The heavily ribbed and cored frame is cast in four pieces. The two inclines and bed are bolted to a wide stance floor base. A 6" sheet metal dust spout is provided for connection to a central dust collection system. The base is placed so as not to obstruct the feet of the operator, permitting them to work in a comfortable, natural position.

Inclines are placed at such an angle that they can be raised or lowered without interfering with the cutthead. The inclines are operated by handwheels at the ends of the machine.

The cutterhead is made from high-carbon steel that is accurately machined and dynamically balanced. Four-knife heads are standard on all direct motor drive and belt-driven machines. Three-knife belt drive heads are available as an option. All cutting circles are 4-1/4". The knives are adjusted by integral, micrometer-type knife raising screws and held in place by fitted wedges. The cutterhead is mounted in a carefully machined, one-piece, cast-iron yoke. The yoke is carefully fitted into heavy supports on the frame of the machine.

Both the direct motor and belt drive machines are equipped with heavy-duty, sealed-for-life, precision ball bearings.

The overall length of the tables on all machines is 6'2". Both tables can be drawn away from the cutterhead on a level independent of the inclines, leaving an opening around the cylinder head for adjustment of knives, etc. The rear table is provided with a rabbeting groove and the infeed table is mounted on planed inclines and are adjustable for precisely gauging the depth of cut. The tables are without the use of adjusting gibs. They cannot come out of alignment. No adjusting screws or gibs are needed to keep the tables in alignment.

Knife grinders are available for all medium duty jointers, features include 1/2 HP motor, fast helix rail screw, and positive stop indexing for heel grinding.

Standard equipment on Northfield medium duty jointers are the front and rear guards. The front guard is the swing out type with spring tension. The shield is made of aluminum. The rear guard is attached to the fence and moves with it, keeping the cutterhead in back of the fence protected at all times. A cutterhead hand brake is also standard. A switch that stops the power upon application of the hand brake can alo be ordered as an option.

On all medium duty machines a quickly adjustable fence which tilts 45 degrees to the right is furnished. Fence angularity is accomplished through a degree handle with locking knob, with a positive stop provided at the 90 degrees postion. The fence can be placed at an angle to the head for shear cutting.

8" and 12" machines are equipped with 3HP, 3600 RPM, totally-enclosed, fan-cooled motors. The front plate of the motor is cast as part of the cylinder yoke. 5 and 7-1/2 HP motors are available as optional extras on all models. The motor rotor is mounted on the cylinder head shaft which is extended through the motor. This design integrates the cylinder head bearings and motoras a complete unit. The motor is controlled by a magnetic starter with overload and low voltage protection and 110 volt at push button.

Jointers can be furnished with a belt drive if desired. Cutterhead speeds to 4,500 RPM are available.

Specifications:
Length of Knives: 12"
Knife Size: 12" x 1-1/4" x 1/8"
Knives per Head, DMD: 4
Knives per Head, Belt drive: 4
Cutting circle: 4-1/4"
Overall Length of Tables: 6'2"
Height of Tables from Floor: 33"
Fence Size: 45" x 5-1/4"
Fence Tilts: 45 degrees
Maximum Rabbet depth: 9/16"
Drives Available: Direct motor & V-Belt
Motor Size: 3 HP DMD
Cutterhead RPM, V-Belt*: 4500 RPM *
Cutterhead RPM, DMD: 3600 RPM
Optional Motor Size: 5 & 7-1/2 HP
Net Weight: 1100 lbs
Domestic Shipping Weight: 1300 lbs
Export Shipping Weigh: 1500 lbs
Cubic Measure: 84 cu. ft.
Floor space: 34" x 74"

*Or to customer's specifications

Equipment-
Each Machine is furnished complete with one set of high-speed steel knives, cutting depth gauge, necessary wrenches, 6" dust chute, maintenance and parts manual, hand brake, 110 volt at push button. 208, 230/460, 575, 3 phase 60 cycle motors are standard.