Index | Use chart | 57 mm | 75 mm | 100 mm | 125 mm & 150 mm | Teardrop | Crossover | Mastbase Halyard Lead & Flip-Flop | Footblocks | AirRunners | Stainless Steel Runners | Opening Foot Blocks | Snatch | ESP Blocks | Stainless Steel ESP | Stainless Steel Blocks | Specifications

Big Boat blocks > 125 mm & 150 mm

125 mm and 150 mm AirBlocks^® feature Torlorf rollers in a self-contained center cage. Rollers stay parallel for low-friction efficiency. UV-resistant, carbon-black Delrin^® balls carry sideloads.

Used on offshore boats, these blocks offer a no "climb-out" deep groove sheave with radiused edges to protect line. Sculpted aluminum sideplates and thin-profile sheaves make these blocks very lightweight. No stainless-to-aluminum contact prevents corrosion.

Use for:

Control Lines

3016 3021

Three-way head can be locked or allowed to swivel Sideplate protects ball bearings Easy disassembly for service Sideload balls prevent friction from unfair leads Deep-groove sheave

3018 3022

3032

Part No.	Description	Sheave	Length		Weight w/shackle		Shackle pin		Max Line		Safe working load		Breaking strength
		mm	in	mm	oz	g	in	mm	in	mm	Ib	kg	Ib	kg
3016	Single/swivel	125	10	254	36.8	1042	1/2	12	3/4	19	11000	4990	22000	9977
3018	Stand-up*	125	91/16	230	43.9	1246	—	—	3/4	19	11000	4990	22000	9977
3021	Single/swivel	150	12	305	61	1730	5/8	16	1	25	15000	6802	30000	13605
3022	Stand-up**	150	111/8	283	66	1878	—	—	1	25	15000	6802	30000	13605
3032	Straphead	125	67/8	175	26	737	—	—	3/4	19	11000	4990	22000	9977

* - Uses 648 padeye Refer to this page for hole spacing
** - Uses 629 padeye Refer to this page for hole spacing

Index | Use chart | 57 mm | 75 mm | 100 mm | 125 mm & 150 mm | Teardrop | Crossover | Mastbase Halyard Lead & Flip-Flop | Footblocks | AirRunners | Stainless Steel Runners | Opening Foot Blocks | Snatch | ESP Blocks | Stainless Steel ESP | Stainless Steel Blocks | Specifications