APS - Ronstan Orbit Blocks

Orbit Block - Series 20, Ball Bearing (BB)

The incredible Series 20 Orbit Block™ is capable of loads up to 250kg (550lb) while weighing a mere 9 grams. It’s so light that it needs to be lashed down! Great for control lines on dinghies and catamarans to 5m (16ft).

Materials:

Sheave: High compression strength carbon Acetal

Ball bearings: stainless steel

Frame/Cheeks: Nylon

Description	Sheave Dia.		Max Rope		Max Working Load		Breaking Load		Weight
Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
Series 20 Ball Bearing Block	3/4	20	1/4	6	550	250	1,210	550	0.30	9

Product Review:
This product has been reviewed on APS' Blog, The Stern Scoop; take a look for more information.

RF25109 20mm Orbit Block: Single, Lashing Price: $12.71

Orbit Blocks - Series 30, Ball Bearing (BB)

Orbit Blocks™ represent the future of racing sailboat hardware. The choice of the world’s best racing sailors, they offer a no-compromise solution. Their flexible lashing and Dyneema® Link technology comes from the latest trends in development classes and grand prix ocean racing. The product of meticulous engineering, they deliver the ultimate in strength, weight saving and control.

Advanced fibre and polymer technology that is up to ten times stronger than steel delivers a product that is more compact and lighter too. Through 3D modelling, Finite Element stress analysis and mould flow analysis, our engineers made sure that everything performs both in the laboratory and in the real world. Months of on-water testing by elite sailors pushed the product to their limits. After further optimisation and fine-tuning, they’re now ready for you to test!

Applications:

Mainsheet systems and spinnaker sheets on dinghies to 5m (16ft)

Halyard, vang and backstay applications on boats to 5m (16ft)

Control line applications on larger yachts

Materials:

Sheave: High compression strength carbon black Acetal

Ball Bearings: High compression strength Acetal

Frame/Cheeks: Toughened, glass fibre reinforced Nylon

Link: UV stabilised, multi-strand impregnated SK75 Dyneema®

Note: “D” suffix blocks have a self-lubricating Nylatron® sheave and full contact bearing for high dynamic loads

Part #:	Description	Sheave Dia.		Max Rope		Max Working Load		Breaking Load		Weight
Part #:	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF35100	Single, Swivel	1-3/16	30	5/16	8	661	300	1,323	600	1.10	32
RF35100A	Single, Head Post	1-3/16	30	5/16	8	661	300	1,323	600	1.10	31
RF35100D	Single, Swivel (Nylatron)	1-3/16	30	5/16	8	661	300	1,323	600	1.10	31
RF35101	Single, Lashing	1-3/16	30	5/16	8	661	300	1,323	600	0.80	22
RF35101D	Single, Lashing (Nylatron)	1-3/16	30	5/16	8	661	300	1,323	600	0.70	21
RF35140	Single, Stand Up, Swivel	1-3/16	30	5/16	8	661	300	1,323	600	1.20	33
RF35141	Single, Stand Up	1-3/16	30	5/16	8	661	300	1,323	600	1.30	36
RF35151	Cheek	1-3/16	30	5/16	8	661	300	1,323	600	0.70	21
RF35202	Double	1-3/16	30	5/16	8	992	450	1,984	900	1.70	50
RF35212	Double w/ Becket	1-3/16	30	5/16	8	992	450	1,984	900	1.80	51
RF35284	Linked	1-3/16	30	5/16	8	661	300	1,323	600	1.60	46
RF35286	Clew Ring	1-3/16	30	5/16	8	661	300	1,323	600	2.20	63
RF35302	Triple	1-3/16	30	5/16	8	1,213	550	2,425	1,100	2.60	73
RF35312	Triple w/ Becket	1-3/16	30	5/16	8	1,213	550	2,425	1,100	2.60	75
RF35322	Triple w/ Cleat	1-3/16	30	5/16	8	1,213	550	2,425	1,100	4.40	124
RF35332	Triple w/ Becket & Cleat	1-3/16	30	5/16	8	1,213	550	2,425	1,100	4.50	126

RF35100	30mm Orbit Block: Single, Swivel	Price: $18.66	RF35100A	30mm Orbit Block: Single, Head Post	Price: $25.46
RF35100D	30mm Orbit Block: Single, Swivel (Nylatron)	Price: $25.46	RF35101	30mm Orbit Block: Single, Lashing	Price: $13.56
RF35101D	30mm Orbit Block: Single, Lashing (Nylatron)	Price: $20.36	RF35140	30mm Orbit Block: Single, Stand Up, Swivel	Price: $25.46
RF35141	30mm Orbit Block: Single, Stand Up	Price: $20.36	RF35151	30mm Orbit Block: Cheek	Price: $14.41
RF35202	30mm Orbit Block: Double	Price: $33.96	RF35212	30mm Orbit Block: Double w/ Becket	Price: $34.81
RF35284	30mm Orbit Block: Linked	Price: $28.86	RF35286	30mm Orbit Block: Clew Ring	Price: $30.56
RF35302	30mm Orbit Block: Triple	Price: $44.16	RF35322	30mm Orbit Block: Triple w/ Cleat	Price: $74.76
RF35332	30mm Orbit Block: Triple w/ Becket & Cleat	Price: $75.61

Orbit Blocks - Series 40, Ball Bearing (BB)

Ronstan’s proven ‘two-stage’ bearing system enhances durability and low friction performance across the full working load range. The Dyneema® link provides a more flexible, lighter weight and lower profile solution than traditional shackles. It is also more compatible with Dyneema®/Spectra® strops, webbing and carbon connection points than steel loop tops or shackles. Can be set at 0 or 90o orientation, provides stress free articulation with no over-rotation and a security clip locks it in place. Suitable for sheet applications on dinghies, sportsboats and small one-design keel boats, vang and backstay applications on boats to 9m (30’), and control lines on larger boats.

Applications:
- Mainsheet and Spinnaker sheets on dinghies, sportsboats and small keel boats to 9m (30ft).
- Halyard, Vang and Backstay applications on boats to 8m (26ft).

Materials:
Sheave: Carbon fiber reinforced, PTFE & silicon impregnated Nylon
Ball Bearings: High compression strength carbon black Acetal
Stage 2 Bearing: Carbon fiber reinforced, PTFE impregnated Nylon
Housing/Cheeks: Toughened, glass fiber reinforced Nylon
Rope Link: UV stabilised, multi-strand impregnated SK75 Dyneema®

Ronstan Series 40 BB Orbit Blocks - Ball Bearing
Part #	Description	Sheave Diameter		Max Rope		M.W.L.		Breaking Load		Weight
Part #	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF45101	Single	1-9/16	40	5/16	9	715	325	1,540	700	1.20	33
RF45110	Single w/ Becket and Swivel Head	1-9/16	40	5/16	9	715	325	1,430	650	1.60	44
RF45111	Single w/ Becket	1-9/16	40	5/16	9	715	325	1,540	700	1.30	36
RF45131	Single w/Becket & Cleat	1-9/16	40	5/16	9	715	325	1,540	700	3.50	98
RF45151	Cheek	1-9/16	40	5/16	9	715	325	1,540	700	1.10	32
RF45201	Double	1-9/16	40	5/16	9	1,100	500	2,205	1,000	2.40	67
RF45211	Double w/ Becket	1-9/16	40	5/16	9	1,100	500	2,205	1,000	2.50	72
RF45301	Triple	1-9/16	40	5/16	9	1,430	650	2,975	1,350	3.50	98
RF45311	Triple w/Becket	1-9/16	40	5/16	9	1,430	650	2,975	1,350	3.70	105
RF45501	Fiddle	1-9/16	40	5/16	9	715	325	1,540	700	1.70	47
RF45511	Fiddle w/ Becket	1-9/16	40	5/16	9	715	325	1,540	700	1.70	48
RF45521	Fiddle w/ Cleat	1-9/16	40	5/16	9	715	325	1,540	700	3.80	108
RF45531	Fiddle w/ Adj. Cleat	1-9/16	40	5/16	9	715	325	1,540	700	3.80	109

RF45101	40mm Orbit Block: Single	Price: $29.71	RF45110	40mm Orbit Block: Single w/Swivel Head	Price: $27.58
RF45111	40mm Orbit Block: Single w/Becket	Price: $27.58	RF45151	40mm Orbit Block: Cheek	Price: $24.61
RF45201	40mm Orbit Block: Double	Price: $52.66	RF45211	40mm Orbit Block: Double w/ Becket	Price: $59.46
RF45301	40mm Orbit Block: Triple	Price: $88.36	RF45311	40mm Orbit Block: Triple w/Becket	Price: $95.16
RF45501	40mm Orbit Block: Fiddle	Price: $39.91	RF45511	40mm Orbit Block: Fiddle w/Becket	Price: $44.16
RF45521	40mm Orbit Block: Fiddle w/Cleat	Price: $97.71	RF45531	40mm Orbit Block: Fiddle w/Becket & Cleat	Price: $95.16

Orbit Blocks - Series 40 Auto-Manual Ratchet (RT)

Bettering the world’s ultimate ratchet block is no mean feat, but that’s exactly what the Ronstan Series 40mm Orbit Block has done. A unique sheave design has 12 gripping faces that directly resist loaded line movement and provide up to 25:1 holding power, nearly double that of its nearest competitor! Available as autoratchet or manual. Sophisticated, sheave cross-hole geometry delivers superior rope wear performance and is lighter weight than its closest competitors. The machined alloy sheave and ingeniously simple mechanism ensure reliability and long life. Essential equipment when you want the most holding power you can get.

In Auto mode the ratchet mechanism engages automatically when load is applied to the block, but switches off when the load is released to allow the sheet to run out smoothly and freely. This is particularly beneficial for rapid sheeting out in bear-aways at the top mark and for tacking asymmetric spinnakers.

In Manual mode the ratchet mechanism can be switched on or off as required. This is still often the preferred feel for mainsheets by many top sailors. In the end manual or auto mode often comes down to personal feel preference. Try the block in both modes and make up your own mind – you really can’t go wrong.

Applications:
- Dinghy mainsheets on boats such as Optimist, Laser, 470’s and 49er.
- Sportsboat mainsheet systems using RF7 mainsheet swivel cleat unit.
- Spinnaker sheets on dinghies – especially modern asymmetric classes such as 29er, 49er, I14, etc.
- Sportsboat and small keel boat spinnaker sheets (lateral lead blocks).
- Control line applications on larger yachts.

Materials:
Sheave: Hard anodized Aluminum
Ball Bearings: High compression strength carbon black Acetal
Housing/Cheeks: Toughened, glass fibre reinforced Nylon
Rope Link: UV stabilised, multi-strand impregnated SK75 Dyneema®

Part #	Description	Sheave Diameter		Max Rope		M.W.L.		Breaking Load		Weight
Part #	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF46100	Single, Auto with Swivel Shackle	1-9/16	40	5/16	9	385	175	1,100	500	1.5	44
RF46100M	Single, Manual with Swivel Shackle	1-9/16	40	5/16	9	385	175	1,100	500	1.5	44
RF46101	Single, Auto	1-9/16	40	5/16	9	385	175	1,100	500	1.2	35
RF46102	Single, Manual	1-9/16	40	5/16	9	385	175	1,100	500	1.20	35
RF46111	Single, Auto w/ Becket	1-9/16	40	5/16	9	385	175	1,100	500	1.40	41
RF46112	Single, Manual w/ Becket	1-9/16	40	5/16	9	385	175	1,100	500	1.40	41
RF46121	Single, Cleat	1-9/16	40	5/16	9	385	175	1,100	500	3.40	95
RF46131	Single, Becket, Cleat	1-9/16	40	5/16	9	385	175	1,100	500	3.60	101
RF46151	Cheek, Clockwise (Auto Only)	1-9/16	40	5/16	9	385	175	1,100	500	1.30	36
RF46151A	Cheek, Counter-Clockwise (Auto Only)	1-9/16	40	5/16	9	385	175	1,100	500	1.30	36

RF46100	40mm Orbit Ratchet: Single w/ Swivel Shackle	Price: $57.76	RF46100M	40mm Orbit Ratchet: Single Manual w/ Shackle	Price: $56.91
RF46101	40mm Orbit Ratchet: Single	Price: $56.06	RF46102	40mm Orbit Ratchet: Single Manual	Price: $56.06
RF46111	40mm Orbit Ratchet: Single w/Becket	Price: $56.91	RF46112	40mm Orbit Ratchet: Single Manual w/Becket	Price: $56.91
RF46121	40mm Orbit Ratchet: Single w/Cleat	Price: $93.46	RF46131	40mm Orbit Ratchet: Single w/Becket & Cleat	Price: $103.66
RF46151	40mm Orbit Ratchet: Cheek, Clockwise	Price: $52.66	RF46151A	40mm Orbit Ratchet: Cheek, Cntr-Clockwise	Price: $52.66

Orbit Blocks - Series 55, Ball Bearing (BB)

Ronstan’s proven ‘2-stage’ bearing system further enhances durability and low friction performance across the full working load range. The flexible Dyneema® link is an extension of latest trends in grand prix ocean racing and provides a more flexible, lighter weight and lower profile solution than traditional shackles. It can be set at 0 or 90 degree orientation, provides stress free articulation without allowing over-rotation, and is locked in place with a security clip. The Ronstan Dyneema® link is also more compatible with Dyneema®//Spectra® strops and, webbing and carbon connection points than steel loop tops or shackles. 55mm Ball Bearing Orbit Blocks™ are suitable for sheet applications on dinghies, sportboats and small one-design keel boats and for control lines on larger boats.

Applications:
- Mainsheet and Spinnaker sheets on dinghies, sportboats and small keel boats to 9m (30ft).
- Halyard, Vang and Backstay applications on boats to 8m (26ft).

Materials:
Sheave: Carbon fiber reinforced, PTFE & silicon impregnated Nylon
Ball Bearings: High compression strength carbon black Acetal
Stage 2 Bearing: Carbon fiber reinforced, PTFE impregnated Nylon
Housing/Cheeks: Toughened, glass fiber reinforced Nylon
Rope Link: UV stabilized, multi-strand impregnated SK75 Dyneema®

Ronstan Series 55 BB Orbit Blocks - Ball Bearing
Part #	Description	Sheave Diameter		Max Rope		M.W.L.		Breaking Load		Weight
Part #	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF55101	Single	2-5/32	55	3/8	10	1,100	500	2,200	1,000	2.4	68
RF55110	Single w/ Becket & Swivel Head	2-5/32	55	3/8	10	1,100	500	2,200	1,000	3.1	88
RF55111	Single w/ Becket	2-5/32	55	3/8	10	1,100	500	2,200	1,000	2.6	75
RF55151	Cheek	2-5/32	55	3/8	10	1,100	500	2,200	1,000	2.5	70
RF55171	Upright Lead	2-5/32	55	3/8	10	1,100	500	2,200	1,000	3.2	91
RF55201	Double	2-5/32	55	3/8	10	1,765	800	3,520	1,600	4.7	134
RF55210	Double w/ Becket/Swivel Shackle	2-5/32	55	3/8	10	1,650*	750*	3,300	1,500	6.1	172
RF55211	Double w/ Becket	2-5/32	55	3/8	10	1,765	800	3,520	1,600	4.9	140
RF55301	Triple	2-5/32	55	3/8	10	2,200	1,000	4,410	2,000	7.2	205
RF55310	Triple w/ Becket.Swivel Shackle	2-5/32	55	3/8	10	1,650*	750*	3,300	1,500
RF55311	Triple w/ Becket	2-5/32	55	3/8	10	2,200	1,000	4,410	2,000	7.6	215
RF55410	Quad w/ Becket/Swivel Shackle	2-5/32	55	3/8	10	1,650*	750*	3,300	1,500	11.2	316
RF55501	Fiddle	2-5/32 + 1-3/8	55 + 35	3/8	10	1,100	500	2,200	1,000	3.4	95
RF55511	Fiddle w/ Becket	2-5/32 + 1-3/8	55 + 35	3/8	10	1,100	500	2,200	1,000	3.4	97
RF55521	Fiddle w/ Adj. Cleat	2-5/32 + 1-3/8	55 + 35	3/8	10	1,100	500	2,200	1,000	8.1	231
RF55531	Fiddle w/ Becket, Adj. Cleat	2-5/32 + 1-3/8	55 + 35	3/8	10	1,100	500	2,200	1,000	8.2	223

* Total block load. Load on becknet not to exceed 33% of block load. MWL - 250g (550lbs) & Breaking Load - 500kg (1,100lbs).

RF55101	55mm Orbit Block: Single	Price: $37.36	RF55110	55mm Orbit Block: Single w/ Becket & Swivel	Price: $39.91
RF55111	55mm Orbit Block: Single w/ Becket	Price: $39.91	RF55151	55mm Orbit Block: Cheek	Price: $33.96
RF55171	55mm Orbit Block: Upright Lead	Price: $47.56	RF55201	55mm Orbit Block: Double	Price: $74.76
RF55210	55mm Orbit Block: Double w/ Becket & Swivel	Price: $83.26	RF55301	55mm Orbit Block: Triple	Price: $103.66
RF55310	55mm Orbit Block:Triple w/ Becket & Swivel	Price: $105.36	RF55410	55mm Orbit Block: Quad w/ Bec & Swivel Shackle	Price: $169.96
RF55501	55mm Orbit Block: Fiddle	Price: $44.16	RF55511	55mm Orbit Block: Fiddle w/ Becket	Price: $50.96
RF55521	55mm Orbit Block: Fiddle w/ Adjustable Cleat	Price: $99.41	RF55531	55mm Orbit Block: Fiddle w/ Becket & Cleat	Price: $108.76

Orbit Blocks - Series 55, Auto-Manual Ratchet (RT)

Bettering the world’s ultimate ratchet block is no mean feat, but that’s exactly what the Ronstan Series 55mm Ratchet Orbit Block has done. It still provides the 20:1 holding power of its Series 60 predecessor, but due to the sophisticated sheave cross-hole geometry (Patent pending) it delivers superior rope wear performance, lighter weight and is the only ratchet block available that can be set in manual mode or full automatic engagement mode1 - all this for the price of a manual-only ratchet block. Control switches on both sides allow for port or starboard use in manual mode and the NC machined alloy sheave and ingeniously simple mechanism ensure reliability and long service life. Series 55 Ratchet Orbit blocks™ also come standard with all the Orbit Block™ hallmark features; Dyneema® rope link head, composite cleat arms and our composite C-Cleat. Essential equipment on racing dinghies and sportsboats, when you want the most holding power you can get.

In Auto mode the ratchet mechanism engages automatically when load is applied to the block, but switches off when the load is released to allow the sheet to run out smoothly and freely. This is particularly beneficial for rapid sheeting out in bear-aways at the top mark and for tacking asymmetric spinnakers.

In Manual mode the ratchet mechanism can be switched on or off as required. This is still often the preferred feel for mainsheets by many top sailors. In the end manual or auto mode often comes down to personal feel preference. Try the block in both modes and make up your own mind – you really can’t go wrong.

Applications:
- Dinghy mainsheets on boats such as Optimist, Laser, 470’s and 49er.
- Multi purchase catamaran mainsheet systems on boats to 8m (26ft) – RF56331.
- Sportsboat mainsheet systems using RF7 mainsheet swivel cleat unit.
- Spinnaker sheets on dinghies – especially modern asymmetric classes such as 29er, 49er, I14, etc.
- Sportsboat and small keel boat spinnaker sheets (lateral lead blocks).
- Control line applications on larger yachts.

Materials:
Sheave: Hard anodized Aluminum
Ball Bearings: High compression strength carbon black Acetal
Housing/Cheeks: Toughened, glass fibre reinforced Nylon
Rope Link: UV stabilised, multi-strand impregnated SK75 Dyneema®

Ronstan Series 55 RT Orbit Blocks - Auto-Manual Ratchets
Part #	Description	Sheave Diameter		Max Rope		M.W.L.		Breaking Load		Weight
Part #	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF56100	Single w/ Swivel Head (Metal)	2-5/32	55	3/8	10	550	250	1,430	650	2.90	82
RF56101	Single	2-5/32	55	3/8	10	550	250	1,980	900	2.80	78
RF56111	Single w/ Becket	2-5/32	55	3/8	10	550	250	1,980	900	2.90	82
RF56121	Single w/ Adj. Cleat	2-5/32	55	3/8	10	550	250	1,980	900	7.10	200
RF56131	Single w/ Becket, Adj. Cleat	2-5/32	55	3/8	10	550	250	1,980	900	7.20	205
RF56151	Cheek, Clockwise	2-5/32	55	3/8	10	550	250	1,980	900	2.70	76
RF56151A	Cheek, Counter-Clockwise	2-5/32	55	3/8	10	550	250	1,980	900	2.70	76
RF56331	Triple w/ Becket, Adj. Cleat	2-5/32	55	3/8	10	1,650	750	3,300	1,500	12.20	345
RF56511	Fiddle w/ Becket	2-5/32	5	3/8	10	550	250	1,650	750	3.80	108
RF56531	Fiddle w/ Becket, Adj. Cleat	2-5/32	5	3/8	10	1,650	750	3,300	1,500	8.60	231

Product Review:
This product has been reviewed on APS' Blog, The Stern Scoop; take a look for more information.

RF56100	55mm Orbit Ratchet: Single w/Swivel Head	Price: $76.46	RF56101	55mm Orbit Ratchet: Single	Price: $76.46
RF56151	55mm Orbit Ratchet: Cheek, Clockwise	Price: $66.26	RF56151A	55mm Orbit Ratchet: Cheek, Cntr-Clockwise	Price: $66.26
RF56331	55mm Orbit Ratchet: Triple w/ Cleat	Price: $186.96	RF56511	55mm Orbit Fiddle, Becket, Auto	Price: $74.76
RF56531	55mm Orbit Ratchet: Fiddle w/ Becket, Cleat	Price: $109.61

Orbit Blocks - Series 55, Accessories

RF2455: Stand-Up Base: Kit features a clatter-free rubber boot. You can attach the Dyneema® link so that the block is aligned with the stand-up base or across it. It’s a neat, low-profile solution which allows full articulation.

RF900408: Dyneema Link: Replacement link that suits all single & fiddle Ball Bearing(BB) or Ratchet(RT) blocks.

RF900510: Dyneema Link: Replacement link that suits all double & triple Ball Bearing(BB) or Ratchet(RT) blocks.

RF50001: Link Retainer Clip: Replacement retainer clip that suits all single and fiddle Ball Bearing(BB) or Ratchet(RT) Blocks.

RF50002: Link Retainer Clip: Replacement retainer clip that suits all double Ball Bearing(BB) and Ratchet(RT) blocks, as well as triple Ratchet(RT) blocks.

RF50003: Link Retainer Clip: Replacement retainer clip that suits all triple Ball Bearing (BB) blocks.

RF2455	Stand Up Base: Series 55 BB & RT Blocks	Price: $9.31	RF50001	Link Retainer Clip: Series 55 Single & Fiddle	Price: $3.36
RF50002	Link Retainer Clip: Series 55 Double & Triple	Price: $3.78	RF50003	Link Retainer Clip: Series 55 BB Triple	Price: $3.78
RF900408	Dyneema Link: S55 Singl/Fiddle, S40 Dbl/Trp	Price: $9.31	RF900510	Dyneema Link: S55 Double/Triple, S70 Single	Price: $9.31

Orbit Blocks - Series 70, Ball Bearing (BB)

Kilogram for kilogram of working load, BB Orbit Blocks™ are the world’s lightest. The unique orbital design allows the bearing to only be in the active areas of the floating sheave, minimizing the mass of the inactive return race and hub. The orbital ball-bearing arrangement gives the largest possible bearing race diameter, which maximises load performance. The Dyneema® Link is produced from FSE Robline SK75 fibre, which is 10 times stronger and lighter than steel, and provides the final connection from the block to the load point. The flexible Dyneema® Link also provides controlled rotation and 0° or 90° orientation. It connects directly to the head of the block rather than to an intermediate head post, reducing weight and giving the lowest possible profile while allowing full articulation.

Applications:
- Mainsheet systems and spinnaker sheets on sportsboats and small keelboats to 11m (36ft)
- Halyard, Vang and Backstay application on boats to 9m (30ft)
- Control line applications on larger yachts

Materials:
Ball Bearings: High compression strength carbon black Acetal
Stage 2 Bearing: Carbon fibre reinforced, PTFE impregnated Nylon
Frame/Cheeks: Toughened, glass fibre reinforced Nylon
Rope Link: UV stabilised, multi-strand impregmented SK75 Dyneema®

Ronstan Series 70 BB Orbit Blocks - Ball Bearing
Part #	Description	Sheave Diameter		Max Rope		M.W.L.		Breaking Load		Weight
Part #	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF75101	Single	2-3/4	70	1/2	12	1,540	700	3,830	1,400	4.5	128
RF75111	Single w/ Becket	2-3/4	70	1/2	12	1,540	700	3,830	1,400	5.0	141
RF75151	Cheek	2-3/4	70	1/2	12	1,540	700	3,830	1,400	4.3	122
RF75211	Double w/ Becket	2-3/4	70	1/2	12	2,420	1,100	3,830	2,200	9.7	274

RF75101	70mm Orbit Block: Single	Price: $63.71		RF75111	70mm Orbit Block: Single w/ Becket	Price: $72.21
RF75151	70mm Orbit Block: Cheek	Price: $64.56		RF75211	70mm Orbit Block: Double w/ Becket	Price: $135.96

Orbit Blocks - Series 70, Auto Ratchet (RT)

The auto mode of the ratchet mechanism engages when load is applied, but switches off when it's released. This lets the sheet run out smoothly and freely-great for rapid easing of the sheet and for gybing asymmetric spinnakers. Quite simply, Ronstan Ratchet Series 70 Orbit Blocks™ have the highest holding power available. The sophisticated NC-machined sheave features Generation 2 of our patented sheave cross-hole geometry. Its holding power is up to 21:1, almost double that of our nearest competitior. The unique sheave design has 12 gripping faces which directly resist loaded line movement. The Dyneema® Link is easily fitted and is retained securely by a moulded retainer clip and the flexible link can be left with one end attached to the block when fitting - no more lost shackle pins.

Applications:
- Dinghy mainsheet systems - when maximum holding power is required.
- Mainsheet systems on sportsboats using RF7 mainsheet swivel cleat unit.
- Control line applications on larger yachts.
- Spinnaker sheets on sportsboats and small keel boats (lateral lead blocks).
- Spinnaker sheets on sports boats and small keel boats - especially modern asymmetric classes.

Materials:
Sheave: Hard anodised Aluminium.
Ball Bearings: High copression strength carbon block Acetal.
Frame/Cheeks: Toughened, glass fibre reinforced Nylon.
Rope/Link: UV stablised, multi-strand impregnated SK75 Dyneema.

Ronstan Series 70 RT Orbit Blocks
Part #	Description	Sheave Diameter		Max Rope		M.W.L.		Breaking Load		Weight
Part #	Description	in	mm	in	mm	lb	kg	lb	kg	oz	g
RF76101	Single, Auto	2-3/4	70	3/8	10	660	300	2,750	1,250	5.3	150
RF76111	Single w/ Becket, Auto	2-3/4	70	3/8	10	660	300	2,750	1,250	5.7	162

RF76101 70mm Orbit Block: Single, Ratchet Price: $101.96 RF76111 70mm Orbit Block: Single w/ Becket, Ratchet Price: $104.51

Orbit Blocks - Series 70, Accessories

RF2457: Stand-Up Base: Kit features a clatter-free rubber boot. You can attach the Dyneema® link so that the block is aligned with the stand-up base or across it. It’s a neat, low-profile solution which allows full articulation.

RF900510: Dyneema Link: Replacement link that suits all Series 70 Single Ball Bearing(BB) or Ratchet(RT) blocks.

RF900612: Dyneema Link: Replacement link that suits all Series 70 Double Ball Bearing(BB) blocks.

RF70001: Link Retainer Clip: Replacement retainer clip that suits all Series 70 Single Ball Bearing(BB) or Ratchet(RT) Blocks.

RF70002: Link Retainer Clip: Replacement retainer clip that suits all Series 70 Double Ball Bearing(BB) blocks.

RF2457	Stand Up Base: Series 70 BB & RT Blocks	Price: $12.71	RF70001	Link Retainer Clip: Series 70 Single Blocks	Price: $3.36
RF70002	Link Retainer Clip: Series 70 Double Blocks	Price: $3.36	RF900510	Dyneema Link: S55 Double/Triple, S70 Single	Price: $9.31
RF900612	Dyneema Link: Series 70 BB Double	Price: $9.31