The heavy ribbed and cored frame is cast in three pieces. The two inclines and bed are bolted to legs which are set to provide a wide, three point floor spread. Perfect alignment is insured at all times by the rocker base feature on the front leg. The legs are so places as not to obstruct the feet of the operator permitting him 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 cutterhead. The outfeed incline is operated by a handwheel at the end of the machine. The infeed incline is adjustable and operated by a large wood spoked ships wheel on the side of the machine and within easy reach of the operator.

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 Patternmaker machines. All cutting circles are 4-1/4" excepth the 24" machine which is 4-1/2". 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 the belt drive machines are equipped with heavy-duty, sealed-for-life, precision ball bearings.

The overall length of the tables on all machines is 8 feet. Both tables can be drawn away from the cutterhead on a level independent of the inclines leaving on opening around the cylinder head for adjustment of knives, etc. The rear table is provided with a rabbetting groove and the infeed table is equipped with a rabbetting arm. Both tables are of the box form construction widely used in quality machine tools. this type of construction makes a very rigid table which cannot warp under any condition. The tables are equipped with removable steel lips.

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

Standard equipment on Northfield Heavy Duty Jointers is 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 also be ordered as an option.
All of the above features are included on the Patternmaker's Jointers.

On all Heavy Duty and Patternmaker machines a quickly adjustable fence which tilts 45 degrees to the right is furnished. Fence angularity is accomplkished through an Acme thread screw and hand knob. with a positive stop provided at the 90 degrees position. As an optional extra, a fence that tilts both left and right 45 degrees at an angle to the head for shear cutting.

12" and 16 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. 24" machines are equipped with 5 hp motors of the same type. 5, 7-1/2, and 10 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 motor as a complete unit. The motor is controlled by a magnetic starter with overload and low voltage protection and 110 volt at push button.

On the Patternmaker's Jointer the infeed table is adjustable to 5 degrees in relation to cutterhead. This is extremely useful for planning drfat on deep ribs and large bevels on various pattern components.

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

Specifications
Length of Knives: 24"
Knife Size: 24" x 1-1/4" x 5/32"
Knives per Head, DMD: 4
Knives per head, Belt Drive: 4
Cutting Circle: 4-1/2"
Overall Length of Tables: 96"
Height of Tables from floor: 32-1/2"
Rear Table Width: 27"
Infeed Table Tilts: 5 degrees
Fence size: 52" x 5-1/2"
Fence Tilts: 45 degrees
Maximum Rabbet Depth: 3/4"
Drives Available: Vbelt, Direct Motor
Motor Size: 5 hp
Cutterhead RPM Vee-Belt*: 4500
Cutterhead RPM Direct Motor Drive: 3600
Optional Motor Size: 5, 7-1/2, 10 hp
Hand brake: Standard**
Net Weight: 2400
Domestic Shipping Weight: 2600
Export Shipping Weight: 3100
Cubic Measure: 144 cu. ft.
Floor Space: 44" x 96"

*Or to the customer's specifications
**Includes switch to shut off power upon application of hand brake

Equipment:
Each machine is furnished complete with one set high speed steel knives, cutting depth gauge, necessary wrenches, steel lips, maintenance andparts manual, hand brake, 110 volt at push button. 208, 203/460, 575 volt, 3 phase 60 cycle motors are standard.