G-Force Nova GFN8500 IR380 Shank

Hammer Specifications - G-Force Nova IR380 Shank

Features:

No foot valve required
Easy to service
Special heat-treated alloy piston for long life, Rockwell hardness 60
Minimum loss of performance when injecting foam or water

Item #	Description	Part #
1	Back Head	GFN8501
2	Back Head O-Ring	GFN8502
3	Back Head Washer	GFN8503
4	Air Check Valve	GFN8504
5	Air Check Valve Spring	GFN8505
6	Air Guide Washer	GFN8506
7	Make-up Rubber	GFN8507
8	Air Guide	GFN8508
9	Air Guide Plug (Choke)	GFN8509
10	Air Guide O-ring	GFN8510
11	Air Distributor	GFN8511
12	Air Distributor O-ring	GFN8512
13	Cylinder	GFN8513
14	Wear Sleeve	GFN8514
15	Piston	GFNR8515
16	Piston Stop Ring (Buffering)	GFN8516
17	Bit Bearing	GFNR8517
18	Bit Bearing O-Ring	GFN8518
19	Bit Retainer	GFNR8519
20	Bit Retainer O-Ring	GFN8520
21	Chuck Washer	GFN8521
22	Chuck (Drive Sub)	GFNR8522

Specifications

Length (w/o drill bit)	56.1"
Outside Diameter	7.25"
Weight (w/o bit)	440.92 lbs.
Cylinder Bore	5.925"
Piston O.D.	5.92"
Piston Stroke	4.52"
Piston Weight	92.6 lbs.
Hole Sizes	7 7/8" - 10"
Air Pressure Consumption	150 psi - 350 psi
Wrench Size	A/F 5.512"
Connection	Std. 4 1/2" API Reg Pin

Air Consumption Chart

PSI	150	200	250	300	350	400
CFM with blank choke	445	650	850	1,045	1,240	-
with 1/8" choke	-	-	-	-	-	-
with 1/4" choke	-	-	-	-	-	-

All Hammers come Fitted with Blank Choke located in the Air Check Valve

Click here to download brochure

Hammer Service Log

Wear Sleeve / Piston Clearance

Part	New Dimension		Discard Clearance
Wear Sleeve	A	5.93"	greater than or equal to 0.010"
Piston OD	B	5.92"	greater than or equal to 0.010"

Inner Cylinder / Piston Clearance

Part	New Dimension		Discard Clearance
Cylinder ID	C	5.393"	greater than or equal to 0.010"
Piston OD	D	5.388"	greater than or equal to 0.010"

Distributor Probe / Piston ID Clearance

Part	New Dimension		Discard Clearance
Distributor Probe OD	F	1.84"	greater than or equal to 0.010"
Piston ID	E	1.85"	greater than or equal to 0.010"

External Wear

Description	Wear Limit
Wear Sleeve Discard Dimension	6.6"
NOTE: Chuck should be replaced when wear transfers to wear sleeve.

Lubrication

G-Force Series Hammers are precision-made tools and should be treated as such. Only the highest quality lubrication should be used and a constant flow of oil must be maintained at all times. Recommended lubrication amount 1/3 Pint per 100 cfm per hour.

Recommended Grades of Lubricant

ESSO
MATEX
CASTROL
SHELL
MOBILE

AROX EP 150
RDO 302
RD OIL DP 100
AIR TOOL OIL 2 A 320
ALMO NO. 5

Heavy duty oil is recommended for all year-round use, in particular where air supply to the hammer is at high temperature. If lighter grade oil is required due to very low ambient temperatures, amount of oil being used should be increased by 30 percent.

Recommended Pull Down

Minimum @ 100 psi - 2500 lbs.

Maximum @ 350 psi - 6500 lbs.

Missile Warranty will be voided by the following:

Welding on Wear Sleeve.
Heating Case with a Torch.
Gripping Wrenches across Threads.
Hammering on Casing.