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Tel:+1-519-880-8181 International, Toll- Free (Canada & USA) 1-877-417-4327
Tel:+1-519-880-8181 International, Toll- Free (Canada & USA) 1-877-417-4327

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Expanding Mandrels

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SKU 436-7860
Sold out
Original price $80.00 - Original price $80.00
Original price
$80.00
$80.00 - $80.00
Current price $80.00
Diameter (mm) - Shank Taper: 14.7-18.7-MT2
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Cancellation policy

Cancel for any reason at any time until your order shipped. Please be aware that banks charge for each payment transaction, so we will deduct these fees from the refunded amount. Once your order has shipped, you may return your order. For details, please review our Returns and Cancellations policies. Special order items may not be eligible for cancellation.

Return Policy

Most items can be returned within 30 days of receipt for a refund of the product cost less return shipping. Shipping, duties, and taxes are not refundable. For details, please review our Returns and Cancellations policies.

International Shipping

The product price and shipping and handling cost do not include import duties, taxes, or brokerage fees. As the transportation fee for your order is the only fee we charge, it is the buyer's responsibility to pay for these charges. We recommend that you contact your country's customs office or visit their website to determine if there will be any additional costs.

The Harmonized Tariff Schedule (HS code) for spiral cutterheads and other woodworking tools is 8466.92.50.10.

Features:

  • The expanding mandrel offers flexibility when machining.
  • the mandrel grips the inside of a workpiece, holding it firmly.
Model D(mm) Shank Taper E(mm) F(mm) Sleeves Extensibility
436-7860 14.7-18.7 MT2 35 41.5 5 1mm
436-7861 14.7-18.7 MT3 35 41.5 5 1mm
436-7862 14.7-18.7 MT4 35 41.5 5 1mm
436-7863 19.7-23.7 MT2 40 46.5 5 1mm
436-7864 19.7-23.7 MT3 40 46.5 5 1mm
436-7865 19.7-23.7 MT4 40 46.5 5 1mm
436-7866 24.7-28.7 MT2 46 52.5 5 1mm
436-7867 24.7-28.7 MT3 46 52.5 5 1mm
436-7868 24.7-28.7 MT4 46 52.5 5 1mm
436-7869 24.7-28.7 MT5 46 52.5 5 1mm
436-7870 29.7-33.7 MT3 50 56.5 5 1mm
436-7871 29.7-33.7 MT4 50 56.5 5 1mm
436-7872 29.7-33.7 MT5 50 56.5 5 1mm
436-7873 34.7-38.7 MT3 60 66.5 5 1mm
436-7874 34.7-38.7 MT4 60 66.5 5 1mm
436-7875 34.7-38.7 MT5 60 66.5 5 1mm
436-7876 39.7-43.7 MT3 60 66.5 5 1mm
436-7877 39.7-43.7 MT4 60 66.5 5 1mm
436-7878 39.7-43.7 MT5 60 66.5 5 1mm
436-7879 44.7-52.7 MT3 80 92 5 2mm
436-7880 44.7-52.7 MT4 80 92 5 2mm
436-7881 44.7-52.7 MT5 80 92 5 2mm
436-7882 54.7-62.7 MT3 90 102 5 2mm
436-7883 54.7-62.7 MT4 90 102 5 2mm
436-7884 54.7-62.7 MT5 90 102 5 2mm
436-7885 64.7-80.7 MT4 100 112 9 2mm
436-7886 64.7-80.7 MT5 100 112 9 2mm
436-7887 81.7-99.7 MT4 122 134 10 2mm
436-7888 81.7-99.7 MT5 122 134 10 2mm
436-7889 100.7-118.7 MT5 140 152 10 2mm
436-7890 119.7-139.7 MT5 180 192 11 2mm

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
If you add the bearings to your order, we will preinstall them for you when premounting is possible, saving you the hassle of doing it yourself.

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.