ x 24TPI LH/RH.
1″ x 1⅛” x ¾”.
5
REAR FORK END LH/RH
Steel Pressing 0.128″ thick.
Supplied in pairs LH/RH.
7
BMX Mk 3
Frame and Fork Components
FORK STEERING COLUMN
Ø 1″ x 6½” long
Butted Steel Tube.
Screwed 1¼” down
thread 1″ x 24 TPI BSC.
Other lengths can be
supplied to customers’
requirements.
8
BMX FORK CROWN
Whiteheart Malleable Casting. Specially
designed with reinforced core. Precision
machined. To suit blade types A and B.
Registered Design.
9
TYPE A
10
BMX FORK BLADE TYPE A
Supplied in pairs LH/RH. Trapped, pierced, slotted.
Ø ⅞” x 16 swg Steel Tube.
Pierced to suit safety tab washer.
To suit cast crown illustrated above.
Registered Design.
FORK STEERING COLUMN
Ø 1″ x 6½” long
Butted Steel Tube.
Screwed 1¼” down
thread 1″ x 24 TPI BSC.
Other lengths can be
supplied to customers’
requirements.
8
BMX FORK CROWN
Whiteheart Malleable Casting. Specially
designed with reinforced core. Precision
machined. To suit blade types A and B.
Registered Design.
9
TYPE B
12
11
12
13
BMX FORK BLADE TYPE B
Plain Tube. Ø ⅞” x 16 swg tube can be supplied from:
ERW BS1717 Tube, Reynolds SMS Tube or Reynolds 531
Tube.
BMX FRONT FORK END
Steel Pressing 0.128″ thick. Pierced to suit safety tab
washer.
BMX FORK BLADE END PLUG
Steel Pressing 0.048″ thick. Push fit into end of tube.
Components illustrated are not to scale.
For Component Parts List see over

[A two-panel leaflet spread titled “BMX Mk 3 Frame and Fork Components” from Haden, with numbered drawings of head lugs, a seat lug, a gusset plate, a bottom bracket, fork ends, fork crown and fork blades types A and B. A blue BMX rider is printed at the top center and four binder holes show along the outer edges.]