IMPORTS, INC. GEAR HEAD MILL / DRILL MODEL G1126 INSTRUCTION MANUAL COPYRIGHT © 1994 BY GRIZZLY IMPORTS, INC. WARNING: NO PORTION OF THIS MANUAL MAY BE REPRODUCED IN ANY SHAPE OR FORM WITHOUT THE WRITTEN APPROVAL OF GRIZZLY IMPORTS, INC.
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TABLE OF CONTENTS PAGE I. INTRODUCTION ......................................................................................................................1 II. COMMENTARY ........................................................................................................................1 III. SAFETY RULES FOR ALL TOOLS ........................................................................................2 IV. UNPACKING ................................................................................
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I. INTRODUCTION We are proud to offer the Model G1126 Gear-Head Mill / Drill. The Model G1126 is part of a growing Grizzly family of fine metalworking machinery. When used according to the guidelines described in this manual, you can expect years of trouble-free, enjoyable operation and proof of Grizzly’s commitment to customer satisfaction. The Model G1126 is ideal for use in a small-to-medium sized machine shop or by the serious home craftsman. This mill / drill features a 11/2 H.P.
The specifications, drawings and photographs in this manual represent the Model G1126, as supplied when the manual was prepared. However, owing to Grizzly’s policy of continuous improvement, changes to the Model G1126 may be made at any time with no obligation on the part of Grizzly. The information in this manual has been obtained from sources believed to be reliable and as up-todate as possible.
5. KEEP WORK AREA CLEAN. Cluttered areas and benches invite accidents. 6. AVOID DANGEROUS ENVIRONMENTS. Do not use power tools in damp or wet locations or expose them to rain. Keep your work area well lighted. 7. KEEP CHILDREN AND VISITORS AWAY. All children and visitors should be kept a safe distance away from your work area. 8. MAKE WORKSHOP CHILD-PROOF with padlocks, master switches, or by removing starter keys. 9. DO NOT FORCE TOOL.
22. NEVER LEAVE THE TOOL RUNNING UNATTENDED - TURN POWER OFF. Do not leave the tool until it comes to a full stop. 23. DRUGS, ALCOHOL, MEDICATION. Do not operate the tool under the influence of drugs, alcohol, or any medication. Never operate machinery when overly fatigued. IV. UNPACKING The Model G1126 comes from the factory in a wooden crate. While it is still on its pallet, use a forklift (if available) to move the machine to its permanent location.
VI. CLEAN-UP BEFORE ASSEMBLY All of the unpainted surfaces on this machine – and a few of the painted ones – are coated with a preservative oil, called Cosmolene, which prevents rust and corrosion during shipping. The coating can be removed with paint thinner (mineral spirits) and a good supply of paper towels, although you may find that careful scraping with a putty knife or plastic spatula may be necessary where the coating is particularly thick.
VIII. ELECTRICAL SERVICE REQUIREMENTS The Model G1126 is furnished with a complete electrical package: A 1,720 RPM 11/2 H.P. motor, ONOFF starter switch, FORWARD/REVERSE switch and a cord set. The motor is single phase and can be wired for 110V or 220V. As delivered, the G1126 is ready for 110V operation. If you want 220V operation, the wiring system must be changed for the desired voltage. A. GENERAL The Model G1126 comes with a standard 110V cord and plug.
IX. ASSEMBLY Head Swivel Adjustment Bolts Speed Selectors Column Adjustment Micro Height Adjustment Wheel Power / Direction Switch Spindle Height Adjustment Wheel Quill Return Spring Spindle Height Adjustment Lever Lock Power Feed Side-to-Side Adjustment Handwheel Gib Locks Front-to-Back Adjustment Handwheel Power Feed Stops Figure 2 The Model G1126 is largely pre-assembled at the factory, so very little actual assembly is required. The motor is already mounted and all wiring is in place.
3. When the auto feed and the clamping bracket are secured together, set the assembly on the end of the table, so the gears mesh. The clamping bracket will fit over the top of the table, allowing the bolts on the inboard side of the bracket to be tightened against the table’s cast iron surface. Mark the point on the table’s trough where the mounting bolts contact the table and spot drill to give the mounting bolts a surface to “bite” without slipping on the rough cast surface.
B. HANDWHEELS When the auto-feed mechanism is in place, attach the handwheel to the other end of the leadscrew. The handwheel coupling will lock, like the auto-feed mechanism, with the coupling on the leadscrew. Tighten the setscrew once the handwheel is in place. Attach the other handwheel to the leadscrew at the front of the base casting. When the handwheel locks in place, tighten the setscrew. C.
X. OPERATION The bench-mounted Model G1126 Gear-Head Mill / Drill is a fundamental metalworking machine capable of most standard milling and drilling operations. In order to effectively use the machine, it’s necessary to understand the various adjustments the Model G1126 features. This section deals with the specific adjustments required to operate the Model G1126. A. TABLE The Model G1126’s table rides on precision dovetail ways.
Establishing proper speeds for you power feed is just part of a complex equation that encompasses a number of variables, including; spindle speed, metal hardness, feed rate, cutting depth and cutter type. Because of the complexity of the equations necessary to determine optimum spindle speeds and feed rates, we suggest you obtain one of many good machinist’s guides on the market.
D. SPINDLE SPEED The Model G1126 features an internally-geared head which offers six speeds, both in forward and reverse. Speed selection levers are located on the front of the mill head. See the chart below for specific spindle speeds in each gear range. Gear Ranges – Model G1126 Levers L1 L2 L3 H1 H2 H3 Spindle RPM 60 130 230 450 800 1500 Establishing proper spindle speed is just part of the same complex equation that determines power feed rates.
F. SPINDLE HEIGHT The Model G1126 uses rack-and-pinion gearing to control spindle height adjustment. The operator has two options for adjustment – a 3-handled downfeed control and a handwheel-operated micro adjustment control. See Figure 9. To operate the micro-adjustment handwheel, tighten the locking knob on the 3-handled downfeed control. Once locked, the adjustment of spindle height will be transferred to the handwheel.
H. HEAD ROTATION The milling head on the Model G1126 is designed to swing up to 90° either left or right at the mill head, enabling it to perform tasks such as angled drilling or horizontal slotting. To rotate the head: 1. Loosen the lock nuts on either side of the milling head. See Figure 11. NOTE: Make sure to provide support for the milling head so it doesn’t unexpectedly rotate on its own. Always maintain control of the milling head. 2.
on the adjuster midway along the leadscrew. The longitudinal leadscrew adjuster can be tightened with a long Allen wrench reached under the table. Once again, the setscrew in the tension adjuster is located just above the longitudinal leadscrew. These adjusters may require you to fabricate extensions for your hex wrenches. Make adjustments in small increments. Over-adjustment can add unnecessary wear to both the leadscrews and the adjusters. XI.
XIII. MACHINE DATA GRIZZLY MODEL G1126 GEAR-HEAD MILL / DRILL Design Type ..................................................................................................................Bench Model Overall Dimensions: Height ....................................................................................................................................521/2" Length....................................................................................................................................
XIV. WARRANTY AND RETURNS LIMITED WARRANTY Grizzly Imports, Inc. warrants every product it sells for a period of one year on all parts and one year on all electric motors to the original purchaser from the date of purchase. This warranty does not apply to defects due directly or indirectly to misuse, abuse, negligence, accidents, repairs or alterations or lack of maintenance.
XV. MODEL G1126 PARTS DIAGRAMS A.
B.
XVI. MODEL G1126 MILL / DRILL PARTS LIST Ref. # Qty. Description Ref. # Qty.
Ref. # Qty. Description Ref. # Qty.