Screw Blower Info/Repairs/Upgrades

PSI	Cu.In/ Rev	driven rotor lobe thickness	Short Shaft	Long Shaft	Rotors (Male)
200C	385		X		Cast	no longer produced
200H	385		X		High speed/ Laminated	no longer produced
206B	422	.762″	X		High speed/ Laminated	no longer produced
			X		Billet	no longer produced
210C	476	.483″ -.485″		X	Billet
206D	422	.594″ -.596″	X		High speed/ Laminated	no longer produced
				X	High speed/ Laminated
TAD – PSI “D” 422 cu.in. x 2.15 or 115% = 907.3 TAFC – PSI “D” 422 cu.in. x 2.25 or 125% = 949.6
206B case – 15.75″ length, 10.2 height, rotor 13″, front shaft 3 1/8″ 206D case – 17″ length, 10.3 height, rotor 2″, front shaft 4.5″ long shaft (3 1/8 Short)
Use a 0W-20 full synthetic oil. Fill gearcase with the blower on a flat level surface until oil starts to run out the lowest ( 6 o’clock ) snout mounting hole, DO NOT use the sight-glass. The sight glass is there for oil condition / inspection ONLY.
Whipple
A980	601
R980	601
305R	305

Weld Replace Inlet

Note : long Double Bearing Shafts

Quick Removable inspection – Lubing top cover
Tight blowers Must be lubed every time it is started

Short Shaft Info

short shaft single bearing Case

Long shaft double bearing Case

and of course you can get a billet version.

PSI Delamination –
Male rotor is made from many small sheets glued together and will move if stressed enough