The MAFELL SG 500 Slot Mortising Attachment (Ref. No. 201005) provides heavy-duty plunge mortising capabilities up to a depth of 500 mm (19 11/16 in.) in solid wood and laminated timber beams. Engineered for timber frame construction and structural beam joinery, this attachment features a rigid, torsion-free guide stand designed to maintain precise alignment across deep plunge cuts.

The guide angle pivots up to 45 degrees in both directions for executing angled slot mortises relative to the timber edge, with vertical edge spacing easily set via an integrated scale. For cutting slots wider than standard single-cut dimensions, the guide rail accepts interchangeable guide pieces mounted at the front end, ensuring the chain tracks accurately during secondary passes without slipping into the existing slot.

Features & Benefits

• 500 mm Mortising Depth: Plunges up to 500 mm (19 11/16 in.) deep for large structural timber and glulam joinery.
• 45-Degree Dual Tilt Range: Guide stand tilts up to 45 degrees on either side for angled mortising applications.
• Torsion-Free Support Stand: Rigid support structure prevents deflection for dimensionally accurate slots.
• Guide Piece System: Includes 3 mm, 5 mm, and 7 mm guide pieces to prevent chain drift during wider multi-pass slotting.
• Integrated Edge Scale: Enables quick, repeatable setting of vertical edge spacing.
• Solid Wood and Glulam Compatibility: Designed specifically for solid wood and glue-laminated beams.

What's Included

• (1) Slot Mortising Attachment SG 500
• (1) Guide Piece 3 mm (1/8 in.) (Ref. No. 202815)
• (1) Guide Piece 5 mm (3/16 in.) (Ref. No. 202816)
• (1) Guide Piece 7 mm (1/4 in.) (Ref. No. 202817)
• (1) Clamping Device (Ref. No. 039602)
• (1) Grease Gun (Ref. No. 076158)

Shipping: Beaver Industrial Supply offers free shipping on orders over $199, with the exception of Sawstop and Laguna, which require additional fees to be collected. Other exceptions apply as noted on product pages.

We reserve the right to determine the fastest and most cost-effective manner of transportation for all orders that qualify for free shipping. Our shipping carriers cannot deliver to PO box or U.S. military post office box addresses, such as APO and FPO, so we require a physical street address for delivery. We use USPS, which typically takes 2-8 days for delivery, depending on your location, for smaller items and UPS Ground for all other ground shipments under 150 pounds.

• Returns: We accept returns and exchanges for a fee up to 30 days in unopened, new, and unused condition in the original packaging. Exceptions apply.

Please note, NO REFUNDS will be given on any new, used, or damaged item if it is not returned in the original packaging, no matter what condition the packaging is in. If the item qualifies for free shipping, you will be charged the original shipping cost and are responsible for shipping the product back with the shipping carrier of your choice.

We must receive the item undamaged. We recommend you package it accordingly and purchase insurance for higher-priced items to ensure you receive the full refund minus any incurred fees as applicable. We reserve the right to refuse the return of accessories.

Because items are your responsibility until they reach us, we recommend that you send the parcel using a delivery service that insures you of the value of the goods. Return shipping is at the customer's cost. At Beaver Industrial Supply’s discretion, delivery charges can be refunded if the goods are defective.

Returns require a return authorization number. Please call customer service at 314-773-5999 or submit a customer service inquiry to start the exchange or return process and receive an authorization number.

Machinery too large for parcel shipment (palletized or crated) is only returnable if there is a material defect that cannot be resolved by replacing components.