SPINDLE SPEEDS

Five spindle speeds of 620, 1100, 1720, 2340 and 3100 RPM are available. The highest speed is obtained when the belt is on the largest step of the motor pulley and the smallest step of the spindle pulley, as shown in Fig. 28. Fig. 28, illustrates which steps the pulleys the belt must be placed to obtain the five speeds available.

CHANGING SPEEDS AND ADJUSTING BELT TENSION

1.Disconnect the tool from the power source.

2.Lift up the belt and pulley guard (A) Fig. 29.

3.Release belt tension by loosening tension lock knob

(B) Fig. 29, and pivoting the motor toward the front of the drill press, as shown.

4.While holding the motor toward the front of the drill press head, position the belt (C) on the desired steps of the motor and spindle pulleys, as shown in Fig. 29. A belt positioning chart (D) is provided on the inside top cover of the drill press for your convenience.

5.After the belt is positioned on the desired steps of the motor and spindle pulleys, pivot motor away from the drill press head until the belt is properly tensioned and tighten tension lock knob (B) Fig. 30. The belt should be just tight enough to prevent slipping. Excessive tension will reduce the life of the belt, pulleys and bearings. Correct tension is obtained when the belt

(C) can be flexed about one inch out of the line midway between the pulleys using light finger pressure.

SPINDLEMOTOR

3100

2340

1720

1100

620

Fig. 28

A

D

C

B

Fig. 29

C

B

Fig. 30

DRILLING HOLES TO DEPTH

Where a number of holes are to be drilled to exactly the same depth, a depth stop is provided in the pinion shaft housing and is used as follows:

1.Loosen lock screw (A) Fig. 31, and rotate housing (B) until the pointer (C) lines up with the desired depth indicated on scale (D). Then tighten lock screw (A).

2.All holes will then be drilled to the exact depth as indicated on scale (D) Fig. 31. NOTE: Scale (D) is calibrated in both inches and millimeters.

B

D

CA

Fig. 31

12

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Delta 11-990C instruction manual Spindle Speeds, Changing Speeds and Adjusting Belt Tension, Drilling Holes to Depth
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11-990C specifications

The Delta 11-990C is a powerful and versatile tool in the landscape of woodworking and home improvement projects. Renowned for its exceptional performance and innovative features, this portable table saw is designed to meet the needs of both amateur and professional woodworkers alike.

One of the standout features of the Delta 11-990C is its robust 15-amp motor, which delivers an impressive 4,800 RPM. This power allows users to cut through various types of wood materials with ease, from softwoods to hardwoods. The saw's 10-inch blade ensures deep cuts, making it suitable for a wide range of applications, including dados and rip cuts.

The design of the Delta 11-990C incorporates a sturdy cast-iron table that provides a durable and stable work surface. This large table area enhances precision when making intricate cuts, and its smooth surface helps minimize friction, allowing for better control over the material being cut. Additionally, the saw includes an adjustable extension wing, which offers extra support for larger workpieces.

One of the key technologies featured in the Delta 11-990C is the Quick Release Blade Guard. This safety feature allows for easy access to the blade for maintenance and adjustments while ensuring maximum protection during operation. It also comes equipped with a riving knife, which reduces the risk of kickback, contributing to a safer woodworking experience.

Another notable aspect of the Delta 11-990C is its easy-to-use fence system. The T-square fence design offers accurate and repeatable cuts, enabling users to work efficiently. The fence can be adjusted quickly and locks securely in place, guaranteeing precision for both rip and crosscut operations.

Moreover, the portability of the Delta 11-990C makes it an ideal choice for contractors and hobbyists who may need to move their worksite frequently. The saw features onboard storage for accessories, such as the miter gauge and push stick, ensuring that all necessary tools are within reach.

Overall, the Delta 11-990C combines power, precision, and safety features, making it one of the most sought-after table saws on the market. Whether for home improvement tasks or professional woodworking projects, it stands out as an essential tool for those seeking quality and reliability in their craftsmanship.
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