Technical Information · issue 25 of 2011
New .325" STIHL RAPID™ Duro 3 Saw Chains
IssueTI 25/2011
Full text
Page 1 of 4
STIH)
Technical Information 25.2011
New .325" STIHL RAPID™ Duro 3 Saw Chains – Series 3665, 3666, 3667
Contents
1. .325" STIHL RAPID™ Duro 3
2. Sharpening the saw chain
3. Service notes
4. Spare parts
5. Saw chain type
1. .325" STIHL RAPID™ Duro 3
The world's first .325" carbide-tipped, low-profile The new .325" STIHL RAPID™ Duro 3 provides
saw chain – exclusively at STIHL servicing dealers. long service life, high comfort and low kickback
tendency in combination with good cutting
performance.
Target user groups
- Gardeners and landscapers
- Occasional users
- Tradespeople
- Farmers and foresters
- Users who have little experience in sharpening
689TI171 KN
saw chains
Applications
The new .325" STIHL RAPID™ Duro 3 remains - Cutting firewood
sharp up to four times longer than standard saw
chains, especially under extreme cutting conditions. - Pruning and tending stands
This is ensured by precision soldered, carbide- - Abrasive operating conditions, e.g., sandy
tipped cutters. wood, cement-encrusted formwork
The new low-vibration and reduced-kickback
carbide-tipped saw chain exhibits long service life,
even under extreme cutting conditions.
TI_25_2011_30_01_01.fm englisch / English
)m~ge 2 Technical Information 25.2011
1.1 Advantages 1.3 Vibrations
– long service life – The method of reducing the vibration level while
up to 4x longer tooth service life in comparison maintaining high cutting performance is the same
with a standard saw chain one used in other comfort saw chains.
– Cutting performance comparable with a
1.4 Saw chain designation
standard saw chain
The new .325" STIHL RAPID™ Duro 3 saw chain
– Maximum comfort
does not have a comfort "C“ in the saw chain
– Low kickback – due to the humped drive link designation. In the future, the "C" in the saw chain
designation will be dropped from all comfort saw
1.2 Features chains. For example, the .325" RMC will become a
.325" RM and the .325" RMC3 will become a
.325" RM3.
1 2 1
2. Sharpening the saw chain
Like all STIHL carbide-tipped saw chains (Duro), the
.325" STIHL RAPID™ Duro 3 is sharpened with the
USG (universal sharpener) and the new special
diamond grinding wheel 5203 757 0906.
4 3 Carbide-tipped cutters cannot be sharpened with a
689TI172 KN
standard, round saw chain file.
2.1 Side plate and top plate cutting angle,
– Cutter (1) of finely structured Tungsten carbide
depth gauge setting, tooth length
guarantees long service life – even when
sawing dirty and abrasive wood.
– The drive link is extended upwards by c
a hump (2) to guide the cutter into the timber
smoothly and gently, thus improving the chain's a
smooth running and reducing its tendency to
kick back.
The color code of the new saw chain is green. b
As with all STIHL comfort saw chains 689TI173 KN
– The letter "C" features in each cutter and an d
arrow head in each tie strap (3).
In the future, the patented OILOMATIC® principle a= sharpening angle 30°
will be expanded with concave depressions – the b= side plate angle 80°
tiny lubrication indentations (4) on both sides of the
c= depth gauge setting 0.025“ (0.65 mm)
drive links lead to the following improvements:
d= minimum tooth length – if the minimum tooth
– Extension of saw chain service life by up to 10% length is reached during resharpening,
as a result of optimized lubrication – in replace saw chain
comparison to a conventional saw chain without
OILOMATIC® system
Clean the saw chain; check it for cracks and
– Less accumulation of dirt on drive links and damaged chain components. Replace damaged or
guide bar groove worn chain components and adapt these parts to
– Reduced guide bar wear the remaining parts in terms of shape and level of
wear.
TI_25_2011_30_01_01.fm Page 2 of 4
Technical Information 25.2011 Page 3
2.2 Diamond grinding wheel 3. Service notes
For sharpening the 3/8" STIHL RAPID™ Duro 3, as The saw chain can be repaired with the rivet
with the 3/8" STIHL PICCO™ Duro 3, the diamond spinners and chain breakers NG 4, NG 5 and NG 7.
grinding wheel 5203 757 0906 is used.
For alternative sharpening devices, the diamond 3.1 Replacing cutters
grinding wheel 5.00x0.24x0.87" (125x6x22.2 mm) Repair kits "Right-hand cutter" and "Left-hand
with the part number 5203 757 0908 is available. cutter" are available for replacement. Each repair kit
This grinding wheel is characterized by a 7/8“ comprises five cutters and five rolled tie straps.
(22.2 mm) interior diameter arbor size.
When servicing or repairing the saw chain, note the
2.3 Settings on the USG sharpener running direction (arrow head) of the tie strap and
cutter. The bevel of the tie strap and cutter must be
to the rear of the direction of travel.
+
A
+
+ C
689TI009 KN
The following settings are necessary for sharpening
the .325" STIHL RAPID™ Duro 3:
Scale Cutter 1) Depth gauge 2)
right left
A +30 +30 +40
B +15 -15 0
C +30 -30 0
1)
Grinding wheel 5203 757 0906
2) Grinding wheel 5203 750 7015
2.4 Sharpening the master cutter
Carefully move the support downward – the grinding
wheel should only briefly contact the cutter
removing little material max. 0.01" – (0.3 mm).
In the event of decreased grinding performance,
dress the grinding wheel 5203 757 0906 with the
sharpening stone 5203 893 6200. To do this, press
the sharpening stone briefly and firmly against the
rotating grinding wheel.
TI_25_2011_30_01_01.fm
)m~ge 4 Technical Information 25.2011
4. Spare parts
Item Designation Part No. Remarks
1 Cutter repair kit, r/h 3667 007 1000 1)
2 Cutter repair kit, l/h 3667 007 1001 2)
3 Tie strap with rivets 3629 660 7200
4 Tie strap without rivets 3629 662 4200
5 Humped drive link .325"; 3632 662 1100
0.050" (1.3 mm)
6 Humped drive link .325"; 3633 662 1100
0.058" (1.5 mm)
7 Humped drive link .325"; 3634 662 1100
0.063" (1.6 mm)
8 Drive link 0.325"; 0.050" (1.3 mm) 3862 662 1000
9 Drive link 0.325"; 0.058" (1.5 mm) 3863 662 1000
10 Drive link 0.325"; 0.063" (1.6 mm) 3603 662 1000
Remarks
1) Comprises five right-hand cutters and five left-hand tie straps with rivets
2) Comprises five left-hand cutters and five right-hand tie straps with rivets
5. Saw chain type
Chain types Abbreviated designation Chain pitch Drive link gauge
3665 23 RD3 .325" 0.050" (1.3 mm)
3666 25 RD3 .325" 0.058" (1.5 mm)
3667 26 RD3 .325" 0.063" (1.6 mm)
The .325" RD3 saw chain is available in the same
cutting lengths as the .325" RM3 saw chain.
© ANDREAS STIHL AG & Co. KG, 2011 Technical Documentation
D1/MTR-bl
TI_25_2011_30_01_01.fm Page 3 of 4
Page 4 of 4
Extracted from the manufacturer's 2012 service catalogue. Most of these PDFs embed fonts with a shifted character map, so the text above was recovered rather than copied — read it as a faithful but imperfect transcription, and treat the page image above each block as the authority where the two disagree — the figures exist only there, because they are vector drawings that text extraction cannot keep.