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Headstock Riser Block Set

The standard Sherline lathe can accommodate parts up to 3.5″ (90 mm) in diameter. However, there are times when you may need to work on larger pieces. The Sherline headstock spacer block increases the lathe’s maximum working diameter to 6″ (152 mm), significantly expanding its capabilities.

This set includes a 1.235″ (31.37 mm) spacer block that fits beneath the headstock, along with a riser-rocker tool post to elevate the cutting tool accordingly. If you plan to turn parts between centers while using the headstock riser, you’ll also need a tailstock riser block to maintain proper alignment.

Note: Although the spacer block allows turning parts up to 6″ in diameter, the lathe’s motor power remains unchanged. This accessory is best suited for machining easy-to-cut materials or for occasional use when extra clearance is needed. If your work frequently requires this added capacity, upgrading to a larger lathe may be advisable.

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SKU: 1291 Category:

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The improper use of machine tools and their accessories can result in serious injury. Before using this tool, thoroughly read the instructions and make sure you understand its proper and safe use.

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Always wear safety glasses when operating machine tools.


Download PDF 1291 Instructions

Instructions PDF Download

Riser Rocker Tool Post
Tool Post Body Material Aluminum
Body Coating Black Anodized
Body Dimensions (H x W X D) 2.75″ x 1.25″ x 1.25″
Rocker Center Material Aluminum
Riser Block
Riser Block Body Material Aluminum
Body Coating Black Anodized
Body Dimensions (H x W X D) 1.235″ x 2.5″ x 3″
Pivot Pin Case Hardened 12L14 Steel
Alignment Key Material Precision Ground Steel
Part No. Description Quantity
12950 Headstock Riser Block 1
12980 1/4-20 x 3/8″ Flat Head Machine Screw, Slotted 1
12990 Riser Pivot Pin 1
40260 Precision Ground Head Key 1
11990 Rocker Tool Post Rocker Center 1
12850 Riser Rocker Tool Post Body 1
12860 10-32 x 2-1/4″ SHC Screw 1
40250 Tool Post T-Nut 1
40330 10-32 x 5/8″ SHC Screw 2
40660 #10 Washer 3/16 1
40690 10-32 x 3/4″ SHC Screws 2