SD Yali Rock Tools LLP

Hammer to Drill a hole of dia120 - 140 mm (4 3/4”–51/2”).
FDS47DI is a valve less type hammer designed for high performance at low operating air pressures.
D4 bit has a strong robust design to withstand heavy duty application and it does not use foot valves which reduces the possibility of hammer failure.
FDS47DI Hammer maximizes energy output and reduces service requirements.
Wear Sleeve is not reversible.
Single Start threads on Top sub and Three start thread on Drive sub ensure easy coupling/ uncoupling of hammer.
All critical internal components are heat treated under strict control to maximize tool longevity.
An overall cost-effective and user friendly tool for use in the most demanding conditions.

S. No.	NAME OF ITEM	QTY	PART NO.
1	TOP SUB (2 3/8 API REG PIN)	1 NO	15-4F4700-23ARM
2	CHECK VALVE	1 NO	19-24109R
3	SPRING	1 NO	17-220610
4	BUFFER RING	1 NO	27-080610
5	TOP VALVE	1 NO	25-4F4700
6	CONTROL TUBE HEAD	1 NO	10-4F4700
7	TUBE	1 NO	11-4F4703
8	HEAD BUFFER RING	1NO	27-060405/A
9	C/TUBE LOCK PIN	1 NO	39-11085A
10	PISTON	1 NO	52-4F4703
11	WEAR SLEEVE	1 NO	45-4F4700
12	PISTON RETAINER RING	1 NO	89-080430
13	GUIDE BUSH	1 NO	65-4F4702
14	“O” RING GUIDE BUSH	2 NO	37-07504H
15	BIT RETAINER RING	1 NO	99-080515
16	“O” RING FOR BIT RETAINER RING	1 NO	37-06203H/A
17	DRIVE SUB	1 NO	75-4F4700
	SEAL KIT (PRT NO 3,4,8,14 & 16)	1 SET	4F4700DIK
	HAMMER ASSEMBLY	1 NO	34-4F4704DI-23ARMS

S. No.	DESCRIPTION	UNIT	DIMENSION
1	HAMMER LENGTH W/O BIT	mm	980.0
2	HAMMER OUTSIDE DIA	mm	107.0
3	HAMMER WEIGHT	kg	44.5
4	CYLINDER BORE	mm	88.0
5	PISTON STROKE	mm	90.0 (approx.)
6	PISTON WEIGHT	kg	9.40
7	HOLE SIZES	mm	120-140
8	WRENCH SIZE A/F	mm	A/F 74.5 /W-40.0
9	SUITABLE SHANK	-----	D4

FDS47DI Hammer