Important: Please Identify Your Cutterhead Before Ordering
There are four different cutterhead versions for this G1018 jointer. Over the years, several changes to the sizes of the cutterheads. It is essential to identify the correct version before placing your order.
The original G1018 jointers manufactured in the United States before 1970 use a 5/8" pulley shaft, but were produced with two different cutterhead diameters:
5/8" shaft – Original Grizzly style with a 3.000" cutting circle (includes knives)
5/8" shaft – Original Grizzly style with a 3.125" cutting circle (includes knives)
Later G1018 jointers were built in Taiwan updated with the following changes in the mid-1990s.
Older Taiwan models: 3/4" (Imperial) pulley shaft
Newer Taiwan models: 19 mm (Metric) pulley shaft
To determine which version you have, measure the shaft diameter on the pulley side. You may need to remove the pulley from the cutterhead. For the most accurate measurement, use a dial caliper or digital caliper.
Taiwan Cutterhead Options
19 mm shaft – Generic 8" Metric cutterhead
Keyway width: 5 mm (0.197")
3/4" shaft – Generic 8" Imperial cutterhead
Keyway width: 0.1875"–0.1895"
Verify the Keyway Width
Because 19 mm (0.7480") and 3/4" (0.7500") differ by only 0.002", measuring the shaft diameter alone may not be sufficient. We strongly recommend measuring the keyway width as well to confirm the correct version.
Do I need to replace the original bearings?
If the bearings in your machine are in good condition, they can be reused by carefully removing them with a bearing or pulley puller. However, if the bearings are tightly pressed onto the shaft, removal may cause damage. To minimize this risk, we recommend replacing old bearings with our greased and sealed bearings, designed for long-lasting performance. For a smooth upgrade, we suggest adding the bearings to your shopping cart before completing your purchase.
We provide premium bearings from NSK, SKF, NTN, FAG, Timken. They are renowned for their high quality and performance, designed to provide durability and reliability in various applications
Do I need to to Add a Few Boxes of Carbide Inserts
We provide 5 carbide inserts and 5 screws as spare parts. However, many of our customers choose to purchase additional boxes, as the shipping costs for separate purchases can make it less economical.
Do I need a Torque Wrench?
To securely lock the carbide inserts, we recommend applying a torque of 48 to 52 Pound-Inches (or 5.42 to 5.88 Newton-Meters). (Note: 1 Newton-Meter is equal to 8.851 Pound-Inches, and 1 Pound-Inch is approximately 0.113 Newton-Meters.) It is crucial not to apply excessive torque, as this could cause the carbide inserts to crack or explode. On the other hand, using too little torque may result in the inserts not being properly secured, which could lead to cracks, shattering, or uneven height on the cutter block, causing ridges or lines on the board.
If one person is responsible for maintaining the machine, they can typically apply the same torque consistently without a torque wrench. However, when multiple people are involved in machine maintenance, ensuring uniform torque application can be challenging. For consistency and peace of mind, we recommend using a torque wrench.
What kind of steel the cutter block is made of?
The cutter block is constructed using GB/T 40Cr, a structural alloy steel of the same caliber as ASTM grade 5140, AISI 5140, SAE 5140, DIN 41Cr4, BS 41Cr4, JIS SCr440, and EN 41Cr4.The primary components of this steel are as follows: carbon (C) at a range of 0.37-0.44%, silicon (Si) between 0.17-0.37%, manganese (Mn) within 0.50-0.80%, and chromium (Cr) from 0.80-1.10%.
In terms of physical properties, this steel exhibits a tensile strength range of 115-234σb/MPa, a yield strength of 2σ 0.2 ≥/MPa, and an elongation capacity of 65 δ5≥ (%). It also has a HBS range of 123-321 and a HRC rating of 30.
This alloy steel is frequently utilized in low to moderately stressed components for machines, engines, and vehicles.
